Artykuły w czasopismach: „Water diversion”

1

HOGUE, CHERYL. "CLEAN WATER ACT DIVERSION?" Chemical & Engineering News 80, nr 47 (25.11.2002): 16–17. http://dx.doi.org/10.1021/cen-v080n047.p016.

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Wang, Dong, Yi Tian Li, Jin Yun Deng i Yun Ping Yang. "Study on Water and Sediment Diversion Variations in Songzikou after the Three Gorges Reservoir Storage". Applied Mechanics and Materials 353-356 (sierpień 2013): 2631–36. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.2631.

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Songzikou has the greatest diversion ratio among the three outlets at Jingjiang River. The water and sediment diversion ratios are changed after water storage of the Three Gorges Reservoir. The changing trends are critical for the evolution of the river-lake relationship. According to the water and sediment diversion data obtained from 2003 to 2010 in the Songzikou, it could be found that the water diversion ratios in the Songzikou under different Zhicheng flow are enhanced and its sediment diversion ratios also had an increasing trend after the Three Gorges Reservoir storage. The variations were mainly related to the water levels of main streams, the change of river regime and the diversion angle near the outlet. In addition, the changes were also associated with the evolution characteristics of outlet channel. We further studied how flood regulation of the Three Gorges Reservoir influenced the diversions of the Songzikou.

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Weigang, Xu, Yu Yilei, Yu Yilei, Ma Muyuan, Ma Muyuan, Guo Jia, Guo Jia i in. "Effects of Water Replenishment from Yellow River on Water Quality of Hengshui Lake Wetland". Journal of Plant and Animal Ecology 1, nr 1 (12.03.2018): 58–62. http://dx.doi.org/10.14302/issn.2637-6075.jpae-18-1937.

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Hengshui Lake Wetland is the only national wetland and bird nature reserve in the North China Plain. It plays an important role in maintaining the species diversity and ecological balance. In recent years, due to industrial and agricultural production, infrastructure and ecological environment construction and other reasons, the infiltration, runoff, evapotranspiration and other water balance elements was changed, which reduced runoff into the lake. In order to ease the tense water resources situation in the region, Hengshui Lake is replenished each year by Yellow River water. Although Diversion Yellow River Wetland has made direct water supply protection, but also affected the ecology and environment of Hengshui Lake wetlands. In order to understand how artificial water diversion can affect the ecological environment of natural lakes, this paper analyzes the effects of artificial water storage on the water quality of the lake by using the measured data of water samples in the lake. The results showed that the water level of Hengshui Lake showed an upward trend after the diversion from the Yellow River. Comprehensive pollution index showed a downward trend, but Hengshui Lake wetlands are still slightly polluted. Diversion of Yellow River diversion into the lake of the ecological health of Hengshui also caused some impact.

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Xu, Ruichen, Yong Pang, Zhibing Hu i John Paul Kaisam. "Dual-Source Optimization of the “Diverting Water from the Yangtze River to Tai Lake (DWYRTL)” Project Based on the Euler Method". Complexity 2020 (4.08.2020): 1–12. http://dx.doi.org/10.1155/2020/3256596.

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Appropriate water body diversion can improve the water quality of Tai Lake. Excessive diversion of water would, however, dramatically alter the local flow fields, which are not conducive to the growth of aquatic plants and the stability of ecosystems. The current “Diverting Water from the Yangtze River to Tai Lake (DWYRTL)” project uses a single water source, the Wangyu River, for diversion, a model that may significantly affect the nearby flow rate or uniformity of the lake and is not conducive to the long-term stability of the aquatic ecosystem in the Tai Lake district of the eastern part of the lake. In order to simulate the different situations of single- and dual-source water diversions (Wangyu-Xinmeng Rivers) in Tai Lake, we based this study on a three-dimensional hydrodynamic model coupled with the Euler method, which can accurately calculate the water exchange rates in the different districts of Tai Lake. The results show that (1) it is recommended that the total annual diversion of water should not exceed 20 × 108 m3; (2) the wind field is the most important factor determining the distribution of spatial water exchange; (3) under wind-free conditions, the flow rate of a single-source diversion of water is approximately 50% higher than that of dual-source diversion; and (4) water diversion under the prevailing conditions of the northwest wind in winter will reduce the semiexchange period of the eastern part of the lake area from 50 to 30 days, significantly changing the nearby district’s uniformity, leading to ecological risks. Therefore, it is recommended that the dual-source water diversion mode be used in winter and windless season, and single-source water diversion mode be used in other seasons.

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Wang, Fuqiang, Huan Yang, Heng Zhao i Pingping Kang. "Ecological effect evaluation of water diversion in the Yellow River delta wetland". Water Policy 20, nr 4 (6.06.2018): 744–57. http://dx.doi.org/10.2166/wp.2018.166.

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Abstract Ecological effect evaluation of water diversion is a difficult and long-term process requiring complex monitoring data and scientific evaluation method. Based on remote sensing data and the ecological investigation data of Yellow River delta, this study built a wetland ecology evaluation index system with the analytic hierarchy process (AHP) framework, which included 13 evaluation indices of three criteria as suitability, diversity, and functionality. Fuzzy-AHP comprehensive evaluation method was used to evaluate the ecological effect of water diversion at Diaokou River wetland restoration zone. The results show that the comprehensive evaluation index (CEI) of wetland ecology is 0.464 before water diversion, which belongs to the ‘poor’ level, while after five years of water diversion, the CEI increased to 0.737, which belongs to the ‘fine’ level. It represents that ecological water diversion has made prominent positive effects for the ecosystem of Diaokou River wetland restoration zone. The research result could give decision-makers a clear understanding about the ecological effect of wetland water diversion and provide scientific guidance for strategic decisions.

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Parsakhoo, Aidin, Akbar Mazri i Mohsen Mostafa. "Efficiency of some conservation treatments for soil erosion control on unallowable slopes of skid trails". Journal of Forest Science 66, No. 9 (29.09.2020): 368–74. http://dx.doi.org/10.17221/61/2020-jfs.

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The aim of this study was to determine the suitable conservation treatments to control water erosion from skid trails in ShastKalate forests. Two longitudinal slopes of 20-40% and > 40% were considered as critical slopes for skid trails. Treatments of water diversion ruts, water diversion ruts filled with slash and stones were implemented on each slope. A rubber bar was installed at the end of the slope to convert runoff into collectors. Sampling was done during rainfall events in autumn and winter seasons. Findings indicated that the treatment of water diversion ruts filled with slash was better than the other treatments in the control of sediment and soil loss, especially in the slope class of 20–40%. In the slope class of > 40%, there was not any significant difference between treatments in sediment and soil loss control, but generally water diversion ruts filled with slash and stones were better in soil erosion control than water diversion ruts. In both slope classes, the rainfall intensity of 0.11 mm·h<sup>–1</sup> (2.64 mm in 24 h) was the threshold of soil erosion on skid trails. The control of water erosion of soil on skid trails by the operation of water diversions is a suitable treatment for conserving skid trails.

