Zeitschriftenartikel: „Reservoirs on the Yellow Hill“

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Fu, Hong Jun. „Reservoir Characteristics of Buried Hill and Oil and Gas Distribution of Hailaer Basin - Case Study of Budate Formation of Sudeerte Oilfield“. Advanced Materials Research 926-930 (Mai 2014): 4425–28. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.4425.

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Buried hill reservoirs are typically found in Sudeerte oilfield in Hailaer basin. In this paper, the lithology, physical property and electric property of buried hill reservoirs are studied incorporating core data, mud logging, wireline logging and seismic attributes data. The major reservoir types of Budate buried hill are confirmed to include porosity, fracture, cavern and dissolved pore, which belong to dual porosity reservoirs. Vertically, the reservoirs get worse with the increase of buried depth and are controlled horizontally by weathering crust position and tectonic stress, and locations nearby fractured belt and structural high positions are preferable places for the formulation of good reservoirs. Oil and gas within the reservoir mainly accumulated inside fractures and pores and reservoirs with plenty existence of fractures and pores have good oil and gas shows and vice versa.

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Nie, Gui Min, Dan Guo, Yan Wang und Xiao Wei Cheng. „Research and Application of the Deep Horizontal Drilling and Completion Technology for Liaohe Oilfield Buried Hill Reservoir“. Applied Mechanics and Materials 241-244 (Dezember 2012): 1396–99. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.1396.

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With the depletion of shallow-layer oil and gas pools inLiaohe oilfield, buried hill stratigraphic reservoirs in Liaohe oil field are becoming main objectives for exploration in recent years, especially in high-risk areas of Xinglongtai deep the Hing ancient buried hill resources are particularly rich. Since 2007, Liaohe oilfield increased investment for Buried Hill reservoirs with deep horizontal drilling developt the buried hill reservoir. Liaohe has completed 36 deep horizontal, with a total footage of 183920m, the average depth of 5109m. Improving drilling speed of "buried hill deep horizontal and branch horizontal wells”, and reducing drilling costs are of great urgency. “Hing buried hill deep horizontal, horizontal wells,” with composite drilling technology, supporting the optimization of PDC bits, the high-pressure jet drilling, the MWD borehole trajectory control and optimization of drilling parameters, the new drilling fluid technology and so on. With a large number of horizontal wells put into Buried Hill stratigraphic reservoirs, oil and gas production of average deep horizontal well increase of 2-5 times. Besides, the previous recovery and production of oil and gas reservoirs significantly improved to create an objective economic and social benefits.

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Sun, Xue Lan, Chun Hong Hu und Jing Qi Xie. „Influence Analysis of Reservoirs on River Health“. Advanced Materials Research 368-373 (Oktober 2011): 1241–44. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.1241.

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Based on the current situation of the Lower Yellow River channel, this paper analyses the factors affecting river health, points out that river channel health is the foundation and key to river health. It evaluates the Yellow River's downstream channel health using fuzzy comprehensive evaluation method and gets the conclusion that the Yellow River's downstream channel health has deteriorated in 50 years and has improved in the beginning of this century. This paper analyses and points out that the reservoir to regulate natural flow-sediment process is the primary means that the human impact on river health. The regulation of reservoir has duality that "excessive" regulation will seriously damage river health and "moderate" regulation can better maintain and restore river health. Coordination of flow-sediment relationship is the key to maintaining the health of the Lower Yellow River.

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Xiu, Da. „Research on Reservoir Conditions of Buried Hill Reservoirs“. IOP Conference Series: Earth and Environmental Science 252 (09.07.2019): 052011. http://dx.doi.org/10.1088/1755-1315/252/5/052011.

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5

WANG, Jincai, Lun ZHAO, Xiangzhong ZHANG, Zhigang YANG, Haili CAO, Li CHEN, Fachao SHAN und Minghui LIU. „Buried hill karst reservoirs and their controls on productivity“. Petroleum Exploration and Development 42, Nr. 6 (Dezember 2015): 852–60. http://dx.doi.org/10.1016/s1876-3804(15)30082-3.

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Tian, Shimin, Yi Zhao, Yuanjian Wang, Enhui Jiang und Shoubing Yu. „Study on Ecological Scheduling of the Xiaolangdi Reservoir Based on the Ecological Needs of Estuarine Fishes“. MATEC Web of Conferences 246 (2018): 01045. http://dx.doi.org/10.1051/matecconf/201824601045.

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The total water amount into the Yellow River estuary is significantly reduced with the construction of a series of reservoirs in the Yellow River, which has a lot of adversely effects on the fishes and fishery resources in the estuary. This research analyzes the impacts of the reservoirs on the runoff and discharge in the Lower Yellow River and the estuary, and pays more attention to the influences of the reduction of water amount on the estuarine ecology and fishes. As a large reservoir nearest to the estuary in the Lower Yellow River, the operation of Xiaolangdi Reservoir plays an important role on the ecological restoration of the lower reaches of the Yellow River and the estuary. Two ecological operation schemes are proposed based on the ecological demands of the estuarine fishes and the actual operation of the Xiaolangdi Reservoir in recent years. One scheme is proposed only on the basis of the estuarine ecological water demands and another scheme takes consideration of ecological water demands and the actual status of the water resources in the Lower Yellow River synthetically. Finally, the feasibility of the two schemes are analyzed according to the actual situation of water storage of the reservoirs in the Yellow River in 2017.

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Wu, Jun Lai, Yue Tian Liu und Hai Ning Yang. „Parameters Optimization of Stereoscopic Horizontal Well Patterns by Using Numerical Reservoir Simulation“. Advanced Materials Research 433-440 (Januar 2012): 2602–6. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.2602.

