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1
Fei, Xu. „THE IMPACT OF INDUSTRIAL TOURISM ON ECONOMIC MODELS - TRANSFORMATION OF ZHENGZHOU'S ECONOMIC MODEL“. Economics and Innovative Technologies 11, Nr. 1 (26.02.2023): 428–37. http://dx.doi.org/10.55439/eit/vol11_iss1/a46.
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Zhengzhou, along with Xi'an, Chengdu, Chongqing and Wuhan, is one of the most important cities in inland China. It is the second largest city in central China, after Wuhan. It is the economic center of the province and the surrounding areas such as southeastern Shanxi and southwestern Shandong. The main purpose of this study is to learn the effect of Zhengzhou industrial tourism on Zhengzhou economic models as well as the deep changing of Zhengzhou’s economic model. The result shows that the relationship between industrial tourism and Zhengzhou’s economic is significant. The findings can suggest that developing industrial tourism in Zhengzhou influences on Zhengzhou’s economy positively.
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Ji, Zhengxin, Yueqing Xu und Hejie Wei. „Identifying Dynamic Changes in Ecosystem Services Supply and Demand for Urban Sustainability: Insights from a Rapidly Urbanizing City in Central China“. Sustainability 12, Nr. 8 (22.04.2020): 3428. http://dx.doi.org/10.3390/su12083428.
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Identifying the balance and dynamic changes in supply and demand of ecosystem services (ES) can help maintain the sustainability of the regional ecosystem and improve human well-being. To achieve a sustainable ecological management regime in Zhengzhou City, this study presented a comprehensive framework for identifying dynamic changes of ES supply and demand and managing ES. Using land use data of Zhengzhou City in 1995, 2005, and 2015 and incorporating expert knowledge and the ES evaluation matrix, we evaluated the spatiotemporal changes in the ES supply and demand in Zhengzhou. Gradient analysis was conducted to identify urban–rural patterns in the budgets of ES supply and demand. Spatial autocorrelation analysis was employed to identify the hotspot areas of ES surpluses or deficits. The research results show the following: (1) In the past 20 years, the supply-and-demand relationship of ES in Zhengzhou has gradually evolved in a direction where supply falls short of demand. The average budget index of Zhengzhou’s ES supply and demand decreased from 7.30 in 1995 to −4.89 in 2015. Changes in the supply and demand status of ES in Zhengzhou corresponded to the background of rapid urbanization. (2) Urban–rural gradient differences exist in the budgets of ES supply and demand in Zhengzhou. Core development areas, such as the Zhengzhou urban areas, are in deficit, whereas a balance or surplus can be observed in rural areas far from urban centers. (3) The surplus hotspots of ES budgets were mainly distributed in the western and southern mountainous areas of Zhengzhou, and they were scattered and the scope shrank, with a decrease of 2.73 times in 20 years, whereas the deficit hotspots expanded outward with each urban area as the center, with an increase of 5.77%. Ecological management zoning (ecological conservation area, ecological improvement area, and ecological reconstruction area) with the effective guidance of ecological and economic policies could comprehensively improve ES management and achieve urban sustainability. The framework in this study can easily and quickly assess the supply and demand status of ES and provide scientific support for the ecological management in rapidly urbanizing areas.
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Yang, Yang, Ruizhen He, Dongge Ning, Guifang Wang, Manshu Liu und Albert Fekete. „An Overview of Urban Park Development in Zhengzhou, China“. Acta Biologica Marisiensis 4, Nr. 2 (01.12.2021): 1–13. http://dx.doi.org/10.2478/abmj-2021-0009.
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Abstract As essential elements of green spaces and social spaces in cities, urban parks significantly improve the quality of life and promote urban sustainability. Research on the development process of urban parks can be meaningful for coping with the current issues and future opportunities facing cities. This study takes Zhengzhou as the case aiming to outline the development process and characteristics of urban parks within the city. We adopted the empirical analysis to review the evolution processes and trends of Zhengzhou’s urban parks from the perspective of implementation approaches, spatial layout, and functions and uses. Results reveal four subsequent phases: the emergence phase (1949–1977), the growth phase (1978–1996), the acceleration phase (1997–2012), and the promotion phase (after 2012), according to the periods of urban development and the opportunities for green space development. The discussion includes development issues and strategies regarding land use approaches, user group needs, and public participation. The findings may help formulate adaptive and effective policies and planning tools for urban parks and provide a basis for further research on urban parks and Zhengzhou’s road to the ideal “Park City”.
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Hao, Mengge, Dongyong Zhang und Stephen Morse. „Waste Separation Behaviour of College Students under a Mandatory Policy in China: A Case Study of Zhengzhou City“. International Journal of Environmental Research and Public Health 17, Nr. 21 (05.11.2020): 8190. http://dx.doi.org/10.3390/ijerph17218190.
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The need for effective solid waste management (SWM) is an important environmental and public health issue. As a key way of minimizing municipal solid waste (MSW), source separation has in recent years become the centre of discussion in China. Following the example of Shanghai, the city of Zhengzhou introduced its mandatory waste separation measures on 1 December 2019. But does the mandatory regulation work? This study aims to investigate the waste separation behaviour of college students in Zhengzhou under the mandatory regulation and the motivations behind students’ behaviour. A questionnaire-based survey was carried out on 62 university campuses in Zhengzhou City, and a total of 1747 valid questionnaires were completed across these campuses and analysed. It was found that under Zhengzhou’s mandatory measures, college students do have a basic knowledge of waste separation and most are familiar with where kitchen waste should be placed, but they have problems categorizing some recyclables such as glass, hazardous waste such as lightbulbs and other waste such as cigarette butts and napkins. It was also found that college students’ waste separation behaviour, their attitude towards waste separation and the convenience of waste sorting facilities in Zhengzhou in the mandatory era have been improved compared to the era prior to mandatory waste separation. The results also indicate that most of college students (86.7%) always or sometimes undertake waste separation, and students majoring in science and senior year undergraduates are more likely to participate in the practice of waste separation. Other influencing factors of college students’ waste separation behaviour include convenience of waste sorting facilities, their willingness to separate waste, knowledge of a related field, attitude towards waste separation, peer pressure as well as the existence of a reward and penalty system. Management strategies for improving college students’ waste separation behaviour under mandatory regulation are also discusses and a number of recommendations for improvement are made.
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Zhang, Ke, und Jae Eun Lee. „Using the Social Media Data in Disaster Management: Heavy Rainstorm in Zhengzhou, China“. Crisis and Emergency Management: Theory and Praxis 13, Nr. 9 (30.09.2023): 1–14. http://dx.doi.org/10.14251/jscm.2023.9.1.
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This paper aims to study Weibo posts about the 2021 Zhengzhou rainstorm disaster to demonstrate the usefulness of social media data in disaster management. Social media data, as an emerging source of big data is increasingly being used to disseminate important information about disasters to the public. This paper explores the usefulness of Weibo data in disaster management by taking the Zhengzhou rainstorm in 2021 as a case. First, based on web crawlers and Weibo API, this study obtained Weibo posts related to topics of rainstorm. A temporal analysis of related Weibo posts shows that the temporal trend of the number of rainstorm related Weibo posts coincided with the developmental stages of the rainstorm. Second, topic extraction from Weibo content was performed, which found that people discuss different topics on social media in different disaster stages. Finally, the hot keywords of Weibo posts were extracted, which most intuitively expresses people's information exchange during rainstorm. This study demonstrates that disaster information extracted form social media could reflect the public's disaster risk perception and material needs well and have potential to disaster management resource.