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7

Derepasko, Diana, Felix Witing, Francisco J. Peñas, José Barquín i Martin Volk. "Towards Adaptive Water Management—Optimizing River Water Diversion at the Basin Scale under Future Environmental Conditions". Water 15, nr 18 (18.09.2023): 3289. http://dx.doi.org/10.3390/w15183289.

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The degree of success of river water diversion planning decisions is affected by uncertain environmental conditions. The adaptive water management framework incorporates this uncertainty at all stages of management. While the most effective form of adaptive management requires experimental comparison of practices, the use of optimization modeling is convenient for conducting exploratory simulations to evaluate the spatiotemporal implications of current water diversion management decisions under future environmental changes. We demonstrate such an explorative modeling approach by assessing river water availability for diversion in a river basin in Northern Spain under two future environmental scenarios that combine climate and land use change. An evolutionary optimization method is applied to identify and reduce trade-offs with Supporting Ecosystem Services linked to environmental flow requirements for relevant local freshwater species. The results show that seasonal shifts and spatial heterogeneity of diversion volumes are the main challenges for the future diversion management of the Pas River. Basin-scale diversion management should take into account the seasonal planning horizon and the setting of tailored diversion targets at the local-level to promote the implementation of adaptive management. The presented assessment can help with strategic placement of diversion points and timing of withdrawals, but it also provides deeper insight into how optimisation can support decision-making in managing water diversion under uncertain future environmental conditions.

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8

Davis, E., V. H. Remenda i E. K. Sauer. "Quality Degradation in Waters Undergoing Interbasin Transfer". Water Quality Research Journal 23, nr 3 (1.08.1988): 408–23. http://dx.doi.org/10.2166/wqrj.1988.030.

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Abstract The Saskatchewan River system is the main source of good quality water in the Western Interior Sedimentary Basin which forms the populated and agricultural area of the prairie region of Western Canada. Water from this river system has in the past been diverted at many points into local drainage areas where water shortages existed. It is expected that in the future more diversion schemes will be initiated to transport Saskatchewan River water to the water deficient areas of the Prairies. There is evidence that the quality of water flowing into diversion schemes utilizing existing drainage systems or glacial and proglacial drainage channels has been degraded from natural causes. Increases in mineral salts and phosphates, in some cases, has rendered the diverted water of little use for domestic, industrial and agricultural purposes. More diversions are in the feasibility and planning stages - many diversions may prove to be unacceptable if the inherent degradation potential of natural channels is understood. Alternative diversion routes and schemes which exclude the use of topographical low areas will have to be devised and investigations conducted on the degradation potential of the alternative routes.

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9

He, Wen Xue, Cha Qing Li i Dong Yun Chen. "Analysis of Water Diversion Way and Suitable Discharge Based on Water Environment Improvement Goal in the River Network". Advanced Materials Research 779-780 (wrzesień 2013): 1588–91. http://dx.doi.org/10.4028/www.scientific.net/amr.779-780.1588.

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One of the direct and effective ways to improve water environment of the river network is water diversion, because of the complex and changing about the river network, the safety of water diversion and the effect to improve water environment have been become the focus of attention. Through the analysis of diversion way and suitable discharge based on water environment improvement goal in the river network, the reasonable interval of the suitable discharge has been defined in the intermittent water diversion and continuous water diversion, the effect to improve the water environment has been further clarified, it is closely related with the water diversion way and discharge, the hydraulic characteristics of river networks should been emphasized to maximum, the self-purification capacity of river networks should be improved, the effectiveness for water diversion to improve the water environment must be continually strengthened.

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10

周, 研来. "Risk Analysis for Flood Control of Water Diversion and Recipient Reservoirs in Water Diversion Project". Journal of Water Resources Research 05, nr 02 (2016): 136–42. http://dx.doi.org/10.12677/jwrr.2016.52017.

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11

Wen, Fan, Mingxiang Yang, Wenhai Guan, Jixue Cao, Yibo Zou, Xuan Liu, Hejia Wang i Ningpeng Dong. "The Impact of Inter-Basin Water Transfer Schemes on Hydropower Generation in the Upper Reaches of the Yangtze River during Extreme Drought Years". Sustainability 15, nr 10 (22.05.2023): 8373. http://dx.doi.org/10.3390/su15108373.

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The Yangtze River Basin experiences frequent extreme heatwaves and prolonged droughts, resulting in a tight supply demand balance of electricity and negatively impacting socioeconomic production. Meanwhile, ongoing inter-basin water diversion projects are planned that will divert approximately 25.263 billion cubic meters of water from the Yangtze River Basin annually, which may further affect the power supply in the region. In this study, the CLHMS-LSTM model, a land-surface hydrological model coupled with a long short-term memory (LSTM)-based reservoir operation simulation model, is used to investigate the impact of water diversions on the power generation of the Yangtze River mainstream reservoirs under extreme drought conditions. Two different water diversion schemes are adopted in this study, namely the minimum water deficit scheme (Scheme 1) and minimum construction cost scheme (Scheme 2). The results show that the land surface–hydrological model was able to well characterize the hydrological characteristics of the Yangtze River mainstem, with a daily scale determination coefficient greater than 0.85. The LSTM reservoir operation simulation model was able to simulate the reservoir releases well, with the determination coefficient greater than 0.93. The operation of the water diversion projects will result in a reduction in the power generation of the Yangtze River mainstem by 14.97 billion kilowatt-hours. As compared to the minimum construction cost scheme (Scheme 2), the minimum water deficit scheme (Scheme 1) reduces the loss of power generation by 1.38 billion kilowatt-hours. The research results provide new ideas for the decision-making process for the inter-basin water diversion project and the formulation of water diversion plans, which has implications for ensuring the security of the power supply in the water diversion area.

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12

Adel, Miah M. "The background state leading to arsenic contamination of Bengal Basin groundwater". Journal of Water and Health 3, nr 4 (1.12.2005): 435–52. http://dx.doi.org/10.2166/wh.2005.053.