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Well pattern is the most important affecting factor to the ultimate recovery for an oilfield development. Many researches are reported on areal well pattern, which is widely used in conventional reservoirs development such as low permeability reservoirs, heavy oil reservoirs, multi-layer sandstone reservoirs, etc. In this paper, according to the geological characteristics of fractured buried hill reservoir of Liaohe Oilfield, we firstly present the concept of stereoscopic well patterns and compare it with common areal water flooding. By using numerical reservoir simulation method, we design and optimize the parameters of 5-spot stereoscopic horizontal well patterns, including payzone thickness and horizontal well length under different anisotropic factors of fracture permeability. This can be successfully applied on the development of MM block fractured buried hill reservoir of Liaohe Oilfield.

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Burrows, V. D. „AC Hill oat“. Canadian Journal of Plant Science 72, Nr. 2 (01.04.1992): 439–41. http://dx.doi.org/10.4141/cjps92-050.

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AC Hill oat (Avena sativa L.) is a spring-type, daylength-sensitive, naked-seeded cultivar suitable for the feed and food industries in eastern Canada. It outperformed the check cultivar Tibor in yield, kernel size, hectolitre weight, and percentage of covered seeds in threshed grain. It is resistant to crown rust (Puccinia coronata Cd. f.sp. avenae Eriks. and E. Henn.) race CR13 but is equal to Tibor in loose smut (Ustilago avenae (Pers.) Rostr.) resistance, plant height and susceptibility to septoria (Septoria avenae Frank f.sp. avenae) blotch and barley yellow dwarf virus (BYDV). It is more susceptible to lodging and later in heading and maturity than Tibor.Key words: Avena sativa L., rust and smut resistance, cultivar description, naked oat

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Zhang, Tingting, Ruifeng Zhang, Jianzhang Tian, Lifei Lu, Fengqi Qin, Xianzeng Zhao und Yuefeng Sun. „Two-parameter prestack seismic inversion of porosity and pore-structure parameter of fractured carbonate reservoirs: Part 2 — Applications“. Interpretation 6, Nr. 4 (01.11.2018): SM9—SM17. http://dx.doi.org/10.1190/int-2018-0019.1.

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Fractures and fracture-related dissolution pores, as well as cavities, molds, and vugs, provide the major conduit and/or storage space for hydrocarbons in the deeply buried carbonate hill of Hexiwu field, Bohai Bay Basin. The fractured reservoir generally has lower porosity but better permeability than moldic/vuggy reservoir, and it consists of the major part of the buried-hill slope and buried-hill internal reservoirs. The conventional method of characterizing carbonate reservoirs, however, often mixes these two types of reservoirs together because they both have low acoustic impedance and low bulk modulus. The rock-physics analysis of two field wells indicates that a pore-structure parameter defined in a rock-physics model, the so-called Sun model, can help to distinguish the fractured reservoir zones together with porosity. Fractured zones usually have porosity of less than 5% and a pore-structure parameter of greater than six, whereas moldic/vuggy reservoirs of higher porosity have a pore-structure parameter of less than six. Field-scale application demonstrates that simultaneous prestack seismic inversion for the porosity and pore-structure parameter enables 3D mapping of fractured reservoir zones in the buried carbonate hills. It also provides an analog of detecting fractures and/or fracture-related pores in deeply buried carbonates in similar geologic settings.

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Ragab, R., D. Moidinis, J. Albergel, J. Khouri, A. Drubi und S. Nasri. „The HYDROMED model and its application to semi-arid Mediterranean catchments with hill reservoirs 2: Rainfall-runoff model applications to three Mediterranean hill reservoirs“. Hydrology and Earth System Sciences 5, Nr. 4 (31.12.2001): 554–62. http://dx.doi.org/10.5194/hess-5-554-2001.

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Abstract. The objective of this work was to assess the performance of the newly developed HYDROMED model. Three catchments with hill reservoirs were selected. They are El-Gouazine and Kamech in Tunisia and Es Sindiany in Syria. The rainfall, the spillway flow and volume of water in the reservoirs were used as input to the model. Events that generated spillway flow were preferred for calibration. The results confirmed that the HYDROMED model is capable of reproducing the runoff volume at all the three sites. In calibrating single events, the model performance was high as measured by the Nash-Sutcliffe criterion for goodness of fit. In some events this value was as high as 98%. In simulation mode, the highest Nash-Sutcliffe criterion value was close to 70% in the El-Gouazine and Kamech catchments and close to 50% in the Es Sindiany catchment. Given the limited information available, especially on the unrecorded releases in the three catchments, the hydrological impact of site geology (e.g. Kamech), the unrecorded operator intervention during the spillway flow (e.g. Es Sindiany) and other unaccounted factors (e.g siltation, evaporation, etc.), these results are by and large very encouraging. However, they could be further improved as and when more information on the unrecorded parameters becomes available. Additionally, the results of this work highlighted the need for long term records with a large number of significant events that are able to generate spillway flow to obtain more consistent and reliable parameter values. It also highlights the need for more accurately recorded releases for irrigation and other uses. As these results are encouraging, more tests on those three and other sites are planned. Keywords: HYDROMED, rainfall-runoff model, Mediterranean, conceptual model

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Bian, Jia-qi, Zeng-chuan Dong, Yi-fei Jia und Dun-yu Zhong. „Research on the multi-objective optimal operation of cascade reservoirs in the upper and middle Yellow River basin“. Water Supply 19, Nr. 7 (23.04.2019): 1918–28. http://dx.doi.org/10.2166/ws.2019.067.

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Abstract The reservoirs (hydro plants) along the upper Yellow River are typical cascade reservoirs, with multiple objectives regarding flood control, ice control, water supply, power generation, and ecological security. The competition among these multiple objectives reflects the competition among various agencies with different interests. There has been a certain degree of conflict between ‘power scheduling’, which aims at obtaining greater power generation from the cascade reservoirs, and ‘water regulation’, which is currently being implemented. Questions of how to reasonably use the comprehensive regulation capacity of the cascade reservoirs, in order to relieve the conflicts among multiple objectives, and understand the nature of the competition between ‘power scheduling’ and ‘water regulation’, require urgent research and solutions. Based on an analysis of the current situation regarding water supply, electricity demand, flood control, ice control, and ecology, a multi-objective optimal operation model for the cascade reservoirs in the upper and middle reaches of the Yellow River has been constructed to reveal the relationships between power generation and other objectives. This study provides theoretical evidence for the informed operation of the cascade reservoirs and will be of great significance for coordinating the relationship between power generation and water regulation.