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Chang, Mingyuan, Longyang Huang, Tianlin Zhai, Jiawei Zhu, Yuanbo Ma, Ling Li und Chenchen Zhao. „A Challenge of Sustainable Urbanization: Mapping the Equity of Urban Public Facilities in Multiple Dimensions in Zhengzhou, China“. Land 12, Nr. 8 (04.08.2023): 1545. http://dx.doi.org/10.3390/land12081545.
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The rapid urbanization and population growth in China have brought the issues of social equity and justice to the forefront. The supply and layout of public service facilities play a crucial role in determining the residents’ quality of life and have become a significant factor triggering social equity and justice concerns. This study took Zhengzhou’s urban core as an example. From the perspectives of regional equality, spatial equity, and social justice, the service area analysis and Gaussian two-step floating catchment area method were used to analyze the public service facilities’ layout situation and the equity and justice issue and to discuss the causes of the current situation. The study found that the social equity and justice of public facilities in Zhengzhou’s urban core were more prominent. The accessibility of public facilities inside and outside the 3rd ring road of the urban core exhibited marked differences, indicating a need for improvement in regional equality and spatial equity. Vulnerable groups lacked special care and public facilities lacked justice. Combined with the development process of urbanization in Zhengzhou, this paper argued that this was closely related to the government’s public policies.
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Yang, Yarong, Jie Ma, Hong Liu, Lili Song, Wei Cao und Yifan Ren. „Spatial Heterogeneity analysis of urban forest ecosystem services in Zhengzhou City“. PLOS ONE 18, Nr. 6 (08.06.2023): e0286800. http://dx.doi.org/10.1371/journal.pone.0286800.
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Understanding the spatial distribution of urban forest ecosystem services is essential for urban planners and managers to effectively manage cities and is an essential part of sustainable urban development. Mapping the spatial distribution of urban forest ecosystem services and improving the accuracy of its assessment scale will undoubtedly provide a more accurate reference basis for later management. In this study, we used the i-Tree Eco model and kriging interpolation to quantify and map urban forest ecosystem services and their spatial distribution in Zhengzhou, a city along the lower reaches of the Yellow River in China; analyzed the mapping errors and applicable conditions; and further explored the spatial differences using geographic probes. The i-Tree Eco model estimation results showed that the total carbon storage in the urban forest of Zhengzhou city was 75.7 tons, the annual carbon sequestration was 14.66 tons, the trees and shrubs in the urban area of Zhengzhou city could effectively avoid a total of 307.86 m3 of surface runoff per year, and trees and shrubs removed 411.8 kg/year of air pollution (O3, CO, NO2, PM2.5, PM10, and SO2). The spatial distribution of all urban forest ecosystem services showed significant heterogeneity, but the spatial evaluation precision of different factors varied. GDP and population data showed a negative correlation with ecosystem services, and ecosystem services were abundant in watershed and woodland areas. This study differs from traditional assessments based on regional data due to its improved spatial evaluation accuracy, and the results, discussion, and analysis not only help Zhengzhou’s own urban development, but also provide a basis for the future construction and management of other cities, the Central Plains urban agglomeration, and the surrounding larger regions. This will contribute to the enhancement of ecosystem services and thus improve the ecological conditions of the region. This will also have a positive effect on the health of urban residents.
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Wang, Qizhen, Tong Zhao, Rong Wang und Ling Zhang. „Backward Trajectory and Multifractal Analysis of Air Pollution in Zhengzhou Region of China“. Mathematical Problems in Engineering 2022 (13.01.2022): 1–17. http://dx.doi.org/10.1155/2022/2226565.
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With the continuous promotion of industrialization and urbanization, China's environmental pollution is becoming increasingly serious, which has caused considerable damage to the natural balance. Air pollution seriously harms people's physical and mental health, the ecological environment, and the social sustainable development of society. In this study, the backward trajectory model and multifractal methods were adopted to analyze air pollution in Zhengzhou. The backward trajectory analysis showed that most clusters of air pollution were from southern Hebei, eastern Shandong, and mid-western Henan, which were then transported to Zhengzhou. For the PSCF and CWT analyses, we selected four representative cities to explore how close the air pollution of Zhengzhou is to other areas on the basis of air polluted concentration. The results of several multifractal methods indicated that multifractality existed in the AQI time series of Zhengzhou and cross-correlations between Zhengzhou and each of the four cities. The widths of multifractal spectra showed that the air pollution in Zhengzhou was closest to that in Jinan, followed by Shijiazhuang, Zibo, and Luoyang. The CDFA analysis showed that carbon monoxide (CO), nitrogen dioxide (NO2), and inhalable particulate matter (PM10) had important influences on air pollution in Zhengzhou. These findings offer a useful reference for air pollution sources and their potential contributions in Zhengzhou, which can support policy makers in environmental governance and in achieving sustainable urban development.
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Liu, Ruiliang, A. Mark Pollard, Jessica Rawson, Xiaojia Tang, Peter Bray und Changping Zhang. „Panlongcheng, Zhengzhou and the Movement of Metal in Early Bronze Age China“. Journal of World Prehistory 32, Nr. 4 (27.11.2019): 393–428. http://dx.doi.org/10.1007/s10963-019-09137-w.
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AbstractThe role of Panlongcheng—a walled settlement on the Yangtze River with obvious links to the Erligang capital at Zhengzhou, ~ 500 km to the north—in early Bronze Age China has been the subject of much debate. Panlongcheng is a typical Erligang site (~ 1500–1300 BC), with evidence for people of elite status, unlike any other site apart from Zhengzhou itself. The tombs and bronzes at Panlongcheng, as well as other materials, closely resemble those at Zhengzhou. Why was Panlongcheng established along the Yangtze River, and what were the Erligang elites doing there? Considering the rich copper deposits in this area, it is widely assumed that the major function of Panlongcheng was to ship metal to Zhengzhou, and in return to receive bronze vessels from Zhengzhou. The purpose of this paper is to revisit this discussion through a re-evaluation of the scientific data on the bronzes from each site. A series of differences and similarities in the chemical and isotopic compositions of the metal objects at Panlongcheng and Zhengzhou are identified, suggesting that the relationship was more complex than was previously thought. In this light, despite a close social and presumably political affiliation with Zhengzhou, Panlongcheng appears likely to have had its own metal-casting capability, rather than having to rely completely on finished objects imported from Zhengzhou. This discovery encourages scholars to re-consider the metal supply network and the underlying political landscape in early dynastic China, shifting from a linear model to a complex but probably more realistic one.
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Editorial, E. „Corrigendum: Thermal performance experiment and numerical simulation of micro-PCM cement mortar composite wall“. Thermal Science, Nr. 00 (2023): 251. http://dx.doi.org/10.2298/tsci231124251e.
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Simeon Oka, Editor-in-Chief Emeritus of the journal Thermal Science request that it is, due to request of the authors, necessary to correct affiliations of the author THERMAL PERFORMANCE EXPERIMENT AND NUMERICAL SIMULATION OF MICRO-PCM CEMENT MORTAR COMPOSITE WALL by +School of Civil Engineering, Zhengzhou University of Industrial Technology, Zhengzhou, China Original scientific paper https://doi.org/10.2298/TSCI2304013L published in the journal Thermal Science, Year 2023, Vol. 27, No. 4A, pp. 3013-3028 since by the request of the author, AFFILIATION of the author must be changed. Instead of: School of Civil Engineering, Zhengzhou University of Industrial Technology, Zhengzhou, China has to be written: School of Economics and Management, Hebi Institute of Engineering and Technology, Henan Polytechnic University, Hebi, China <br><br><font color="red"><b> Link to the corrected article <u><a href="http://dx.doi.org/10.2298/TSCI2304013L">10.2298/TSCI2304013L</a></b></u>
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Li, Junqiang, Yueyue Yuan, Yuxi Jiang, Wen Wang, Liqin Chao, Ruiqin Sun, Jun Li, Md Robiul Karim und Meng Qi. „Molecular identification and subtyping of Blastocystis sp. in laboratory rats in China“. Parasite 27 (2020): 35. http://dx.doi.org/10.1051/parasite/2020035.