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The Bengal basin has the world's densest water diversion constructions on the natural courses of rivers. The most damaging water diversion construction is the Farakka Barrage upon the international River Ganges. The diversion of water through this barrage and other constructions upstream of it has reduced the Ganges flow rate by 2.5 times. The resulting downstream effects are the depletion of surface water resources, more withdrawal than recharge of groundwater, sinking groundwater table, spread in depth and extension of the vadose zone, changes in surface features, climatic changes, etc. An investigation was carried out to find the contributions of water diversion to the arsenic contamination of groundwater in the Bengal basin. The reasonable scenario for arsenic contamination is the oxygen deficiency in groundwater and aeration of arsenopyrites buried in the sediment that would remain under water prior to 1975. The mineral forms water-soluble compounds of arsenic when react with atmospheric oxygen. These soluble arsenic compounds infiltrates to the groundwater. This article summarizes the short-time and incomplete study-based quick conclusions reached by investigators that have totally avoided the vital issue of water diversion. It then shows the depleting condition of the water resources under continuing diversions, the generation of favorable condition for arsenic release, the reasons for low sulfur concentration, the reason for first contamination in the Hugly basin, and the hindrance to water's self-purification. The articles advocates that the restoration of the virgin wetland ecosystems in the Bengal basin following the stoppage of the inordinate amount of unilateral upstream water withdrawals can remove the catastrophe.

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13

Jin, Pengyu, Chao Wang, Jiahui Sun, Xiaohui Lei i Hao Wang. "Real-Time Control Operation Method of Water Diversion Project Based on River Diversion Disturbance". Water 15, nr 15 (2.08.2023): 2793. http://dx.doi.org/10.3390/w15152793.

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Changes in water diversion flow are the major disturbance sources in the daily operation of water diversion projects. Ensuring efficient and safe project operation while dealing with different degrees of water diversion disturbance is crucial for real-time control operation. Based on the historical water diversion projects in China and abroad, this study constructs the water diversion disturbance conditions, selects the typical disturbance lines, and constructs the control objectives for different water diversion disturbance lines. The discrete state space equation of the multi-channel pool integral time-delay model is introduced and used as the system prediction model. Concurrently, the simulation results of the river channel hydrodynamic model are used to correct the system state. The model predictive control algorithm is established according to the objective functions of different typical water distribution disturbance lines, and the control strategy of the control gate and pump station along the water diversion project is formulated to assist in the decision making of the project scheduling operation scheme. The proposed method can better cope with different degrees of river diversion disturbance, compensate for the loss of control performance caused by the low accuracy of the generalized model simulation, and improve water level control and sluice regulation.

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14

Qu, Shi Song, Zhong Zhu Zhu, Ning Qiu i Wei Ping Wang. "The Impact of Irrigation Diverting from Yellow River Water on Regional Water Cycle in Shandong Province". Applied Mechanics and Materials 212-213 (październik 2012): 514–17. http://dx.doi.org/10.4028/www.scientific.net/amm.212-213.514.

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Yellow River water diversion is an effective way to alleviate agricultural irrigation water shortage and promote agricultural production around Shandong Yellow River diversion area. It also plays a role in improving regional water cycle, including effects on evaporation, precipitation, surface runoff coefficient, and groundwater level of intake area. The paper studied the development of Yellow River water diversion in Shandong province, and qualitatively analysized the impact on the regional temperature, evaporation. And then the surface runoff coefficient and groundwater level before and after large-scale diversion in the area were quantitatively analysized. The results show that irrigation diversion from Yellow River can increase surface runoff coefficient and groundwater level, bring an enormous benefit to eco-environment, and provide an irreplaceable support role of the sustainable socio-economic development in Shandong province.

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15

Yang, Xiaochen, Jinjin Li, Xiaobo Liu, Jijun Gao, Fei Dong, Aiping Huang, Yang Lei, Wei Wang, Zhiyuan Tong i Jiajia Long. "Research on Water Quality Assessment Using the Water Quality Index for the Eastern Route of the South-to-North Water Diversion Project". Water 15, nr 5 (21.02.2023): 842. http://dx.doi.org/10.3390/w15050842.

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The South-to-North Water Diversion Project’s Eastern Route (SNWDPC-ER) has drawn a lot of attention as one of China’s most significant water diversion projects. This study calculated the water quality index (WQI) to analyze the spatial and temporal characteristics of water quality in the study area as well as the effects of water diversion, and developed the minimum water quality index (WQImin) model based on stepwise multiple linear regression, using data from 56 monitoring stations along the delivery canal of the SNWDPC-ER (the SNWDPC-delivery ER’s canal) from 2014 to 2018. Here are the findings: (1) The water quality state was rated as “good” and the annual average value of WQI climbed year over year along with improvements in water quality. (2) There was a clear difference in water quality across time and space, with autumn having better water quality than other seasons and the south having better water quality than the north. (3) Water quality is impacted by water diversion; throughout the era of diversion, water quality was steadier. (4) The weighted WQImin model, which is a quick and inexpensive way to assess water quality, can be used to evaluate the water quality in the SNWDPC-delivery ER’s canal. The model’s parameters are DO, NH3-N, BOD5, and TN.

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16

Micklin, Philip P. "Water Diversion in the Soviet Union". Science 234, nr 4775 (24.10.1986): 411. http://dx.doi.org/10.1126/science.234.4775.411.b.

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Daga, Vanessa S., Valter M. Azevedo-Santos, Fernando M. Pelicice, Philip M. Fearnside, Gilmar Perbiche-Neves, Lucas R. P. Paschoal, Daniel C. Cavallari i in. "Water diversion in Brazil threatens biodiversity". Ambio 49, nr 1 (27.04.2019): 165–72. http://dx.doi.org/10.1007/s13280-019-01189-8.

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MICKLIN, P. P. "Water Diversion in the Soviet Union". Science 234, nr 4775 (24.10.1986): 411. http://dx.doi.org/10.1126/science.234.4775.411-a.

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Zhu, Kai, Yufeng Cheng i Quan Zhou. "China’s water diversion carries invasive species". Science 380, nr 6651 (23.06.2023): 1230. http://dx.doi.org/10.1126/science.adi6022.

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Ouyang, Shuo, Hui Qin, Jun Shao, Jiantao Lu, Jianping Bing, Xuemin Wang i Rui Zhang. "Multi-objective optimal water supply scheduling model for an inter-basin water transfer system: the South-to-North Water Diversion Middle Route Project, China". Water Supply 20, nr 2 (19.12.2019): 550–64. http://dx.doi.org/10.2166/ws.2019.187.

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Abstract Inter-basin water diversion reallocates water resources by changing their spatio-temporal distribution characteristics between basins. This can effectively relieve water supply and demand conflicts in regions with water resource reserves shortages. However, building inter-basin water diversion projects obviously reduces the inflow from upstream, leading to increasingly conspicuous conflicts between water diversion outside a basin and water utilization inside the basin. To relieve this conflict and explore the optimal scheme of water resource allocation across river basins, this paper chooses the Middle Route Project of the South-to-North Water Diversion Project on the Hanjiang River as a case study. A water supply scheduling model of Danjiangkou Reservoir is built using an integrated inter-basin diversion draw water reservoir regulation (IDR) model to balance multiple conflicting water demands. In the IDR model there are two types of objective sets: aggregate indicators and process matching degree functions. Moreover, six evaluation indexes are selected to analyze the water resource allocation effect of the optimal scheme. The simulation results indicate that the proposed IDR model in this paper is practicable and efficient for water resource allocation across river basins.