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LIANG, Jie, Yinguo ZHANG, Gang DONG und Binhui XIONG. „A DISCUSSION ON MARINE MESOZOIC-PALAEOZOIC RESERVOIRS IN SOUTH YELLOW SEA“. Marine Geology & Quaternary Geology 31, Nr. 5 (28.11.2011): 101–8. http://dx.doi.org/10.3724/sp.j.1140.2011.05101.

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13

Chen, Mei Tao, Ning Yang und Shang Ming Yang. „Paleozoic Carbonate Hydrocarbon Accumulation Zones in Tahong Uplift Tarim Basin, Western China“. Advanced Materials Research 403-408 (November 2011): 1511–16. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.1511.

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Analyzing the discovered carbonate reservoirs in the Tazhong area, Tarim Basin indicates that the development of a reservoir is controlled by subarial weathering and freshwater leaching processes, sedimentation, early diagenesis, and alteration by deep fluids. According to the origin and lateral distribution of reservoirs, the hydrocarbon accumulation zones in the Tazhong area are classified into four types: buried hill and palaeoweathering crust, organic buildup reef-bank, dolomite interior, and deep fluid alteration. Different types of carbonate hydrocarbon accumulation zones are distributed mainly in specific areas of the Tazhong uplift. Because of the different mechanisms of forming reservoirs in different carbonate hydrocarbon accumulation zones, the reservoir space, reservoir capability, type of reservoir and distribution of reservoirs are often different.

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Wang, Peng, Fenglan Zhao, Jirui Hou, Guoyong Lu, Meng Zhang und Zhixing Wang. „Comparative Analysis of CO2, N2, and Gas Mixture Injection on Asphaltene Deposition Pressure in Reservoir Conditions“. Energies 11, Nr. 9 (18.09.2018): 2483. http://dx.doi.org/10.3390/en11092483.

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CO2 and N2 injection is an effective enhanced oil recovery technology in the oilfield especially for low-permeability and extra low-permeability reservoirs. However, these processes can induce an asphaltene deposition during oil production. Asphaltene-deposition-induced formation damage is a fairly severe problem. Therefore, predicting the likelihood of asphaltene deposition in reservoir conditions is crucial. This paper presents the results of flash separation experiments used to investigate the composition of crude oil in shallow and buried-hill reservoirs. Then, PVTsim Nova is used to simulate the composition change and asphaltene deposition of crude oil. Simulation tests indicate that the content of light components C1-C4 and heavy components C36+ decrease with increasing CO2 and N2 injection volumes. However, the extraction of CO2 is significantly stronger than that of N2. In shallow reservoirs, as the CO2 injection volume increases, the deposition pressure range decreases and asphaltenes are easily deposited. Conversely, the asphaltene deposition pressure of crude oil injected with N2 is higher and will not cause serious asphaltene deposition. When the CO2-N2 injection ratio reaches 1:1, the deposition pressure range shows a significant transition. In buried-hill reservoirs, asphaltene deposition is unlikely to occur with CO2, N2, and a gas mixture injection.

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Guo, Qiao Ling, und Kui Huang. „Study on the Computer Network of the Yellow River Reservoir Running Information Platform“. Applied Mechanics and Materials 190-191 (Juli 2012): 317–20. http://dx.doi.org/10.4028/www.scientific.net/amm.190-191.317.

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In order to realize the optimal operation of the Yellow River groups of cascade reservoirs, it is very necessary to build the running information platform of the Yellow River reservoir scheduling. The paper introduces the overall structure design of the Yellow River reservoir scheduling running platform system, emphatically analyzes the design of network networking scheme, management system and security system in the process of building computer network systems. It provides reference for carrying out the digital watershed network design.

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Mohan Muniyellappa, Ramachandra. „Water Quality Monitoring of Magadi Hill Range Lakes and Reservoirs of India“. Hydrology 6, Nr. 1 (2018): 18. http://dx.doi.org/10.11648/j.hyd.20180601.13.

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Zhang, Qing Guo, und Yi He Li. „Study on Reservoir Characteristics of Shuguang Lower Hill“. Advanced Materials Research 734-737 (August 2013): 189–93. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.189.

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Shuguang lower hill is buried 3500 metres below the band, the exploration difficulty is big and high quality recognition is difficult. According to its complex lithology characteristics, poor porosity and strong heterogeneity, with the application of comprehensive conventional coring, thin-section analysis, scanning electron microscopy and conventional curve data for analysis of reservoir characteristics of the lower hill, lithology and reservoir criterion are established, more over the fracture strata section of the hill is identified. The reservoirs are mainly composed of carbonate rocks and quartzite, the accurate lithology identification provides geological basis for the next step of well deployment.

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Huang, Shu Jun, Hui Zhang, Cui Juan Shang und Shu Long Jing. „Key Technologies of Rebuilding Underground Natural Gas Storages from Carbonate Buried Hill Gas Reservoirs“. Advanced Materials Research 347-353 (Oktober 2011): 1561–67. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.1561.

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In this paper, according to research difficulties of rebuilding underground natural gas storages from carbonate buried hill gas reservoirs, we select a variety of relevant technologies and methods to study. Considering the reservoir geologic features geology, the impact of water intrusion, the difference of reserve calculations and many other factors, we carry out the research and determine the key parameters of rebuilding underground natural gas storages, and finally get a reasonable understanding of the study. Upon completion of large-scale gas storage for research results, further to form the distinctive key technologies of rebuilding underground natural gas storages from carbonate buried hill gas reservoirs. The research results will provide the appropriate technical reference for similar future rebuilding underground gas storages and also provide the technical assurance for a safe and stable gas supply to Beijing, Tianjin and Hebei region.