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Blastocystis sp. is a ubiquitous protist that has been frequently reported in humans and animals worldwide. A total of 355 fecal samples of experimental rats were collected from four laboratory rearing facilities in China, and Blastocystis sp. was detected by PCR amplification of the partial small subunit ribosomal (SSU) rRNA gene. Twenty-nine (8.2%, 29/355) samples were positive for Blastocystis sp., with the highest infection rate (20.7%, 24/116) in rats of the Zhengzhou1, followed by that in the Zhengzhou2 (5.0%, 2/40), Shenyang (3.0%, 3/100) and Wuhan (0) rearing facilities. Among the three rat strains, Sprague–Dawley (SD) rats had higher infection rates (11.3%, 17/151) compared to Wistar rats (8.7%, 9/104) and spontaneously hypertensive (SH) rats (3.0%, 3/100). Two Blastocystis sp. subtypes (ST4 and ST7) were identified. ST4 was the predominant subtype detected in 26 samples (89.7%). A phylogenetic analysis demonstrated that the sequences of ST4 and ST7 obtained in this study were clustered with their reference subtypes. To our knowledge, this is the first report of Blastocystis sp. in experimental rats in China. Pathogen infections in laboratory animals need to be monitored due to fecal-oral transmission.
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Huili, Gong, Li Menlou und Hu Xinli. „Management of groundwater in Zhengzhou City, China“. Water Research 34, Nr. 1 (Januar 2000): 57–62. http://dx.doi.org/10.1016/s0043-1354(99)00141-4.
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Liu, Chang, Yongge Hu, Assemgul Taukenova, Guohang Tian und Bo Mu. „Identification of Wetland Conservation Gaps in Rapidly Urbanizing Areas: A Case Study in Zhengzhou, China“. Land 12, Nr. 1 (10.01.2023): 221. http://dx.doi.org/10.3390/land12010221.
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Exploring protected area (PA) siting from a biodiversity perspective is critical in mitigating human impacts on ecosystems. This paper used the MaxEnt model to predict the geographic distribution patterns of wetland species in Zhengzhou and the environmental factors affecting species’ habitat selection. Environmental variables were screened by correlation analysis to avoid affecting the prediction results due to overfitting of the model. The AUC value of the training set of the model ROC curve was above 0.8, and the prediction accuracy was high. The prediction results showed that the only nature reserve in Zhengzhou, Yellow River Wetland Nature Reserve, currently covers only 10.25% of the total area of the high suitability areas for plants and 17.54% of the high suitability habitat areas for waterfowl in the whole area of Zhengzhou. The potential suitability areas of wetland species outside the reserve can provide a basis for site selection for wetland conservation planning in Zhengzhou. It was found that the geographic distribution of wetland species in Zhengzhou is constrained by the distribution of water bodies, bioclimatic variables, land cover, and population density.
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Li, Jingzhong, Xiao Xie, Bingyu Zhao, Xiao Xiao, Jingxin Qiao und Wanxia Ren. „Identification of Urban Functional Area by Using Multisource Geographic Data: A Case Study of Zhengzhou, China“. Complexity 2021 (30.03.2021): 1–10. http://dx.doi.org/10.1155/2021/8875276.
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The rational allocation of functional areas is the foundation for addressing the sustainable development of cities. Efficient and accurate identification methods of urban functional areas are of great significance to the adjustment and testing of urban planning and industrial layout optimization. Firstly, by employing multisource geographic data, an identification method of urban functional areas was developed. A quantitative measurement approach of the urban functional area was then established considering the comprehensive effects of human-land, space-time, and thematic information to present the covering area of ground objects, public awareness, and empirical research. Finally, the Zhengzhou city, which locates in Henan province of central China, was used to test the method. The results show that the developed method is efficient, accurate, and universal and can identify urban functional areas quickly and accurately. We found that the overall distribution of Zhengzhou’s functional areas presents a spatial pattern of single and multimixed coordinated development. The city’s commercial functional areas and commercial-based mixed functional areas are located in the city’s central area. The green square’s function area occupies relatively low and is mainly distributed in the city’s fringe.
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Wang, Zijian. „Extreme rainfall forecasting based on wavelet analysis and M-K test“. Highlights in Science, Engineering and Technology 60 (25.07.2023): 283–94. http://dx.doi.org/10.54097/hset.v60i.10536.
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In recent years, many places in China have encountered extremely rare heavy rainfall weather, and the north has also encountered rare blizzard weather, which poses a serious threat to the personal and property safety of local people. On July 20th, 2021 , with the maximum hourly rainfall reaching 201.9 mm, Zhengzhou suffered the extremely heavy rainfall once in a thousand years. The 7.20 heavy rain in Zhengzhou caused many communities and roads in Zhengzhou to be flooded by the rain and thus drew attention to and recognized the extraordinary precipitation. In this paper, a correlation analysis is made on the interannual variation of precipitation characteristics in Zhengzhou area, and concrete quantitative analysis is made on flood events; In addition, the characteristics and losses of precipitation in Shaanxi and Zhengzhou are compared Finally, put forward the long-term planning and construction of cities under the condition of extreme heavy rainfall in the future.
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Walton, Linda. „The “Spirit” of Confucian Education in Contemporary China: Songyang Academy and Zhengzhou University“. Modern China 44, Nr. 3 (13.12.2017): 313–42. http://dx.doi.org/10.1177/0097700417744165.
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The recent reincarnation of Songyang Academy, one of the “Four Great Academies” of the Northern Song dynasty, is an example of “academy fever” 书院热 in China today. Along with nearby Shaolin Temple, the academy has become a site for cultural heritage tourism in northwestern Henan. In addition to its attraction as a tourist destination, however, Songyang Academy has also been appropriated by neighboring Zhengzhou University as an auxiliary Confucian campus. Focusing on its relationship with Zhengzhou University, this article considers Songyang Academy’s restoration in the context of current debates in China about modern university education, Confucianism, and “national studies” ( guoxue 国学). The Zhengzhou University–Songyang Academy partnership provides a concrete, if ambivalent, example of cultural governance in action, as provincial Communist Party officials and university administrators collaborate to produce a national studies curriculum rooted in their vision of Confucian pedagogy.
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Dang, Lei, und Soobong Kim. „An Analysis of the Spatial and Temporal Evolution of the Urban Heat Island in the City of Zhengzhou Using MODIS Data“. Applied Sciences 13, Nr. 12 (10.06.2023): 7013. http://dx.doi.org/10.3390/app13127013.
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A rapid increase in urbanization has caused severe urban heat island (UHI) effects in China over the past few years. Zhengzhou is one of the emerging cities of China where residents are facing strong impact of UHI. By utilizing MODIS data on land surface temperature (LST) and employing 3S technology, this study investigates the UHI phenomenon in Zhengzhou over a 10-year period (2012–2021), aiming to analyze the spatio-temporal evolution characteristics of the UHI effect and the associated land cover changes. To the best of our knowledge, this study represents the first attempt to investigate annual and seasonal changes in different areas of Zhengzhou. It is noted that in the night-time, the intensity of the heat island is stronger than in daytime, which has moderate and weak heat island areas. Seasonal variation showed that in autumn, Zhengzhou has the strong heat island intensity, followed by summer, and the lowest is in winter and spring. The analysis reveals that built-up (construction) areas exhibit the highest LST, whereas forested land and water bodies have the lowest temperature levels. The findings of this study can serve as reference for reducing UHI and increasing thermal comfort in cities.