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21

Xiao, Jing, i Ningpeng Dong. "Assessing the Future Water and Energy Security of a Regulated River Basin with a Coupled Land Surface and Hydrologic Model". Sustainability 15, nr 5 (24.02.2023): 4106. http://dx.doi.org/10.3390/su15054106.

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To address the water-related issues faced by humans, the planning and construction of dams, water diversion projects, and other water infrastructures have been continuously adopted by decision makers worldwide. This is especially the case for the Yalong River Basin (YRB) in China, which is expected to be one of the most regulated rivers due to reservoir construction and the planned South-to-North Water Diversion project. To understand the potential impact of these water infrastructures on the water resources and hydropower production of the basin and downstream areas, we employ a land surface–hydrologic model with explicit representations of dam operation and water diversions in order to quantify the impact of reservoir operation and water diversion on the future water and energy security of the YRB. In particular, a conceptual reservoir operation scheme and a hydropower-optimized reservoir operation scheme are employed to predict the future release, storage and hydropower generation of the YRB, respectively. Results indicate that reservoirs can have noticeable, cumulative effects in enhancing the water security by reducing the wet season streamflow by 19% and increasing the dry season streamflow by 66%. The water diversion can result in an overall decrease in the streamflow, while the downstream reservoirs are expected to fully mitigate the decline in the dry season streamflow. The hydropower production is likely to decrease by 16% and 10% with conventional and optimized operation schemes, respectively, which suggests that the adaptation of operation rules alone cannot reverse the decline in the electricity production. Our findings can provide implications for sustainable water resource management.

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Zhou, Honghua, Yaning Chen, Zhaoxia Ye, Yupeng Li i Chenggang Zhu. "River–Lake System Connectivity Effectively Reduced the Salinity of Lake Water in Bosten Lake, Northwest China". Water 14, nr 24 (8.12.2022): 4002. http://dx.doi.org/10.3390/w14244002.

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High salinity in water constitutes a serious problem for the aquatic environment management of Bosten Lake. Weak water exchange and water movement are the essential factors for the high total dissolved solids (TDS) content of lake water. To improve the water quality of Bosten Lake, a river–lake system connectivity project (water diversion) was introduced starting at the end of 2018, which diverted fresh water from the Kaidu River and the Huangshuigou River to Bosten Lake. In this study, the effect and its mechanism of water diversion on the TDS content of Bosten Lake were evaluated using continuous-field monitoring data. The results showed that the water diversion effectively reduced the TDS content of the lake water and changed Bosten Lake from a brackish lake back to a freshwater lake. Water diversion also improved the spatial distribution of TDS content. One year, two years, and three years after the implementation of the water diversion project, the TDS content of northern, southern, and eastern lake water significantly decreased by more than 20%, 25%, and 30%, respectively. Our study demonstrated that water diversion significantly increased the annual endogenous TDS pollutant amount discharged from the lake and reduced and homogenized the TDS content of the whole lake. TDS content reduction of the lake was realized by water diversion accelerating water movement and water exchange in the lake, especially for the northern, southern, and eastern waters. Therefore, water diversion could be used as an effective measure for water quality improvement in semi-closed inland lakes in arid areas.

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Zhang, Chi, Xueping Zhu, Guangtao Fu, Huicheng Zhou i Hao Wang. "The impacts of climate change on water diversion strategies for a water deficit reservoir". Journal of Hydroinformatics 16, nr 4 (6.12.2013): 872–89. http://dx.doi.org/10.2166/hydro.2013.053.

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This paper presents an assessment framework that analyses the impacts of climate change on the water diversion strategies of a water transfer project in China. A water diversion strategy consists of high and low water levels as well as related diversion flows in four operating periods: pre-flood, flood, post-flood and non-flood periods. The optimal water diversion problem is defined as a multi-objective problem with two conflicting objectives: minimising human and ecological water supply shortages, and solved by the popular non-dominated sorting genetic algorithm II (NSGA-II). The derived Pareto-optimal solutions are then evaluated using the predicted runoffs based on an ensemble of three general circulation models under three climate scenarios. Results obtained from the study catchment show that intra-annual distribution of future runoff changes. The optimal solutions on the Pareto front have greatly varying performance under a climate scenario. It is critical to reveal the different impacts of climate change on the water shortages over the four operating periods, in particular when an increase of water shortage in one period is masked by a reduction in one or more periods. This study illustrates that the framework can be used to identify resilient water diversion strategies to mitigate the potential impacts of climate change on the operation of a water transfer project.

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Xu, Ruichen, Yong Pang, Zhibing Hu, Tianyi Zhu i John Paul Kaisam. "Influence of water diversion on spatial and temporal distribution of flow field and total phosphorus (TP) concentration field in Taihu Lake". Water Supply 20, nr 3 (4.03.2020): 1059–71. http://dx.doi.org/10.2166/ws.2020.031.

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Abstract In order to evaluate the overall impact of water diversion on Taihu Lake, this paper carries out numerical simulation of the temporal and spatial distribution of the flow field and the TP concentration field in Taihu Lake based on measured data during the water diversion period by using the Euler–Lagrange method. The results show that: (1) the Pearson coefficient of monitoring points in the East Lake area increases significantly during the water diversion period, indicating that the diversion of water may indirectly influence water quality; (2) the diversion of water has a significant influence on the flow rate of the simulated stations in Taihu Lake, and the influence is Taipu (103%) > Gongwan (60%) >East Lake (31%); (3) when the amount of water flow transfer from the Wangyu River to the lake is greater than 100 m3/s, the mean concentration of TP in the Center and East lakes increases significantly (more than 50%). The recommended water diversion discharge is to be controlled in the range 100–200 m3/s and the total water diversion yield between 1.56 and 2.59 billion m3/a.

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Liu, Mengkai, i Acai Yan. "Feasibility analysis of water resources market transaction of water diversion project based on evolutionary game". Water Supply 22, nr 3 (7.12.2021): 3061–71. http://dx.doi.org/10.2166/ws.2021.423.

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Abstract Water diversion projects realize the change of water rights ownership by diverting water resources, but most of the water diversion projects are dominated by the government in the operation stage, which can't realize complete market-oriented transaction of resources. In this study, the water source area, project management department and users involved in water resources trading of a water diversion project are regarded as stakeholders, and an evolutionary game model is established to analyze the feasibility and restrictive conditions of the free trading of water resources in the water diversion project. The research results show that the three parties can realize the balance and stability of interests (the water source area supplies good water, the project management department supplies sufficient water, users take water according to the supply), which means that the water market transactions are feasible. Meanwhile, it also gives clear restrictions on the water price of the three parties transaction: the project management department water price for purchase is less than on the premise of lower than + , the sale water price is not higher than . The free trading of water resources in the water diversion project under the market mechanism is of great significance for clarifying the water rights and reducing the financial pressure of the government.