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Zhang, L. J., L. Wang, W. J. Cai, D. M. Liu und Z. G. Yu. „Organic carbon transport and impacts of human activities in the Yellow River“. Biogeosciences Discussions 9, Nr. 10 (17.10.2012): 14365–405. http://dx.doi.org/10.5194/bgd-9-14365-2012.

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Abstract. Based on four field investigations during 2003 and 2009 along the Yellow River mainstream, we examined the distributions, seasonal variations and transport features of organic carbon, with a focus on the impacts of human activities (reservoir construction and regulation scheme). The results showed that organic carbon transport processes in the Yellow River were different from other major rivers. Particulate organic carbon (POC) dominated in the Yellow River and it mainly originated from the Loess Plateau. POC levels in suspended sediment (POC %) ranged between 0.25% and 2.20% and more than 80% of POC concentrated in the particles with grain size smaller than 16 μm. On time scale, dissolved organic carbon (DOC) correlated negatively with discharges, indicating the influence of dilution effect. Along the river on spatial scales, DOC in the Qinghai-Tibet Plateau was closely related with temperature while DOC in the Loess Plateau showed the concentration effect, due to the abundant human input and the high ratio of evaporation to precipitation. Organic carbon in the Yellow River was very refractory and about 90% of POC and 70% of DOC cannot be degraded. Due to the high turbidity, the Yellow River suffers more impacts from the reservoirs in the transport of total suspended solids (TSS) and organic carbon. Ratios of DOC/POC ranged between 2.0 and 12 in the reservoirs and organic carbon was mainly in the dissolved from. POC deposited in the reservoirs of the Yellow River achieved 0.0033 Gt a−1, about 8 times its annual POC flux discharged to the ocean. During the 2008 Water and Sediment Regulation (WSR) period, DOC and POC fluxes was as high as 1.1 × 1010 g and 2.2 × 1011 g respectively, accounting for 35% of annual DOC flux and 56% of the annual POC flux to the ocean. Discharges and material fluxes to the ocean decline sharply due to the reservoir construction while large amounts of water and sediment are transported to the ocean in such a~short WSR period. These two human disturbances totally altered the processes of substance transport in the Yellow River, and may change the water chemical characteristics in the coastal zones.

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Guo, Yan, Suzhen Hou, Ping Wang und Jun Zhao. „The Impacts of Reservoirs on Runoff in the Upper Yellow River, China“. IOP Conference Series: Earth and Environmental Science 474 (15.05.2020): 062025. http://dx.doi.org/10.1088/1755-1315/474/6/062025.

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Polston, J. E., L. Cohen, T. A. Sherwood, R. Ben-Joseph und M. Lapidot. „Capsicum Species: Symptomless Hosts and Reservoirs of Tomato yellow leaf curl virus“. Phytopathology® 96, Nr. 5 (Mai 2006): 447–52. http://dx.doi.org/10.1094/phyto-96-0447.

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Five Capsicum species were tested for susceptibility to Tomato yellow leaf curl virus (TYLCV) and the mild strain of TYLCV (TYLCV-Mld). TYLCV was able to infect 30 of 55 genotypes of C. annuum, one of six genotypes of C. chinense, one of two genotypes of C. baccatum, and the only genotype of C. frutescens tested but was unable to infect the one genotype of C. pubescens tested. This is the first evidence for the susceptibility of C. baccatum, C. chinense, and C. frutescens to TYLCV. Unlike TYLCV isolates, TYLCV-Mld was unable to infect C. chinense. No host differences were observed between the Israeli and Florida isolates of TYLCV. None of the Capsicum species showed symptoms after infection with TYLCV or TYLCV-Mld. TYLCV was detected in fruits of C. annuum, but whiteflies were unable to transmit virus from fruits to plants. White-flies were able to transmit both TYLCV and TYLCV-Mld from infected pepper plants to tomato plants. Pepper plants in research plots were found infected with TYLCV at rates as much as 100%. These data demonstrate the ability of some genotypes of pepper to serve as reservoirs for the acquisition and transmission of TYLCV and TYLCV-Mld.

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Weigong, Meng, Chen Zhenyan, Li Pai, Guo Yanmin, Gao Xianzhi und Hui Xuefeng. „Exploration theories and practices of buried-hill reservoirs: A case from Liaohe Depression“. Petroleum Exploration and Development 36, Nr. 2 (April 2009): 136–43. http://dx.doi.org/10.1016/s1876-3804(09)60116-6.

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Jianhua, Guo, Guo Yuancao und Wang Lianshan. „Features of buried hill reservoirs in Hexiwu structural belt, Langgu Sag, Jizhong Depression“. Petroleum Exploration and Development 36, Nr. 6 (Dezember 2009): 701–8. http://dx.doi.org/10.1016/s1876-3804(10)60004-3.

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Deng, Yunhua. „Formation and characteristics of large-medium buried-hill hydrocarbon reservoirs in Bohai Sea“. Petroleum Research 2, Nr. 2 (Juni 2017): 97–106. http://dx.doi.org/10.1016/j.ptlrs.2017.07.001.

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宋, 雨平. „Application of Elemental Logging Technology in Archean Buried Hill Reservoirs of Liaohe Oilfield“. Journal of Oil and Gas Technology 39, Nr. 05 (2017): 132–37. http://dx.doi.org/10.12677/jogt.2017.395075.

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Ganesh, S. R., und N. S. Achyuthan. „A new species of shieldtail snake (Reptilia: Squamata: Uropeltidae) from Kolli Hill complex, southern Eastern Ghats, peninsular India“. Journal of Threatened Taxa 12, Nr. 4 (26.03.2020): 15436–42. http://dx.doi.org/10.11609/jott.5680.12.4.15436-15442.