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Zhao, Xiuyan, und Changhong Miao. „Spatial-Temporal Changes and Simulation of Land Use in Metropolitan Areas: A Case of the Zhengzhou Metropolitan Area, China“. International Journal of Environmental Research and Public Health 19, Nr. 21 (28.10.2022): 14089. http://dx.doi.org/10.3390/ijerph192114089.
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Metropolitan areas are the main spatial units sustaining development. Investigating internal factor changes in metropolitan areas are of great significance for improving the quality of development in these areas. As an emerging national central city of China, Zhengzhou has experienced rapid urban expansion and urbanization. In this study, principal component analysis and the model and Geodetector model were used to comprehensively analyze the influencing factors of land use change in Zhengzhou from 1980 to 2015. Based on the CA–Markov model, we improved the accuracy of multi-criteria evaluation of suitability factors and simulated land use change in 2015. The results show that land use conversions in the study area between 1980 and 2015 were frequent, with the areas of farmland, woodland, grassland, water, and unused land decreasing by 5.00%, 17.12%, 21.59%, 18.31%, and 94.48%, respectively, while construction land increased by 53.61%. The key influences on land use change are the urbanization and growth of residential or non-agricultural populations. In 2035, the area of farmland in the study area will decrease by 11.09% compared with that in 2015 and construction land will increase by 38.94%, while the area of other land use types will not significantly change. Zhengzhou, as the center city, forms a diamond-shaped core development area of Zhengzhou–Kaifeng–Xinxiang–Jiaozuo, while Xuchang is considered an independent sub-center uniting the surrounding cities for expansion. With its radiation power of unipolar core development for many years and the developmental momentum of Zhengzhou–Kaifeng integration, Zhengzhou city jointly drives the economic development of the surrounding cities. The protection of farmland and control of the expansion of construction land are the major challenges for the Zhengzhou metropolitan area to achieve sustainable development.
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Yang, Hao, Linshuang Zhao und Jun Chen. „Metro System Inundation in Zhengzhou, Henan Province, China“. Sustainability 14, Nr. 15 (29.07.2022): 9292. http://dx.doi.org/10.3390/su14159292.
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In this study, we investigated the flooding accident that occurred on Metro Line 5 in the capital city of Zhengzhou, Henan Province, China. On 20 July 2021, owing to an extreme rainstorm, serious inundation occurred in the Wulongkou parking lot of Zhengzhou Metro Line 5 and its surrounding area. Flooding forced a train to stop during operation, resulting in 14 deaths. Based on our preliminary investigation and analysis of this accident, we designed three main control measures to reduce the occurrence of similar accidents and mitigate the impact of similar accidents in the future, given the increasing number of extreme storm weather events in recent years: (1) to conduct subway flood risk assessments and to establish an early warning system, involving real-time monitoring of meteorological information during subway operation and construction; (2) to improve subway flood control emergency plans and to establish a response mechanism for subway flooding; and (3) to strengthen safety awareness training to ensure the orderly evacuation of people after accidents.
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Cui, J., Z. Q. Wang, F. Wu und X. X. Jin. „An outbreak of paragonimiosis in Zhengzhou city, China“. Acta Tropica 70, Nr. 2 (Juni 1998): 211–16. http://dx.doi.org/10.1016/s0001-706x(98)00024-2.
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Ma, Chuanming, Wu Yan, Xinjie Hu und Heng Kuang. „Geo-environment risk assessment in Zhengzhou City, China“. Geomatics, Natural Hazards and Risk 11, Nr. 1 (27.12.2019): 40–70. http://dx.doi.org/10.1080/19475705.2019.1701571.
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Gao, Zongyu. „Zhengzhou Yellow River road-cum-railway bridge, China“. Stahlbau 81, Nr. 2 (Februar 2012): 151–55. http://dx.doi.org/10.1002/stab.201201522.
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Zheng, Hui-Fan, Yin-Long Chen, Xiao-Wei Fan und Guo-Ji Tian. „A heat pipe solar collector system for winter heating in Zhengzhou city, China“. Thermal Science 21, Nr. 4 (2017): 1771–76. http://dx.doi.org/10.2298/tsci151229067z.
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A heat pipe solar collector system for winter heating is investigated both experimentally and theoretically. The hourly heat collecting capacity, water temperature and contribution rate of solar collector system based on Zhengzhou city typical sunshine are calculated. The study reveals that the heat collecting capacity and water temperature increases initially and then decreases, and the solar collector system can provide from 40% to 78% heating load for a 200 m2 villa with in Zhengzhou city from November to March.
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Faisal, Muhammad, Zening Wu, Huiliang Wang, Zafar Hussain und Muhammad Imran Azam. „Human Health Risk Assessment of Heavy Metals in the Urban Road Dust of Zhengzhou Metropolis, China“. Atmosphere 12, Nr. 9 (17.09.2021): 1213. http://dx.doi.org/10.3390/atmos12091213.
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The goal of this research is to assess hazardous heavy metal levels in PM2.5 fractioned road dust in order to quantify the risk of inhalation and potential health effects. To accomplish this, Inductively Coupled Plasma Mass Spectroscopy (ICP-MS) was used to determine concentrations of eight heavy metals (Cr, Cu, Ni, Zn, Cd, As, Pb, and Hg) in the PM2.5 portion of road dust samples from five different land use areas (commercial, residential, industrial, parks, and educational) in Zhengzhou, China. The following were the average heavy metal concentrations in the city: Cr 46.26 mg/kg, Cu 25.13 mg/kg, Ni 12.51 mg/kg, Zn 152.35 mg/kg, Cd 0.56 mg/kg, As 11.53 mg/kg, Pb 52.15 mg/kg, and Hg 0.32 mg/kg. Two pollution indicators, the Pollution Index (PI) and the Geoaccumulation Index (Igeo), were used to determine the degree of contamination. Both PI and Igeo indicated the extreme pollution of Hg and Cd, while PI also ranked Zn in the extreme polluted range. The US Environmental Protection Agency (USEPA) model for adults and children was used to estimate health risks by inhalation. The results identified non-carcinogenic exposure of children to lead (HI > 0.1) in commercial and industrial areas. Both children and adults in Zhengzhou’s commercial, residential, and park areas are exposed to higher levels of copper (Cu), lead (Pb), and zinc (Zn).
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Lee, Wei-Chi Wang, Yan Ye und Tze-Shang Cheng. „TEACHERS’ PERCEPTION TOWARDS ORGANIZATIONAL CLIMATE AT A BILINGUAL LANGUAGE PRIMARY SCHOOL IN ZHENGZHOU, CHINA“. EUrASEANs: journal on global socio-economic dynamics, Nr. 6(43) (30.11.2023): 553–66. http://dx.doi.org/10.35678/2539-5645.6(43).2023.553-566.
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This study mainly aimed to identify the teachers’ demographic factors, to determine the level of teachers’ perception of the school climate, and to compare their perception according to their demographic factors including teachers’ gender, educational level, years of service, position. A total of 120 teachers from a private primary school in Zhengzhou were surveyed through questionnaire based on Tagurri’s (1968) school organizational climate theory.
The study found that the level of teachers’ perception of the school climate was “relatively high”. Though there was no significant difference in teachers’ perception towards school climate according to their gender at the selected school, significant differences in teachers’ perception towards school climate according to their educational levels, years of service and positions existed. Teachers with high educational levels had more positive perceptions towards the school climates at the selected school in Zhengzhou, China. Teachers with more than 15 years of service had the most positive perceptions towards the school climates at the selected school. Teachers with high administrative positions had more positive perceptions towards the school climates at the selected school in Zhengzhou, China.