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Li, Ziming, Yanting Zheng i Yunsheng Bai. "Analysis of Diversion Capacity of Yellow River Diversion Sluices in Irrigation Areas of Lower Yellow River". E3S Web of Conferences 406 (2023): 03038. http://dx.doi.org/10.1051/e3sconf/202340603038.

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This paper analyzes the influence on the diversion capacity of the Yellow River diversion sluices of factors such as the diversion water level change of the Yellow River diversion sluices in the irrigation areas of the lower Yellow River, the scouring of river channels and the siltation change in the diversion channels. It is suggested that the main reason for the decrease in diversion capacity of the Yellow River diversion sluices in different inflow levels is the obvious decrease in the water level of the same discharge due to the continuous scouring of river channels. At the end of this paper, targeted countermeasures and suggestions are put forward to solve the problem of the water diversion capacity decline of Yellow River diversion sluices.

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Wei, Duan. "Beijing water resources and the south to north water diversion project". Canadian Journal of Civil Engineering 32, nr 1 (1.02.2005): 159–63. http://dx.doi.org/10.1139/l04-113.

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Beijing is located in a semiarid region, and water shortage is a common problem in the city. Along with the rapid increase in water demand, due to fast socioeconomic development and an increase in population, a shortage of water resources and a deterioration of the water environment have become obstacles to sustainable socioeconomic development in Beijing. In the long run, sustainable water resources management, water conservation, and completion of the south to north water diversion project will solve the problem. This paper introduces the water resources situation in Beijing; analyzes future water demand; and discusses the actions of water saving, nontraditional water resources exploitation, wetland construction, and water environment protection. The paper also explains the importance of the south to north water diversion project and the general layout of the water supply strategy, water distribution system, and methods to efficiently use the diverted water in Beijing.Key words: water resources, water supply, water saving, water recycling, water diversion.

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Alomari, Nashwan Kamalaldeen, Badronnisa Yusuf, Thamer Ahmad Mohammad i Abdul Halim Ghazali. "Influence of diversion angle on water and sediment flow into diversion channel". International Journal of Sediment Research 35, nr 6 (grudzień 2020): 600–608. http://dx.doi.org/10.1016/j.ijsrc.2020.06.006.

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Mussen, Timothy D., Oliver Patton, Dennis Cocherell, Ali Ercan, Hossein Bandeh, M. Levent Kavvas, Joseph J. Cech i Nann A. Fangue. "Can behavioral fish-guidance devices protect juvenile Chinook salmon (Oncorhynchus tshawytscha) from entrainment into unscreened water-diversion pipes?" Canadian Journal of Fisheries and Aquatic Sciences 71, nr 8 (sierpień 2014): 1209–19. http://dx.doi.org/10.1139/cjfas-2013-0601.

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Entrainment through water-diversion structures is a major passage challenge for fishes in watersheds worldwide. Behavioral guidance devices may be effective in passing fish by diversion inlets, thereby decreasing entrainment without reducing water-diversion rates, but data on their effectiveness is limited. In California’s central valley, out-migrating Chinook salmon (Oncorhynchus tshawytscha) are a species at risk for entrainment through unscreened, small-scale water-diversion pipes. Therefore, we tested entrainment susceptibility and behavior of juvenile Chinook salmon in a large-river-simulation flume at a “river” velocity of 0.15 m·s–1 with a 0.46 m diameter pipe diverting water at 0.57 m3·s–1, during the day and night. Compared with control conditions (no fish deterrent devices present), mean fish entrainment increased by 61% (day) and 43% (night) when underwater strobe lights were active, decreased by 30% when using a metal vibrating (12 Hz) ring during the night, and was unaffected by velocity cap attachments. Fish entrainments started at water velocities of 0.8 m·s–1 and decreased by 54% from spring to summer, possibly resulting from decreased pipe-passage frequency and smaller fish-school sizes. Our findings suggest that substantial entrainment can occur if fish repeatedly pass within 1.5 m of active unscreened diversions, with an estimated 50% of fish lost after encountering 18 pipes in spring and 50 pipes in summer.

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Pang, Min, Weiwei Song, Yuan Liu i Yong Pang. "Simulation of the Parameters Effecting the Water Quality Evolution of Xuanwu Lake, China". International Journal of Environmental Research and Public Health 18, nr 11 (27.05.2021): 5757. http://dx.doi.org/10.3390/ijerph18115757.

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After years of water environment improvement, China’s water quality has improved to some extent in recent years. However, different water areas have different characteristics of water pollution. The paper used mathematical models to investigate the influence of different parameters on the water quality of Xuanwu Lake, China. The predominant focus was on the nutrients concentration due to changing the amount of pollutants, degradation coefficient, water diversion discharge and diffusion coefficient. The results showed that the amount of pollutants had the most significant impact, followed by the degradation coefficient. The total phosphorus and total nitrogen concentrations of Xuanwu Lake increased with the increase of the amount of pollutants. The water quality of Xuanwu Lake decreased significantly with the increase of degradation coefficient. Increasing the water diversion discharge will not only make a big difference in water quality, but it will also worsen the water quality. The effect of the amount of pollutants on Xuanwu Lake total phosphorus and total nitrogen is 4.1 and 5.7 times that of water diversion discharge. The influence of total phosphorus and total nitrogen in the degradation coefficient scheme is 3.5 and 6.2 times that of the water diversion discharge scheme. The diffusion coefficient has almost no effect on the water quality of Xuanwu Lake. From the practical difficulty and implementation effect of water environment improvement, the order of water quality improvement effect from good to bad is as follows: the amount of pollutants scheme, degradation coefficient scheme, water diversion scheme, diffusion coefficient scheme. Under the circumstance of limited water diversion, the lake will effectively improve the water quality. Reducing the discharge of pollutants is the fundamental measure to control water environment problems, and water diversion is an auxiliary measure to improve the water ecology. It will become a trend to combine the reduction of pollutant discharge and water transfer for water environment improvement. This paper is of significance for improving the water quality of Xuanwu Lake, and it also provides a scientific method for water environment improvement of water diversion projects.

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31

Jing, He Fang, i Chun Guang Li. "Applications of Water Temperature Models to Water Diversion Open Channels". Advanced Materials Research 550-553 (lipiec 2012): 2595–99. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.2595.

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In cold area of China, freezing process usually takes place in diversion open channels in winter, which may cause damage to these channels, the property and even the lives of people along these channels. In order to safely transport water using these channels in winter, it is necessary to study water temperature distribution and icing position in the channels. The water temperature distribution in a typical water diversion open channel in Ningxia of China is simulated by using three water temperature models, i.e. cross-section averaged one dimensional model, depth averaged two dimensional model, and width averaged two dimensional model. The numerical results are compared and analyzed among these models. The simulated results indicate that air temperature, wind speed and flow velocity are three key factors that affect the water temperature distribution and icing positions.