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We describe a new species of shieldtail (uropeltid) snake, Uropeltis rajendrani sp. nov., from the Kolli Hill complex of the southern Eastern Ghats in Tamil Nadu, India. The new species belongs to the U. ceylanica group and is differentiated from related species in having 16–17:16–17:15–16 dorsal scale rows; 145–158 ventral scales; 8–11 pairs of subcaudals; dorsum uniform brown, anteriorly powdered with yellow mottling; venter brown, scales outlined with yellow. This endemic species with a restricted range is known only from atop Kolli Hill complex, inhabiting higher elevation (> 900m) evergreen forests, where it is the only known member of this genus. Allopatric species, endemism, isolated massif, Uropeltis rajendrani sp. nov., Western Ghats.

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Naeimifar, M., R. Pourrahim und G. Zadehdabagh. „Natural Infection of Citrullus colocynthis by Papaya ringspot virus-W in Iran“. Plant Disease 98, Nr. 12 (Dezember 2014): 1748. http://dx.doi.org/10.1094/pdis-06-14-0600-pdn.

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Papaya ringspot virus (PRSV, genus Potyvirus, family Potyviridae) is economically important due to its worldwide distribution and because it can cause serious losses in both cucurbit crops and papaya (3). PRSV has been previously reported from cucurbit crops in Iran (2). In Khuzestan Province, southwest Iran, cucurbit crops, including cucumber, melon, squash, pumpkin, and watermelon, are grown on about 30,000 ha with 720,000 t production annually. To identify possible alternative hosts that may serve as PRSV reservoirs, samples of 36 different common weed species (17 symptomatic and 19 asymptomatic) including Amaranthus sp. (slim amaranth), Carthamus sp. (safflower), Chenopodium album L. (lamb squarters), Citrullus colocynthis (L.) Schrad (colocynth), Convolvulus arvensis L. (field bindweed), Datura stramonium L. (jimson weed), Euphorbia sp. (wart weed), Malva sylvestirs L. (common malva), Solanum nigrum L. (black nightshade), and Sonchus asper (L.) Hill (prickly sow-thistle) were collected in cucurbit open fields during 2012 to 2013 in Khuzestan Province, where PRSV symptoms were observed. Symptoms on weed samples included mottling, mosaic, blistering, cholorosis, vein clearing, interveinal yellowing, yellows, necrosis, leaf distortion, and curling. Samples were tested by DAS-ELISA with specific antisera against PRSV using reagents from Bioreba (Switzerland). Three of the 36 weed samples belonging to C. colocynthis (Cucurbitaceae) with mottling and chlorosis symptoms were positive for PRSV by ELISA. Leaf extracts from PRSV ELISA-positive samples were mechanically inoculated onto indicator host plants, causing local lesions on Chenopodium amaranticolor and systemic symptoms on Cucumis melo, Cucumis sativus, and Cucurbita pepo, but could not produce symptoms on Nicotiana glutinosa, N. tabacum cv. White Burley, or N. tabacum cv. Xanthi. Total RNA was extracted from infected leaves using Tri-reagent (Sigma) and first-strand cDNA synthesis was performed using M-MuLV reverse transcriptase (Fermentas, Lithuania), according to the manufacturer's instructions. The presence of PRSV was confirmed by RT-PCR using primers for the complete coat protein (CP) gene of PRSV-W (forward 5′-GCAGCAATGATAGAGTCATG-3′ and reverse 5′-AACACACAAGCGCGAGTATTCA-3′) (1). The complete CP nucleotide sequence of three Iranian PRSV isolates consisted of 864 nt, coding for a 288 amino acid (aa) protein. Subsequent analysis showed that the CP nucleotide sequences of Iranian isolates (GenBank Accession Nos. KM047884 to KM047886) from C. colocynthis samples were identical. Furthermore, BLAST analysis of the nucleotide sequence comparisons revealed that the Iranian isolates shared the highest identity (96%) with the Chinese PRSV isolate (DQ449533). PRSV-W has been previously reported from different cucurbits using serological and biological detection (2); however, this result provides the first molecular demonstration, to our knowledge, of PRSV-W on C. colocynthis. C. colocynthis is a perennial weed in West and South Iran. This information on the natural infection of C. colocynthis with PSRV-W will help to better understand PRSV epidemiology and to develop a successful management program for reducing the impact of this disease. References: (1) A. Ali et al. Plant Dis. 96:243, 2012. (2) K. Bananej and A. Vahdat. Phytopathol. Mediterr. 47:247, 2008. (3) D. J. Purcifull et al. CMI/AAB Descriptions of Plant Viruses. No. 292, 1984.

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Ashrith, K. N. „Status of Insect Pests and Natural Enemies of Direct Seeded and Transplanted Rice“. Mapana - Journal of Sciences 14, Nr. 4 (13.07.2017): 11–29. http://dx.doi.org/10.12723/mjs.35.2.

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Studies were conducted on the status of insect-pests and natural enemies of direct seeded rice (DSR) in comparison with puddled transplanted rice (PTR) during rabi and kharif in 2013-14. The rice leaf folder and yellow stem required both the seasons. Maximum leaf folder Cnaphalocrocis medinalis (Guenee) (13.03%) damage and yellow stem borer damage (13.49%) of white ears was recorded during last week of October and second week of November in DSR under unprotected situation respectively. While sucking pests population mainly green leafhopper incidence was comparatively high in PTR (3.29 and 4.92/hill) also plant hoppers incidence (BPH and WBPH) (28.90 and 18.44 adults/hill) under unprotected situation during two seasons respectively. Population of predators at both the season remained high throughout the study period in PTR than the DSR except

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Yuting, WANG, QU Xiao, ZHANG Yuehui und JIAO Xiaoxia. „Bioaccumulation of phosphorus by benthic macroinvertebrate in reservoirs at the Yellow River Delta“. Journal of Lake Sciences 18, Nr. 2 (2006): 173–78. http://dx.doi.org/10.18307/2006.0211.