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Wang, Jing, Wei Su und Cheng Cai Liu. „Analysis on the Present Condition of Typical Buildings in Urban Villages in Zhengzhou“. Advanced Materials Research 598 (November 2012): 211–14. http://dx.doi.org/10.4028/www.scientific.net/amr.598.211.
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The safety survey on the urban village buildings in Zhengzhou shows that many reasons have caused the hidden dangers in the safety and reliability of the urban village buildings. Based on our survey data, this paper aims at providing theoretical references for the remolding and reinforcement of the urban village buildings and the future construction of the New Village in China, with an appraisement and an mastery on the safety and reliability of the typical buildings in urban villages in Zhengzhou.
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Han, Han, Huimin Li und Kaize Zhang. „Urban Water Ecosystem Health Evaluation Based on the Improved Fuzzy Matter-Element Extension Assessment Model: Case Study from Zhengzhou City, China“. Mathematical Problems in Engineering 2019 (29.01.2019): 1–14. http://dx.doi.org/10.1155/2019/7502342.
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The urban water ecosystem is a core foundation for the urban construction of ecological civilization. Ecosystem health is directly related to the economic development of the region and the quality of urban residents’ lives. Evaluating the health state of an urban water ecosystem is an important prerequisite for the construction of an ecologically civilized city. This study used Zhengzhou City in China as research area. Firstly, a Pressure-State-Response (PSR) model was used to construct an urban water ecosystem evaluation index system. Secondly, after analyzing the deficiency of traditional fuzzy matter-element extension model in urban water ecosystem health assessment, an improved fuzzy matter-element extension assessment model (FMEAM) was constructed by introducing the variable weight theory. Finally, using the proposed model above and the data from 2007 to 2016, this study evaluated the water ecosystem health status of Zhengzhou based on water ecosystem health integrated index (WHI). The results showed that the state of the urban water ecosystem in Zhengzhou generally improved during the study period. However, the overall level still remained low and retained an unhealthy state throughout the timeframe. The pressure on the Zhengzhou water ecosystem mainly originates from the increasing urbanization rate, the increased consumption of ecological environmental resources, and household water. Corresponding countermeasures in Zhengzhou have achieved certain results, and the health of the state’s subsystem and response subsystem has improved. However, it remains necessary to further strengthen the protection of the ecological environment, particularly with respect to water resources.
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Wang, Lirong, Gengrui Zhu und Weichao Fang. „PEACH GERMPLASM AND BREEDING PROGRAMS AT ZHENGZHOU IN CHINA“. Acta Horticulturae, Nr. 592 (November 2002): 177–82. http://dx.doi.org/10.17660/actahortic.2002.592.25.
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Fan, Hao, Chuanfeng Zhao, Zhanshan Ma und Yikun Yang. „Atmospheric inverse estimates of CO emissions from Zhengzhou, China“. Environmental Pollution 267 (Dezember 2020): 115164. http://dx.doi.org/10.1016/j.envpol.2020.115164.
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Junfeng, Chen, Wu Le, Zhou Yiqi, Hua Fucai und Zhong Maohua. „Lessons and improvements: Subway waterlogging catastrophe in Zhengzhou, China“. Tunnelling and Underground Space Technology 144 (Februar 2024): 105541. http://dx.doi.org/10.1016/j.tust.2023.105541.
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Gong, Ruishan, und Naif R. Alrehaili. „Flood Preparedness in United Kingdom and China: A Comparison Study Focusing on Social and Economic Factors“. International Journal of Disaster Management 5, Nr. 3 (27.02.2023): 181–92. http://dx.doi.org/10.24815/ijdm.v5i3.28854.
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The paper aims to explore the social and economic factors influencing the flood preparedness of Zhengzhou, China and Leeds, United Kingdom residents. As one of the chosen areas, Zhengzhou experienced a terrible flood with an inaccurate weather forecast and little pre-flood preparedness in July 2021. On the other hand, Leeds has a long history of frequent floods. Wetter winters and stormy weather caused by climate change led to increased floods in Leeds. The consistent seasonal floods keep damaging residents and their properties, leading to economic losses. The authors conducted semi-structured interviews with residents who experienced floods in Zhengzhou and Leeds. Comparative parameters included economic and social, as these factors are hugely different in the study areas. The results showed that factors like education influence the households’ flood preparedness; likewise, economic factors like disposable income also affect the willingness of residents to spend on flood preparedness. Furthermore, the results revealed that with proactive flood management, both communities progressed in minimising the post-adverse effects of floods.
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Yang, Z., und Q. Wang. „MINING METHOD OF TRAFFIC IMPACT AREAS OF RAINSTORM EVENT BASED ON SOCIAL MEDIA IN ZHENGZHOU CITY“. International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-3/W1-2022 (27.10.2022): 79–86. http://dx.doi.org/10.5194/isprs-archives-xlviii-3-w1-2022-79-2022.
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Abstract. Due to the influence of typhoon "fireworks" on July 20, 2021, there was a rare heavy rainfall in Zhengzhou, Henan Province, China, which caused severe urban waterlogged disasters and casualties. Take it as an example, using Web Crawler technology to obtain Weibo’s (Chinese Twitter) time and space data involved in the rare heavy rainfall in Zhengzhou. Through statistical analysis and spatiotemporal analysis to filter, classify, analyse and manipulate the crawled Weibo’s data, and then study the influence of the extreme rainstorm weather on the traffic areas from two aspects of address points and road networks. At the same time, to verify the effectiveness of the social media-based method for mining the traffic impact areas of the Zhengzhou extreme rainstorm, this experiment compares Weibo data with official data in various aspects according to four categories of waterlogging severity.
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Liu, Xun, Peng Zhou, Yichen Lin, Siwei Sun, Hailu Zhang, Wanqing Xu und Sangdi Yang. „Influencing Factors and Risk Assessment of Precipitation-Induced Flooding in Zhengzhou, China, Based on Random Forest and XGBoost Algorithms“. International Journal of Environmental Research and Public Health 19, Nr. 24 (09.12.2022): 16544. http://dx.doi.org/10.3390/ijerph192416544.
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Due to extreme weather phenomena, precipitation-induced flooding has become a frequent, widespread, and destructive natural disaster. Risk assessments of flooding have thus become a popular area of research. In this study, we studied the severe precipitation-induced flooding that occurred in Zhengzhou, Henan Province, China, in July 2021. We identified 16 basic indicators, and the random forest algorithm was used to determine the contribution of each indicator to the Zhengzhou flood. We then optimised the selected indicators and introduced the XGBoost algorithm to construct a risk index assessment model of precipitation-induced flooding. Our results identified four primary indicators for precipitation-induced flooding in the study area: total rainfall for three consecutive days, extreme daily rainfall, vegetation cover, and the river system. The Zhengzhou storm and flood risk evaluation model was constructed from 12 indicators: elevation, slope, water system index, extreme daily rainfall, total rainfall for three consecutive days, night-time light brightness, land-use type, proportion of arable land area, gross regional product, proportion of elderly population, vegetation cover, and medical rescue capacity. After streamlining the bottom four indicators in terms of contribution rate, it had the best performance, with an accuracy rate reaching 91.3%. Very high-risk and high-risk areas accounted for 11.46% and 27.50% of the total area of Zhengzhou, respectively, and their distribution was more significantly influenced by the extent of heavy rainfall, direction of river systems, and land types; the medium-risk area was the largest, accounting for 33.96% of the total area; the second-lowest-risk and low-risk areas together accounted for 27.09%. The areas with the highest risk of heavy rainfall and flooding in Zhengzhou were in the Erqi, Guanchenghui, Jinshui, Zhongyuan, and Huizi Districts and the western part of Xinmi City; these areas should be given priority attention during disaster monitoring and early warning and risk prevention and control.