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32

Chen, Liang, Linjiang Nan, Wenhai Guan, Xiangjun Fan, Mingxiang Yang, Yubo Huang, Xu Wang, Ningpeng Dong i Hejia Wang. "Simulation and Analysis of the Coupling of Hydrodynamics, Water Quality, and Aquatic Ecology in the Three Gorges Reservoir Area under Various Water Diversion Scenarios". Journal of Physics: Conference Series 2679, nr 1 (1.01.2024): 012046. http://dx.doi.org/10.1088/1742-6596/2679/1/012046.

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Abstract Large-scale water diversion has, to a certain extent, altered the hydrological conditions in the water discharge area, disrupting the long-established hydrological consistency and, in turn, impacting the ecological environment. In this study, we utilized satellite imagery and underwater topographic data of the Three Gorges Reservoir Area (TGRA) to construct a coupled hydrodynamic-water quality-aquatic ecology model based on MIKE21. We simulated and analyzed the water environmental conditions at two crucial sections, Cuntan and Wanzhou, under different water diversion scenarios. The research findings indicate that under both short-term and long-term water diversion scenarios, the pollution levels at both sections have increased, with pollutant concentration varying between 0 to 0.0217 mg/L and 0 to 0.0642 mg/L throughout the year. Long-term water diversion has a more significant impact than short-term diversion, particularly with a longer duration of influence during the winter. The impact of water diversion on water quality classification is not very pronounced. It primarily reduces the number of days when Class I water quality is achieved. Under short-term and long-term water diversion scenarios, the proportion of days with Class I water quality at the Cuntan and Wanzhou sections decreased by 0.28% and 0.55%, and 0.56% and 0.83%, respectively. These research results can serve as a theoretical foundation for further developing ecological risk mitigation strategies and establishing an eco-friendly inter-basin scheduling model.

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33

Bhandari, Indira Sharma. "Rampant Development of Water Diversion Projects as a Threat to Fish Diversity: A Case of the Modi Khola". Hydro Nepal: Journal of Water, Energy and Environment 24 (10.04.2019): 17–19. http://dx.doi.org/10.3126/hn.v24i0.23576.

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The current focus of the country in meeting the increasing demands for energy has led to the increase in number of river water diversion projects for hydropower generation. But the lack of proper guidelines and monitoring mechanism has resulted in rampant licensing of hydropower projects. There are no rules for determining the appropriate number of water diversion projects in a single river. By discussing the case of rampant water diversion projects in the Modi Khola, of western Nepal, this paper raises an important issue of environmental feasibility of projects in the context where, only the engineering and economic feasibility of a project is taken as the basis for project approval and implementation.

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Jiang, Chenjuan, Jia’nan Zhou, Jingcai Wang, Guosheng Fu i Jiren Zhou. "Characteristics and Causes of Long-Term Water Quality Variation in Lixiahe Abdominal Area, China". Water 12, nr 6 (13.06.2020): 1694. http://dx.doi.org/10.3390/w12061694.

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The Lixiahe abdominal area is a representative plain river network in the lower reaches of the Huai River, being an upstream section of south-to-north water diversion from the Yangtze River in Jiangsu Province, China. The assessment of long-term water quality variation and the identification of probable causes can provide references for sustainable water resources management. Based on the monthly water quality data of 15 monitoring stations in the Lixiahe abdominal area, the periodic characteristics and tendency of water quality variation were studied by combining wavelet analysis, the Mann–Kendall trend test, and Sen’s slope estimator, and the correlation between water quality variation, water level, and water diversion was discussed with cross wavelet transform and wavelet coherence. The results show that the comprehensive water quality index (CWQI) included periodic fluctuations on multiple scales from 0.25 to 5 years. The CWQI of 7 out of 15 monitoring stations has a significant decreasing trend, indicating regional water quality improvement. The trend slope ranges from −0.071/yr to 0.007/yr, where −0.071/yr indicates the water quality improvement by one grade in 15 years. The spatial variation of water quality in the Lixiahe abdominal area was significant. The water quality of the main water diversion channels and its nearby rivers was significantly improved, while the improvement of other areas was not significant or even became worse due to the increasing discharge of pollutants. The CWQI of the main water diversion channels and its nearby rivers was inversely correlated with the amount of water diversion. The greater the amount of water diversion, the better the water quality. The water diversion from the Yangtze River has played an important role in improving the regional water environment.

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35

Yao, Yu, Peifang Wang i Chao Wang. "The Influence on Contaminant Bioavailability and Microbial Abundance of Lake Hongze by the South-to-North Water Diversion Project". International Journal of Environmental Research and Public Health 16, nr 17 (23.08.2019): 3068. http://dx.doi.org/10.3390/ijerph16173068.

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The world famous South-to-North Water Transfer Project was built to alleviate serious water shortages in northern China. Considering that lake Hongze is an important freshwater lake in this region, analyzing the influence of water diversion on typical contaminant bioavailability and microbial abundance could aid in achieving a good overall understanding of hydrodynamic variation. Accordingly, in situ high-resolution measurements of diffusive gradients in thin films (DGT) and next-generation high-throughput sequencing were combined in order to survey Lake Hongze and determine the relationship between environmental factors and microbial communities. The DGT method effectively obtained more than the 85% of bioavailable concentrations of the corresponding contaminants; the results showed that labile P, S, Fe, As, and Hg concentrations were higher in areas influenced by water transfer. Moreover, the relative abundance and alpha diversity of the sampling sites distributed in the water transfer area differed significantly from other sites. The pH, conductivity, and labile Mn, As, and P were shown to be the primary environmental factors affecting the abundance and diversity of microbes. With the exception of bioturbation-affected sites controlled by labile Mn and pH, sites distributed in the water diversion area were most affected by As and conductivity, with little spatial discrepancy. Furthermore, site 2, with higher bioturbation abundance, and site 10, with stronger hydrodynamics, had low alpha diversity compared to the other sites. Consequently, the bioavailability of typical contaminants such as P, S, As, Hg, Fe, Mg, Cd, Pb, and Mn, as well as the diversity and abundance of microbial in the sites influenced by the water diversion, were significantly different to the other sites. Thus, the impacts of the South-to-North Water Transfer Project on participant lakes were non-negligible overall in the investigation.

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36

Ren, Jin Liang, i Xue Yu. "Method for Calculation of Water Demand by Pollutant Dilution and Purification in River Networks and its Application to the Zhongmu Baisha District River Networks". Advanced Materials Research 765-767 (wrzesień 2013): 2957–62. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.2957.