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Smith, K. T., N. P. Rude, M. R. Noatch, D. R. Sechler, Q. E. Phelps und G. W. Whitledge. „Contrasting population characteristics of yellow bass (Morone mississippiensis) in two southern Illinois reservoirs“. Journal of Applied Ichthyology 27, Nr. 1 (30.10.2010): 46–52. http://dx.doi.org/10.1111/j.1439-0426.2010.01575.x.

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HUANG, Qiang. „Synergy methodology for multi-objective operational control of reservoirs in Yellow River basin“. Science in China Series E 47, Nr. 8 (2004): 212. http://dx.doi.org/10.1360/04ez0018.

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Roberts, Craig M., Dennis R. DeVries und Russell A. Wright. „Introduced yellow perch in two Southeastern US reservoirs: ecological interactions with resident fishes“. Lake and Reservoir Management 34, Nr. 2 (19.12.2017): 141–53. http://dx.doi.org/10.1080/10402381.2017.1402225.

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Guo, Xiaoming, Yu Deng, Yan Guo, Ying Zhao und Qiuyue Niu. „Ecohydrological Impacts of Two Large Cascade Reservoirs in the Middle Yellow River, China“. Journal of Hydrologic Engineering 26, Nr. 11 (November 2021): 05021029. http://dx.doi.org/10.1061/(asce)he.1943-5584.0002128.

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Yin, Zun, Catherine Ottlé, Philippe Ciais, Feng Zhou, Xuhui Wang, Polcher Jan, Patrice Dumas et al. „Irrigation, damming, and streamflow fluctuations of the Yellow River“. Hydrology and Earth System Sciences 25, Nr. 3 (05.03.2021): 1133–50. http://dx.doi.org/10.5194/hess-25-1133-2021.

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Abstract. The streamflow of the Yellow River (YR) is strongly affected by human activities like irrigation and dam operation. Many attribution studies have focused on the long-term trends of streamflows, yet the contributions of these anthropogenic factors to streamflow fluctuations have not been well quantified with fully mechanistic models. This study aims to (1) demonstrate whether the mechanistic global land surface model ORCHIDEE (ORganizing Carbon and Hydrology in Dynamic EcosystEms) is able to simulate the streamflows of this complex rivers with human activities using a generic parameterization for human activities and (2) preliminarily quantify the roles of irrigation and dam operation in monthly streamflow fluctuations of the YR from 1982 to 2014 with a newly developed irrigation module and an offline dam operation model. Validations with observed streamflows near the outlet of the YR demonstrated that model performances improved notably with incrementally considering irrigation (mean square error (MSE) decreased by 56.9 %) and dam operation (MSE decreased by another 30.5 %). Irrigation withdrawals were found to substantially reduce the river streamflows by approximately 242.8±27.8×108 m3 yr−1 in line with independent census data (231.4±31.6×108 m3 yr−1). Dam operation does not change the mean streamflows in our model, but it impacts streamflow seasonality, more than the seasonal change of precipitation. By only considering generic operation schemes, our dam model is able to reproduce the water storage changes of the two large reservoirs, LongYangXia and LiuJiaXia (correlation coefficient of ∼ 0.9). Moreover, other commonly neglected factors, such as the large operation contribution from multiple medium/small reservoirs, the dominance of large irrigation districts for streamflows (e.g., the Hetao Plateau), and special management policies during extreme years, are highlighted in this study. Related processes should be integrated into models to better project future YR water resources under climate change and optimize adaption strategies.

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Tang, Qiuhong, Taikan Oki, Shinjiro Kanae und Heping Hu. „Hydrological Cycles Change in the Yellow River Basin during the Last Half of the Twentieth Century“. Journal of Climate 21, Nr. 8 (15.04.2008): 1790–806. http://dx.doi.org/10.1175/2007jcli1854.1.

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Abstract A distributed biosphere hydrological (DBH) model system was used to explore the internal relations among the climate system, human society, and the hydrological system in the Yellow River basin, and to interpret possible mechanisms for observed changes in Yellow River streamflow from 1960 to 2000. Several scenarios were evaluated to elucidate the hydrological response to climate system, land cover, and irrigation. The results show that climate change is the dominant cause of annual streamflow changes in the upper and middle reaches, but human activities dominate annual streamflow changes in the lower reaches of the Yellow River basin. The annual river discharge at the mouth is affected by climate change and by human activities in nearly equal proportion. The linear component of climate change contributes to the observed annual streamflow decrease, but changes in the climate temporal pattern have a larger impact on annual river discharge than does the linear component of climate change. Low flow is more significantly affected by irrigation withdrawals than by climate change. Reservoirs induce more diversions for irrigation, while at the same time the results demonstrate that the reservoirs may help to maintain environmental flows and counter what otherwise would be more serious reductions in low flows.

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Ge, Lizhen, Kaijun Tong, Zhiqiang Meng, Zhiqiang Zhu und Xiaolin Zhu. „Construction of an efficient development mode for buried-hill fractured reservoirs in Bohai Bay“. Advances in Geo-Energy Research 4, Nr. 2 (16.04.2020): 162–72. http://dx.doi.org/10.26804/ager.2020.02.05.

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Yi, Wu, Liu Hong, Si Yong und Pang Jin. „Physical Simulation for Water Injection of Horizontal Wells in Naturally Fractured Buried- Hill Reservoirs“. Energy Procedia 16 (2012): 1364–71. http://dx.doi.org/10.1016/j.egypro.2012.01.217.

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Guan, Huajiao, Xiaoying Shi, Yayuan Tao, Xianqiu Chao und Yumiao Tan. „Mechanism research on technical policy of liquid extraction depressurization development for buried hill reservoirs“. E3S Web of Conferences 252 (2021): 03030. http://dx.doi.org/10.1051/e3sconf/202125203030.