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Liu, Xiaoyin. „Comparing the Views on Problem-Based Learning from Medical Education Students in Zhengzhou University in China and the University of Bristol in the UK“. International Education Studies 14, Nr. 1 (26.12.2020): 28. http://dx.doi.org/10.5539/ies.v14n1p28.
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Problem-based learning (PBL), as a student-centred learning method, refers to students actively participating in a group scenario to solve open-end problems. This study aims to compare the students’ attitudes on PBL in Zhengzhou University and the University of Bristol. This study adopts qualitative methods. By conducting semi-structured interviews with eight participants, four from Zhengzhou University and the others from the University of Bristol. Overall, the results of the study indicated that students from both two universities are overall satisfied with PBL because of its contribution to deeper understanding of medical knowledge and skill development and they all think that the quality of group discussion and the efficiency of PBL classes need to be improved. In terms of the different views from two universities, when it comes to the biggest benefit of PBL, students from Zhengzhou University are more likely to choose clinical thinking, while students from the University of Bristol are more satisfied with the deep understanding on medical knowledge. Unexpectedly, although Zhengzhou University has implemented PBL for fewer years than the University of Bristol, students are more satisfied with and motivated in PBL classes than those of the University of Bristol.
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Wen, Guangchao, Bingjie Wu, Lin Wang, Xiaohe Wang und Hongbo Xie. „Analysis of Eco-Environmental Geological Problems and Their Driving Forces in the Henan Section of the Yellow River Basin, China“. Sustainability 15, Nr. 8 (18.04.2023): 6818. http://dx.doi.org/10.3390/su15086818.
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(1) Background: The Henan section of the Yellow River Basin plays an important role in the economic zone of the middle reaches of the Yellow River. However, ecological environmental geological problems such as soil erosion have seriously affected the lives of residents and economic development, resulting in increasingly prominent conflicts between humans and the environment. Therefore, this paper made use of remote sensing images and other reference data, integrated image classification, remote sensing inversion and statistical analysis methods to explore the ecological environmental geological problems and their causes in the Henan section of the Yellow River Basin. (2) Results: the main eco-environmental geological problems in the Sanmenxia–Zhengzhou section are serious soil erosion, degradation of water conservation function and being prone to geological disasters. The main eco-environmental geological problems in the Zhengzhou–Puyang section are poor water and soil conservation function, degradation of water conservation function and poor biodiversity maintenance function. In the last 19 years, the eco-environmental geological problems in the Henan section of the Yellow River Basin have shown a significant improvement trend as a whole. Along the main stream of the Yellow River in Sanmenxia, Luoyang, Jiyuan, Jiaozuo, Zhengzhou and other areas, the eco-environmental geological problems are still prominent; altitude, vegetation and rainfall are the key driving factors of eco-environmental geological problems in the Sanmenxia–Zhengzhou section and rainfall, vegetation and land-use type are the key driving factors in the Zhengzhou–Puyang section. (3) Conclusions: This study comprehensively considered the three aspects of ecology, environment and geology in a total of five research topics. The temporal and spatial distribution characteristics and driving factors of ecological environmental geological problems in the Yellow River Basin were analyzed, which could provide technical support for ecological environmental protection and high-quality development in the Yellow River Basin.
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Wu, Zhengwang, und Jingyi Ye. „Research on public perception and participation in the relic park——taking Zhengzhou Shang Dynasty city wall relic park as example“. E3S Web of Conferences 165 (2020): 04058. http://dx.doi.org/10.1051/e3sconf/202016504058.
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The city wall relic park in Zhengzhou is a city park built on the Shang Dynasty city Wall site. As Zhengzhou is chosen as the eighth ancient capital of China, it is gradually recognized by the public. However, due to the lack of protection, development and utilization of the site, the historical value and cultural value of the Shang Dynasty Wall in Zhengzhou have not been fully shown. The construction of the city wall relic park is related to the soft inheritance and protection of the historical heritage. The spiritual inheritance of the historical heritage mainly depends on the spiritual transmission of the public. The public has the most direct feeling and understanding of it, so it is necessary to introduce public participation. In this paper, the scientific evaluation method Post Occupancy Evaluation (POE) is used to discuss the problem found by the public when using the city wall space. Suggestions and public participation strategies are given on the construction of the city wall relic park. We need to think about if there is public participation in the site now and how to let the public participate in planning, construction and management of the relic park. In order to make the city wall become the city’s leisure living room, to build the brand of Zhengzhou, and make it famous across the whole country, it’s urgent to put forward countermeasures for the development problem of Zhengzhou.
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Deng, Yun Chao, Pei Wen Hao und Lei He. „Study on Capillarity Water Rise in Subgrade Soil“. Advanced Materials Research 250-253 (Mai 2011): 1702–6. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.1702.
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Many highways in China cross irrigation area of farm land. The water in rivers and ponds by two sides of roads can flush back into subgrade, and results in more water in subgrade soil, subgrade deformation and lowered capacity. With reconstruction and extension of Zhengzhou-Luohe segment in Jing–Zhu Highway as the research target, this study investigated the method for preventing underground water from entering subgrade. Through studying on capillarity water rise in typical soil of Zhengzhou–Luohe segment, we found out water rise pattern, predicted capillarity water rise and obtained the method for preventing capillarity water from rising into subgrade.
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Zhao, Xiaofan, Huimin Li, Qin Cai, Ye Pan und Ye Qi. „Managing Extreme Rainfall and Flooding Events: A Case Study of the 20 July 2021 Zhengzhou Flood in China“. Climate 11, Nr. 11 (12.11.2023): 228. http://dx.doi.org/10.3390/cli11110228.
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On 20 July 2021, an extreme rainstorm battered Zhengzhou in China’s Henan Province, killing 302 people, including 14 individuals who drowned in a subway tunnel and 6 who drowned in a road tunnel. As the global climate warms, extreme weather events similar to the Zhengzhou flood will become more frequent, with increasingly catastrophic consequences for society. Taking a case study-based approach by focusing on the record-breaking Zhengzhou flood, this paper examines the governance capacity of inland cities in North China for managing extreme precipitation and flooding events from the perspective of the flood risk management process. Based on in-depth case analysis, our paper hypothesizes that inland cities in North China still have low risk perceptions of extreme weather events, which was manifested in insufficient pre-disaster preparation and prevention, poor risk communication, and slow emergency response. Accordingly, it is recommended that inland cities update their risk perceptions of extreme rainfall and flooding events, which are no longer low-probability, high-impact “black swans”, but turning into high-probability, high-impact “gray rhinos.” In particular, cities must make sufficient preparation for extreme weather events by revising contingency plans and strengthening their implementation, improving risk communication of meteorological warnings, and synchronizing emergency response with meteorological warnings.
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Li, Ya Li, und Yao Chen Qin. „Study on Dynamic Change of Carbon Emission in Zhengzhou“. Applied Mechanics and Materials 291-294 (Februar 2013): 1353–58. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.1353.