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The laws of pollutant dilution, dispersion and purification are discussed for river networks. And then a calculation model for water demand by pollutant dilution is developed, and methods for determination of the total volume of water diversion and flow rate are also given. With the Zhongmu Baisha district river system as an example, the overall plan and its feasibility are studied. With the calculation model for river networks, and by comparison of various water diversion schemes and assessment of the effect of water diversion, a reasonable scheme and the volume of water diversion are determined. The research provides a theoretical basis and technical support for the water quality guarantee of Zhongmu Baisha district river networks.

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Jiang, Min, Xinchuan Zhang, Xing Zhang, Cheng Liu, Xiaoqin Lei i Ji Zhang. "Study on the Impact of Land Use Change on Ecosystem Services in the Water Source Area of the Middle Route Project of S-N Water Diversion". Highlights in Science, Engineering and Technology 91 (15.04.2024): 402–6. http://dx.doi.org/10.54097/2edphr45.

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The South-to-North Water Diversion Project, a major project in China, is of great significance to alleviate the shortage of water resources in the north, and the ecological environment in the middle water source area has the most critical impact on water quality safety. As a natural resource and asset, ecosystem services in the water source area of the Middle Route of the South-to-North Water Diversion Project not only provide important resources and services for human beings but also are the necessary basis for the survival and development of other organisms on the earth.As an integral part of the earth’s economy, the value of ecosystem services in the water source area of the Middle Route of the South-to-North Water Diversion Project directly or indirectly contributes to human welfare. Scientific use of land resources can promote the upgrading and transformation of ecosystem services in the water source area of the Middle Route of the South-to-North Water Diversion Project. Based on this, this paper focuses on the impact of land use change on ecosystem services in the water source area of the middle route of South-to-North Water Diversion and its prevention strategies.

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Song, Weiwei, Xingqian Fu, Yong Pang, Dahao Song, Qing Xu i Peng Zhang. "Research on Water Environment Regulation of Artificial Playground Lake Interconnected Yangtze River". International Journal of Environmental Research and Public Health 15, nr 10 (25.09.2018): 2110. http://dx.doi.org/10.3390/ijerph15102110.

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With the rapid development of China, water pollution is still a serious problem despite implementation of control measures. Reasonable water environment management measures are very important for improving water quality and controlling eutrophication. In this study, the coupled models of hydrodynamics, water quality, and eutrophication were used to predict artificial Playground Lake water quality in the Zhenjiang, China. Recommended “unilateral” and “bilateral” river numerical models were constructed to simulate the water quality in the Playground Lake without or with water diversion by pump, sluice and push pump. Under “unilateral” and “bilateral” river layouts, total nitrogen and total phosphorus meet the landscape water requirement through water diversion. Tourist season in spring and summer and its suitable temperature result in heavier eutrophication, while winter is lighter. Under pumping condition, water quality and eutrophication of “unilateral” river is better than “bilateral” rivers. Under sluice diversion, the central landscape lake of “unilateral river” is not smooth, and water quality and eutrophication is inferior to the “bilateral”. When the water level exceeds the flood control level (4.1 m), priority 1 is launched to discharge water from the Playground Lake. During operation of playground, when water level is less than the minimum level (3.3 m), priority 2 is turned on for pumping diversion or sluice diversion to Playground Lake. After opening the Yangtze river diversion channel sluice, priority 3 is launched for sluice diversion to the Playground Lake. When the temperature is less than 15 °C, from 15 °C to 25 °C and higher than 25 °C, the water quality can be maintained for 15 days, 10 days and 7 days, respectively. Corresponding to the conditions of different priority levels, reasonable choices of scheduling measures under different conditions to improve the water quality and control eutrophication of the Playground Lake. This article is relevant for the environmental management of the artificial Playground Lake, and similar lakes elsewhere.

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39

Liang, Shumin. "A joint water diversion plan for China". Journal - American Water Works Association 105, nr 5 (maj 2013): E264—E277. http://dx.doi.org/10.5942/jawwa.2013.105.0003.

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Korkmaz, Serdar, Emrah Pekkan i Yücel Güney. "Transient Analysis withMODFLOWfor Developing Water-Diversion Function". Journal of Hydrologic Engineering 21, nr 6 (czerwiec 2016): 05016009. http://dx.doi.org/10.1061/(asce)he.1943-5584.0001349.

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41

邢, 威洲. "Emergency Water Diversion Based on Drought Forecasting". Journal of Water Resources Research 06, nr 06 (2017): 585–93. http://dx.doi.org/10.12677/jwrr.2017.66068.

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Shields, F. Douglas, i Thomas G. Sanders. "Water Quality Effects of Excavation and Diversion". Journal of Environmental Engineering 112, nr 2 (kwiecień 1986): 211–28. http://dx.doi.org/10.1061/(asce)0733-9372(1986)112:2(211).

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Shuo, Ouyang, Qin Hui, Shao Jun, Zhang Rui i Dai Minglong. "Operation Mode of Danjiangkou Reservoir under Water Diversion Conditions of South-to-North Water Diversion Middle Route Project". IOP Conference Series: Materials Science and Engineering 366 (czerwiec 2018): 012010. http://dx.doi.org/10.1088/1757-899x/366/1/012010.

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Zhao, Mingyan, Xiangbo Meng, Boxin Wang, Dasheng Zhang, Yafeng Zhao i Ruyi Li. "Groundwater Recharge Modeling under Water Diversion Engineering: A Case Study in Beijing". Water 14, nr 6 (21.03.2022): 985. http://dx.doi.org/10.3390/w14060985.

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The influence of surface water resource exploitation and utilization projects on groundwater has been widely studied. Surface water diversion projects lead to a reduction in river discharge, which changes the recharge of groundwater systems. In this study, the numerical simulation method is used to predict the variation in groundwater level under different diversion scale scenarios. The Zhangfang water diversion project in Beijing, China, was chosen for the case study. The downstream plain area of the Zhangfang water diversion project is modeled by MODFLOW to predict the influence of reducing water diversion on the dynamic change in the groundwater level in the downstream plain area. The model results show that the difference in groundwater recharge and discharge on the downstream plain of Zhangfang is 9,991,900 m3/a, which is in a negative water balance state, and the groundwater level continues to decrease. Reducing the amount of water diverted by the Zhangfang water diversion project to replenish groundwater is beneficial to the rise of the groundwater level in the downstream plain area. The results indicate that the groundwater flow model in the downstream plain area of Zhangfang performed well in the influence assessment of surface water resource exploitation and utilization projects on groundwater. This study also provides a good example of how to coordinate the relationship between surface water resources and groundwater resources.

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45

Zhao, Qian, Hong Bo Li, Quan Wei Wei i Huan Zhen Zhang. "Poly- Factors Coupling Analysis of Baiyangdian Basin Water Storage Characteristics". Applied Mechanics and Materials 71-78 (lipiec 2011): 3104–9. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.3104.