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Most of buried hill reservoirs are in the late stage of water flooding development, especially for this kind of reservoir with large water-oil volume ratio, it is more difficult to develop the residual oil in matrix system. This article presents a new idea about technical policy of extraction depressurization development which has not been studied in domestic and abroad, and analyses the major influence factor of liquid extraction depressurization by dual-media numerical simulation in depth. The results show that it can increase the oil production in matrix system to a greater extent by liquid extraction depressurization. The liquid extraction capacity is the most important factor which contains the effect of uniform speed liquid extraction, variable speed liquid extraction and periodic liquid extraction. Under the condition of keeping stable production, the larger the liquid volume extracted, the faster pressure dropped, and the more oil will be discharged in matrix system. According to these results, this paper suggests the reasonable technical policy of liquid extraction depressurization, and it is of great significance to obtain good effect of slowing down water cut and enhancing oil recovery in depressurization development of the buried hill reservoirs with high water cut and enough energy.

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Silva, Laércio Santos, Izabel Cristina de Luna Galindo, Vinícius Augusto Filla, Romário Pimenta Gomes, Milton César Costa Campos, Angélica Santos Rabelo de Souza Bahia und José Mauricio da Cunha. „Fractionation of heavy metals in yellow latosol cultivated with vegetables“. Semina: Ciências Agrárias 39, Nr. 5 (20.09.2018): 1921. http://dx.doi.org/10.5433/1679-0359.2018v39n5p1921.

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Sequential extraction or chemical fractionation of heavy metals allows inferences to be made about their origin, occurrence, bioavailability, toxic potential and environmental contamination. Thus, the present study aimed to assess the distribution of Cu, Mn, Ni, Pb and Zn among the different soil fractions and landscape compartments of a yellow latosol cultivated with vegetables. Soil samples were collected from five areas cultivated with tomato (Lycopersicon esculentum, Mill.), lettuce (Lactuca sativa), chili pepper (Capsicum annuum L.) and chard (Beta vulgaris L.) in different slope positions (upper, middle, lower), and four reference areas (native forest), at a depth of 0.00 - 0.20 m. Heavy metal levels were also assessed in water used to irrigate the crops and for human consumption by collecting 200 ml of water samples from reservoirs. The soil samples were sequentially fractionated to quantify the concentrations of adsorbed Cu, Mn, Ni, Pb and Zn in the exchangeable (EF), organic matter (OF), amorphous and crystalline iron oxide fractions (AFeOx and CFeOx). Landscape position only interfered significantly in heavy metal adsorption in the soil for Cu and Ni associated with CFeOx and Zn bound to the EF in the farming areas. The highest Cu, Ni, Pb and Zn levels were found in the fractions with less stable chemical bonds (bound to organic matter), in addition to a strong affinity between Cu, Zn and Mn and the oxide fractions (AFeOx + CFeOx). The low affinity of Pb and Ni for the AFeOx and CFeOx fractions indicates greater contamination potential for the water reservoirs. In the short term, organic matter is the main source of remediation for heavy metal contamination in soil, making it important to adopt conservation practices aimed at reducing OM losses.

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Yang, Xiao Long. „Application of Fractures Prediction Technology in Carbonate Rock Reservoirs“. Applied Mechanics and Materials 733 (Februar 2015): 112–15. http://dx.doi.org/10.4028/www.scientific.net/amm.733.112.

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Prediction of fracture is the current difficulties in reservoir prediction, According to the difficulty of carbonate fracture prediction is even greater. Especially when the study area is in slope of buried hill, the main purpose of deeply buried layer (5000-6500m), small structural deformation, major faults are not developed, minor faults are not obvious, weathering and corrosion weak cases, bring the difficulty and challenge to the fracture prediction technology based on tectonic origin. In this paper, view of the above geological conditions, application of the coherent, fine fault interpretation, AVA and MVE fracture prediction technique. At the macro level, the coherent time slice and fine fault interpretation to determine fracture as the constraint of MVE 3D geological modeling, Determine the orientation of fracture by using AVA prediction and FMI imaging logging methods, the tectonic evolution, studying tectonic movement of different period effect on fracture and oil and gas, according to the prediction of fractures and fracture connectivity analysis, forecasting fracture favorable area, and achieved good results.

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Tong, Kai Jun, Yan Chun Su, Li Zhen Ge, Jian Bo Chen und Ling Ling Nie. „Numerical Simulation of the Buried Hill Reservoir in Bohai Bay“. Applied Mechanics and Materials 448-453 (Oktober 2013): 4003–8. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.4003.

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Buried hill reservoir fracture description and reservoir simulation technology have been a hot research, but also is one of the key issues that restrict the efficient development of such reservoirs. Based on JZ buried hill reservoir which heterogeneity is strong, some wells water channeling fast and difficult to control the situation for fracture affect, a typical block of dual medium reservoir numerical models which was comprehensive variety of information, discrete fracture characterization and geological modeling is established. The fractured reservoir numerical model is simulated through Eclipse software to seek the law of remaining oil distribution. Through the reservoir geological reserves and production history matching, the remaining oil distribution of main production horizon is forecasted. On this basis, the results of different oilfield development adjustment programs are predicted by numerical simulation.

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Shaoming, Peng, Zheng Xiaokang, Wang Yu und Li Kefei. „Synergetic Optimal Operation of Cascade Reservoirs in Mainstream of Yellow River Responding to Drought“. Energy Procedia 158 (Februar 2019): 6288–95. http://dx.doi.org/10.1016/j.egypro.2019.01.445.

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Tian, Shimin, Weihong Wang, Baofeng Xie und Min Zhang. „Fluvial processes of the downstream reaches of the reservoirs in the Lower Yellow River“. Journal of Geographical Sciences 26, Nr. 9 (28.07.2016): 1321–36. http://dx.doi.org/10.1007/s11442-016-1329-5.

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Yang, Jie, Jing Ma, De-xiu Hu, Lu Wang, Ji-na Yin und Jie Ren. „Sediment Deposition Risk Analysis and PLSR Model Research for Cascade Reservoirs Upstream of the Yellow River“. Mathematical Problems in Engineering 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/696015.