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In order to explore the impact of the fossil energy consumption,industrial production and population on regional carbon cycle , this paper estimated the dynamic changes of carbon emissions from 2000 to 2009 in Zhengzhou based on the quantitative emission model proposed by IPCC and ORNL. The results show that the total carbon emissions in Zhengzhou was 48944.2 ×104t during 2000~ 2009, among which 83.3% came from fossil fuel combustion,7.7% from industrial production process and 9% came from population. The carbon emissions of fossil energy consumption and industrial production increases gradually.The carbon emission of coal was the highest among all kinds of fossil fuels,occupying 97.1% of the total emission of fossil fuel consumption. The carbon emissions increase progressively and surpass the national average level from 2000 to 2009 in China. And the carbon emissions for 100 million yuan GDP is increasing.Finally, some measures are proposed for the carbon emission reduction in Zhengzhou
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Li, Bowei, Steven Sai Hang Ho, Sunling Gong, Jingwei Ni, Huairui Li, Liyan Han, Yi Yang, Yijin Qi und Dongxu Zhao. „Characterization of VOCs and their related atmospheric processes in a central Chinese city during severe ozone pollution periods“. Atmospheric Chemistry and Physics 19, Nr. 1 (16.01.2019): 617–38. http://dx.doi.org/10.5194/acp-19-617-2019.
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Abstract. A 5-month campaign (from May to September 2017) was conducted to characterize volatile organic compounds (VOCs) for the first time at four sites in Zhengzhou, Henan Province, China, where ground level ozone (O3) concentration has shown an increasing trend in recent years. Canister samples were collected for the measurement of 57 VOCs, which, along with reactive nitrogen oxides (NOx), are the most important O3 precursors. During the same period, O3 and its precursor gases were monitored online simultaneously. The results indicated that the average mixing ratio of total quantified VOCs (ΣVOCs=28.8±22.1 ppbv) in Zhengzhou was lower than that in the other Chinese megacities, while alkyne comprised a higher proportion of ΣVOCs. The abundances, compositions and ratios of typical VOCs showed clear spatial and temporal variations. Cluster analysis indicates that air masses from the south of Zhengzhou were cleaner than from other directions. The molar ratio of VOCs to NOx indicated that, in general, O3 formation was more sensitive to VOCs than NOx formation in Zhengzhou. The source apportionment was conducted with positive matrix factorization (PMF), and it was found that vehicle exhaust, coal and biomass burning and solvent usage were the major sources for ambient VOCs at all four sites. From potential source contribution function (PSCF) analysis, the strong emissions from coal + biomass burning and solvent usage were concentrated in the southwest of Shanxi and Henan provinces. This study gathers scientific evidence on the pollution sources for Zhengzhou, benefiting the government to establish efficient environmental control measures, particularly for O3 pollution.
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Xiao, Yuanyuan, Shuiqing Yin, Bofu Yu, Conghui Fan, Wenting Wang und Yun Xie. „The most extreme rainfall erosivity event ever recorded in China up to 2022: the 7.20 storm in Henan Province“. Hydrology and Earth System Sciences 27, Nr. 24 (20.12.2023): 4563–77. http://dx.doi.org/10.5194/hess-27-4563-2023.
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Abstract. Severe water erosion occurs during extreme storm events. Such an exceedingly severe storm occurred in Zhengzhou in central China on 20 July 2021 (the 7.20 storm). The magnitude and frequency of occurrence of this storm event were examined in terms of how erosive it was. To contextualize this extreme event, hourly rainfall data from 2420 automatic meteorological stations in China from 1951 to 2021 were analyzed to (1) characterize the spatial and temporal distribution of the rainfall amount and rainfall erosivity of the 7.20 storm, (2) evaluate the average recurrence interval of the maximum daily and event rainfall erosivity, and (3) establish the geographical distribution of the maximum daily and event rainfall erosivity in China. The center of the 7.20 storm moved from southeast to northwest in Henan Province, and the most intense period of rainfall occurred in the middle and late stages of the storm. Zhengzhou Meteorological Station happened to be aligned with the center of the storm, with a maximum daily rainfall of 552.5 mm and a maximum hourly rainfall intensity of 201.9 mm h−1. The average recurrence intervals of the maximum daily rainfall erosivity (43 354±1863 MJ mm ha−1 h−1) and the maximum event rainfall erosivity (58 874±2351 MJ mm ha−1 h−1) were estimated to be about 19 200 and 53 700 years, respectively, assuming the log-Pearson type-III distribution, and these were the maximum rainfall erosivities ever recorded among 2420 meteorological stations in mainland China up to 2022. The 7.20 storm suggests that the most erosive of storms does not necessarily occur in the wettest places in southern China, and these can occur in mid-latitude around 35∘ N with a moderate mean annual rainfall of 566.7 mm in Zhengzhou.
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Yu-Kun, Hou, Zhao Chun-Hui und Huang Yu-Chung. „A GIS-based water distribution model for Zhengzhou city, China“. Water Supply 11, Nr. 4 (01.09.2011): 497–503. http://dx.doi.org/10.2166/ws.2011.092.
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Many water companies in China are developing GIS as a computer-based tool, for mapping and analyzing objects and events that happen on a water distribution network. However, only a few companies have taken a further step to develop a hydraulic model based on GIS, and Zhengzhou Water Supply Corporation is one of them. The WaterGEMS V8 XM from Bentley is used to develop the hydraulic model for the water distribution network in Zhengzhou city, which has a population of over 3 million. During establishment of the model, some of the data extracted from GIS are missing, abnormal, and redundant and require careful screening, searching, and judging. Model calibration is performed after a sensitivity analysis. Peaking factor and pipe roughness coefficient are key model parameters to calibrate. In calibrating peaking factors, the distribution system is divided into 5 operation districts with different types of water usage. To calibrate pipe roughness coefficients, the system was divided into 4 water supply districts with different attributes of pipelines. Finally, a case study of pipe layout evaluation it shows the hydraulic model to be a powerful tool for water supply management.
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Wang, Jingyi, Caihong Hu, Bingyan Ma und Xiaoling Mu. „Rapid Urbanization Impact on the Hydrological Processes in Zhengzhou, China“. Water 12, Nr. 7 (30.06.2020): 1870. http://dx.doi.org/10.3390/w12071870.
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Changes in the hydrological process caused by urbanization lead to frequent flooding in cities. For fast-growing urban areas, the impact of urbanization on the hydrological process needs to be systematically analyzed. This study takes Zhengzhou as an example to analyze the impact of urbanization on the hydrological process based on 1971–2012 hourly rainfall-runoff data, combining Geographic Information Systems with traditional hydrological methods. Our study indicates that the rain island effect in different districts of city became stronger with the increase of its built-up. The uneven land use resulted in the difference of runoff process. The flood peak lag was 25–30% earlier with the change of land use. The change of flood peak increased by 10–30% with the change of built-up. The runoff coefficient increases by 20–35% with the increase of built-up, and its change increased with the change of land use. Affected by the rain island effect, precipitation tends to occur in areas where built-up is dominant, which overall magnifies the impact of urbanization on the hydrological process. This provides new ideas for urban flood control. Refine flood control standards according to regional land use changes to cope with the hydrological process after urbanization.
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SHEN, ZHAOBO, QING SHANG, YU TANG und RONG LI. „Mite specific IgE levels of asthmatic children in Zhengzhou, China“. Systematic and Applied Acarology 6 (31.07.2001): 3. http://dx.doi.org/10.11158/saa.6.1.1.
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Qin, Lijie, Jianqin Gu, Shijie Liang, Fang Fang, Weimin Bai, Xu Liu, Tao Zhao et al. „Seasonal association between ambient ozone and mortality in Zhengzhou, China“. International Journal of Biometeorology 61, Nr. 6 (15.12.2016): 1003–10. http://dx.doi.org/10.1007/s00484-016-1279-8.
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He, Li, Jian’ge Tao, Ping Meng, Dan Chen, Meng Yan und László Vasa. „Analysis of socio-economic spatial structure of urban agglomeration in China based on spatial gradient and clustering“. Oeconomia Copernicana 12, Nr. 3 (27.09.2021): 789–819. http://dx.doi.org/10.24136/oc.2021.026.