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As typical shallow lake of the north China plain, Baiyangdian plays an important role on water system composition and water amount adjustment. Its water storage and average annual rainfall of the basin does not exist directly relation and its maintenance of function water amount can only rely on unconventional water supplies and diversion support. The lack of natural entering water and frequent artificially diversion makes Baiyangdian gradually become "artificial lakes". In order to solve the current problems of Baiyangdian, the control of development indexes for Baiyangdian basin water resources urgently needs to be intensified, and water diversion mechanism of basin water amount based on Water subsidise cycle should be established.

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46

Xiaolin, YIN. "Study on Long-term Water Quality Protection Mechanism Framework of Inter-basin Water Diversion Protect". MATEC Web of Conferences 246 (2018): 01071. http://dx.doi.org/10.1051/matecconf/201824601071.

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With the increasing and complicated contradiction between the supply and demand of water resources in recent years, a number of inter-basin water diversion projects have been built in various places in China. The water supply objects of the inter-basin water diversion projects are mostly industrial and domestic water, and the water quality is closely related to the success or failure of the water transfer project, which makes it necessary to establish a long-term water quality protection mechanism. On the basis of analyzing major issues in water quality protection in inter-basin water transfer projects, a long-term mechanism framework for water quality protection was established and elaborated from the aspects of institutional system, water quality goals, risk management, guarantee conditions, feedback mechanism, technical evaluation, administrative assessment, public participation, incentive measures, aiming to provides reference for the water quality safety inter-basin water diversion projects.

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47

Song, Weiwei, i Yong Pang. "Research on the influence of diversion flow ratio on the water environment in Nanjing". Water Supply 19, nr 8 (4.09.2019): 2367–78. http://dx.doi.org/10.2166/ws.2019.120.

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Abstract In this paper, we take the Qinhuai River Basin in Nanjing as an example to study the influence of diversion flow ratio on the water environment. The daily precipitation of 20 rainfall stations in the basin was collected from 1962 to 2006, and the rainfall under different assurance rates was calculated by P-III frequency curve to calculate the surface runoff in different typical years. In the meantime, according to the downstream furcated estuary water level in different typical years, the diversion flow ratio under different frequencies was calculated by using a mathematical model of the water environment. The results show that the diversion flow ratio of a branch channel increases with the increase of water level difference, and the growth rate decreases gradually. The other branch channel diversion flow ratio decreases with the increase of water level difference, and the decreasing rate decreases gradually. The pollutant concentrations in the bifurcated rivers are equal, but the concentration decreases exponentially with the increase of the upstream flow. Under different rainfall frequencies, the diversion pollutant ratio and diversion flow ratio are equal in different months of different years.

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48

Qingqing, Yang, i Du Chengrong. "Risk analysis of construction diversion scheme". E3S Web of Conferences 145 (2020): 02078. http://dx.doi.org/10.1051/e3sconf/202014502078.

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The determination of diversion risk in the construction of water conservancy and hydropower projects is a key problem related to the guarantee of project safety, saving project investment, giving full play to benefits in advance and facilitating construction. According to the design data, considering the influence of the uncertain factors such as hydrology and hydraulics, this paper analyses the relationship between the elevation of the upstream cofferdam and the upstream design water level, uses the Monte Carlo method to simulate the construction flood process and the discharge capacity of the diversion buildings, makes statistical analysis and determines the risk corresponding to the upstream water level distribution of the cofferdam and the water retaining height of the cofferdam, and establishes the calculation model of the construction diversion risk.

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49

Su, Longqiang. "Response of land use changes on ecological water diversion in midstream of the Heihe River Basin". MATEC Web of Conferences 246 (2018): 02017. http://dx.doi.org/10.1051/matecconf/201824602017.

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Based on the land use data in midstream of the Heihe River Basin in 1986, the CLUE-S model was used to simulate the land use distribution in 2000. In addition, the simulated map was verified by the land use map in 2000. Then the spatial pattern of land used in 2015 under the scenario without water diversion was simulated. The results show that the CLUE-S model could be applied to simulate the spatial pattern of land use changes in midstream of the Heihe River basin. Under both scenarios, cultivated land and construction land area showed a tendency of increasing. Forestland, pastureland and unused land showed a tendency of decreasing, while the convert tendency from unused land to other land use types was accelerated. The water surface area decreased under the scenario without water diversion, while under ecological water diversion scenario it showed a tendency of increasing. After the implementation of water diversion, the speed was accelerated. Under the scenario without water diversion, the main types of land use changes were cultivated land, pastureland and water surface area. Conversely, they were cultivated land, pastureland and unused land.

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Shao, Zhiying, Fengping Wu, Fang Li, Yue Zhao i Xia Xu. "System Dynamics Model for Evaluating Socio-Economic Impacts of Different Water Diversion Quantity from Transboundary River Basins—A Case Study of Xinjiang". International Journal of Environmental Research and Public Health 17, nr 23 (5.12.2020): 9091. http://dx.doi.org/10.3390/ijerph17239091.

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With the rapid development of social economy and global climate warming, scarce transboundary water resources, as one of the basic resources for socio-economic development, have increasingly become the focus of basin countries. To investigate the socio-economic impacts of different water diversion quantity from transboundary river basins, we used a system dynamics (SD) model to reflect interactions between population, water resources, and socio-economic development, and applied it to a case study in Xinjiang to simulate its change tendency from 2011 to 2030 from the temporal dimension. Then, four water diversion quantity of transboundary river basins and four alternative socio-economic development patterns were designed to comprehensively evaluate these impacts of water diversion quantity change on the socio-economy of the region along the river under different socio-economic development patterns. The results indicate that (1) there was a positive correlation between water diversion quantity and the economic output value of the region along transboundary river basins, and the marginal benefit of transboundary water resources would decrease gradually; (2) considering the difficulty of water diversion from transboundary river basins and the protection of downstream water use and ecological health of transboundary river basins, we believe that increasing the transboundary water resources by 20% was more conducive to the sustainable development of Xinjiang’s socio-economy; (3) through the comparison of dynamic evolutions of socio-economic development and water impacts under four socio-economic development patterns, it is best for Xinjiang to plan its future development in the coordinated development of economic-resource scenario. Following this scenario, not only would the total output value of the socio-economy be better than other scenarios, but this also helps to alleviate the contradiction between the water supply and demand, which expected there would be a water shortage of 1.04 billion m3 in 2029 under 20% increase in water diversion quantity. Therefore, appropriate water diversion quantity, reasonable adjustment of industrial production growth rate, reduction of water consumption quotas of different industries and domestic water quota, and improvement of collection and treatment rate for sewage should be given priority in water resources management decision-making in Xinjiang or other arid regions along transboundary river basins.

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