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Research background: Previous studies on the economic and social development of urban agglomerations mostly focus on a single primacy comparative analysis and efficiency evaluation. Spatial structure differentiation is an important feature of urban agglomeration. The lack of economic and social analysis on the spatial structure makes it impossible to determine the development positioning of each city in the urban agglomeration, which affects the sustainable economic devel-opment ability of these areas.
Purpose of the article: The objective of the article is to analyze the spatial development law and experience of urban agglomeration, this study explores the practice of economic and population spatial structure of city areas in China. For this purpose, CPUA and its central city Zhengzhou was taken as an example, the spatial gradient structure of example was analyzed.
Methods: Using economic and population data of 32 cities in this region, growth pole theory, and pole-axis theory, the economic and population spatial structure of urban agglomeration, the spatial gradient structure of central cities in urban agglomerations were analyzed with the method of cluster about radiation index.
Findings & value added: (1) In the process of the formation of CPUA, the geo-graphical spatial pattern plays a decisive role in economic and social development. This is an experience from developing countries. (2) CPUA presents a gradient development pattern with Zhengzhou as the center, and economic and social development gradually radiates to the metropolitan area, the core development area, and the character development demonstration area. (3) The economic and social gradients of Zhengzhou, the central city, present the hierarchy rules and characteristics which are driven by the Beijing-Guangzhou-Railway axis and the Longhai-Railway axis. (4) The central city of Zhengzhou still presents insufficient primacy in regional development, which shows that Zhengzhou accounts for 6% of the population of the Central Plains Economic Zone and 14% of GDP, and insufficient agglomeration. Different countries at different stages of economic development have different urban agglomeration development models. The conclusions from China provide new decision-making ideas and methods for spatial structure research and development strategy analysis of urban agglomerations.
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Li, Huawei, Sandor Jombach, Guohang Tian, Yuanzheng Li und Handong Meng. „Characterizing Temporal Dynamics of Urban Heat Island in a Rapidly Expanding City: A 39 Years Study in Zhengzhou, China“. Land 11, Nr. 10 (19.10.2022): 1838. http://dx.doi.org/10.3390/land11101838.
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Extreme heat wave weather phenomena have erupted worldwide in recent years. The urban heat island (UHI) effect has exacerbated urban heat waves with serious consequences for urban energy and residents’ health. Therefore, a better understanding of the dynamics of the UHI effect and the influencing factors is needed in the context of carbon neutrality and global warming. This study used long-term observation and statistical data to investigate the urban heat island intensity (UHII) over the past 39 years (1981–2019) and to analyze the temporal changes of the UHI effect and the relationship between the UHI effect and indicators of rapid urbanization in Zhengzhou, China. The results showed that Zhengzhou is warming 2.2-times faster than the global land warming trend of about +0.9 °C from 1981 to 2019. There is a clear phase characteristic of the heat island effect in Zhengzhou, and it offers a rapid upward trend after 2000 and a positive correlation with the urbanization process; it was found that the social and economic conditions of urban expansion in Zhengzhou have a significant relationship with UHII. We also found that the denser the urban built-up area, the more obvious the heat island effect. Compared with other countries, the influence of national policies on urban development is an indirect factor influencing the change of UHI specifically for Chinese cities. This research could provide a reference for understanding the temporal dynamics of UHI in an expanding large city for sustainable urban planning and mitigating urban warming and environmental problems.
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Du, Chenyu, Peihao Song, Kun Wang, Ang Li, Yongge Hu, Kaihua Zhang, Xiaoli Jia et al. „Investigating the Trends and Drivers between Urbanization and the Land Surface Temperature: A Case Study of Zhengzhou, China“. Sustainability 14, Nr. 21 (25.10.2022): 13845. http://dx.doi.org/10.3390/su142113845.
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The effect of urbanization on the urban thermal environment (UTE) has attracted increasing research attention because its significant effects on local weather and climate, and serious consequences for people. However, systematic study of the relationship between urbanization and UTE has been undertaken only to a limited extent. Using quantitative thermal remote sensing and multi-buffer ring method and multiple spatial scales method, here we analyze Landsat TM/ETM+ images of Zhengzhou in Central China acquired on four different dates in 2017 to investigate the spatiotemporal variations, trends, and driving force in the land surface temperature (LST). Our results showed that LST generally increased with urbanization intensity. This trend was extremely obvious in spring and summer, weak in winter, and slightly downward in autumn. Moreover, PLAND (e.g., percentage of impervious surface in a landscape) has the most significant effect on urban LST, and generally increases as the spatial scale becomes larger. In conclusion, the study recommends that urban planning in Zhengzhou should prioritize PLAND, especially at large spatial scales. These results provide a scientific reference for urban planners who are committed to the sustainable development of Zhengzhou City.
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Zhao, Kun, Xin Xu, Ming Xue, Zhe-Min Tan, Hao Huang, Ang Zhou, Xueqi Fan et al. „The Dynamics and Microphysical Characteristics of the Convection Producing the Record-Breaking Hourly Precipitation on 20 July 2021 in Zhengzhou, China“. Remote Sensing 15, Nr. 18 (13.09.2023): 4511. http://dx.doi.org/10.3390/rs15184511.
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An hourly rainfall of 201.9 mm fell in Zhengzhou on 20 July 2021, breaking the hourly rainfall record of mainland China and causing severe urban flooding and human casualties. This observation-based study investigates the associated convective-scale and mesoscale dynamics and microphysical processes using disdrometer and polarimetric radar observations aided by retrievals from the Variational Doppler Radar Analysis System. The synoptic flow forcing brought abundant moisture from the oceans and converged at Zhengzhou; then, the extreme rainfall was produced by a slow-moving convective storm that persisted throughout the hour over Zhengzhou. Unusually high concentrations of raindrops of all sizes (showing combined properties of maritime and continental convection) are revealed by the disdrometer data, whereas the polarimetric radar data suggest that both ice-based and warm rain processes were important contributors to the total rainfall. High precipitation efficiency was achieved with an erect updraft at the low levels, whereas enhanced easterly inflows kept the storm moving slowly. The interaction between convective-scale and mesoscale dynamics and microphysical processes within the favorable synoptic conditions led to this extremely heavy rainfall.
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Jia, Yizhen, und Han Wang. „Study on Water Resource Carrying Capacity of Zhengzhou City Based on DPSIR Model“. International Journal of Environmental Research and Public Health 20, Nr. 2 (12.01.2023): 1394. http://dx.doi.org/10.3390/ijerph20021394.
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Based on the driving force–pressure–state–impact–response (DPSIR) model, a comprehensive evaluation index system is constructed. The index weight is determined by the combination weighting method in combination with the data of 2010–2019. The TOPSIS model is used to comprehensively analyze the water resource carrying capacity of Zhengzhou as the central city in China with a developed economy and relatively short water resources. The study results are as follows. (1) During the sample period, the comprehensive evaluation value of water resources carrying capacity of Zhengzhou increases from 0.4183 in 2010 to 0.5560 in 2019, with an overall fluctuating rise. Simultaneously, the water resource carrying capacity grade improves from Grade III (normal carrying capacity) to Grade II (good carrying capacity). (2) The contribution of each subsystem to the comprehensive evaluation value increases year by year. Among them, S subsystem and I subsystem make the largest contribution to the comprehensive carrying capacity. R subsystem makes a relatively stable contribution to the overall carrying capacity. Affected by GDP growth rate and uneven temporal–spatial distribution of water resources in Zhengzhou, the D subsystem and P subsystem of water resource carrying capacities show the fluctuating change. Finally, based on the above conclusions, this paper puts forward the countermeasures and suggestions to improve the level of water resource carrying capacity of Zhengzhou.