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It is difficult to effectively identify and eliminate the multiple correlation influence among the independent factors by least-squares regression. Focusing on this insufficiency, the sediment deposition risk of cascade reservoirs and fitting model of sediment flux into the reservoir are studied. The partial least-squares regression (PLSR) method is adopted for modeling analysis; the model fitting is organically combined with the non-model-style data content analysis, so as to realize the regression model, data structure simplification, and multiple correlations analysis among factors; meanwhile the accuracy of the model is ensured through cross validity check. The modeling analysis of sediment flux into the cascade reservoirs of Long-Liu section upstream of the Yellow River indicates that partial least-squares regression can effectively overcome the multiple correlation influence among factors, and the isolated factor variables have better ability to explain the physical cause of measured results.

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Mulholland, Susan C., George Rapp Jr., Amy L. Ollendorf und Ronald Regal. „Variation in phytolith assemblages within a population of corn (cv. Mandan Yellow Flour)“. Canadian Journal of Botany 68, Nr. 8 (01.08.1990): 1638–45. http://dx.doi.org/10.1139/b90-210.

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This project investigates the effects of leaf side, leaf position, individual plant, and hill (or plant group) on phytolith assemblages from Zea mays L. cultivar Mandan Yellow Flour. Thirty-two samples were examined, and 200 phytoliths were classified from each sample. Statistical analysis indicates that leaf side is significant at the 0.05 level above random counting variation; leaf position, individual plant, and hill are not generally significant beyond the effect of leaf side. Analysis of a single sample, either a half or entire leaf, is not sufficient for compilation of representative phytolith assemblages from a plant population. Phytolith reference collections should not be based on single samples of each species. Multiple samples from a population need to be analyzed to obtain information on assemblage variation within the population. The variation of corn phytolith assemblages in this study overlaps those of many Panicoid grasses, indicating that additional morphological characters need to be identified to distinguish corn from wild grasses in the Great Plains. Key words: phytoliths, corn, frequencies, variation.

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Carnegie, A. J. „First Report of Puccinia psidii (Myrtle Rust) in Eucalyptus Plantations in Australia“. Plant Disease 99, Nr. 1 (Januar 2015): 161. http://dx.doi.org/10.1094/pdis-09-14-0901-pdn.

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Puccinia psidii Winter (myrtle rust, eucalyptus rust) is a significant pathogen of Eucalyptus plantations in Brazil, causing reduced growth, stem malformation, and in severe cases, tree death (3). It has a wide host range in the Myrtaceae, with over 445 species in more than 72 genera (4). As such, P. psidii has long been a threat to Australia, where many ecosystems are dominated by Myrtaceae and industries are reliant on myrtaceous hosts, including almost 1 million hectares of eucalypt plantations. In April 2010, P. psidii was detected in Australia (2) and is now established along the east coast from southern New South Wales to far north Queensland (1,5). Although known to cause severe damage to eucalypt seedlings and coppice in native forests (5), it had not been found affecting eucalypt plantations in Australia. Surveys for P. psidii were thus initiated in eucalypt plantations in NSW from the central coast (33°06′40.0″ S, 151°18′13.8″ E) to the NSW–Queensland border, encompassing 55 plantations. Two to four 100-tree transects were conducted per plantation, during spring and summer. Symptoms were first detected in December 2011 in a 6-month-old Eucalyptus agglomerata Maiden plantation on the central coast. Further surveys until summer 2014 identified P. psidii on E. pilularis Sm., E. cloeziana F. Muell., and E. grandis (Hill) Maiden in young plantations from the central coast to the north coast (30°24′20.2″ S, 152°55′57.9″ E) of NSW. Necrotic lesions and yellow pustules typical of P. psidii were present on immature leaves and shoots, often causing leaves to buckle and die. Urediniospores were globose to subglobose, yellowish brown, 15 to 20 × 18 to 23 μm, single-celled, and finely echinulate, with a prominent tonsure on the majority of spores. Teliospores were cylindrical to ellipsoidal with a rounded apex, tan brown, 25 to 45 × 15 to 25 μm, and two-celled, with remnants of a pedicel. These morphological characteristics are consistent with those of P. psidii from Australia and elsewhere (5). Simple Sequence Repeats developed from genome sequencing of an Australian isolate of P. psidii revealed no variation among 15 isolates of P. psidii from Australia and Hawaii, including an isolate from an E. pilularis plantation in NSW (K. S. Sandhu and R. F. Park, unpublished), corroborating the morphological identification. This is the first report of this significant pathogen in eucalypt plantations in Australia. P. psidii was found in only five plantations during the current surveys, in trees 6 months to 2 years old, with only a low incidence (1%) per plantation. Repeat surveys revealed no ongoing disease in the same plantations after trees were three years of age. Moreover, P. psidii was found only in plantations surrounded by native forest stands, which harbor a large reservoir of susceptible hosts, such as Rhodamnia rubescens (Benth.) Miq. The strain of P. psidii that entered Australia is currently not causing serious disease in eucalypt plantations. However, there is a need to continue quarantine restrictions to reduce the chance of another, more aggressive strain of P. psidii entering Australia. References: (1) A. J. Carnegie and J. R. Lidbetter. Australas. Plant Pathol. 41:13, 2012. (2) A. J. Carnegie et al. Australas. Plant Pathol. 39:463, 2010. (3) T. A. Coutinho et al. Plant Dis.82:819, 1998. (4) F. Giblin and A. J. Carnegie. Puccinia psidii (myrtle rust)—Global host list. Retrieved 2 October 2014 from http://www.anpc.asn.au/resources/Myrtle_Rust.html . (5) G. S. Pegg et al. Plant Pathol. 63:1005, 2014.

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Liu, Jian Guang, Meng Meng Feng, Yan Hao Zhang, Kai Li und Hui Liu. „Research on Characteristics Recognition of Organic Matter in Yellow River Reservoir Water“. Advanced Materials Research 374-377 (Oktober 2011): 987–90. http://dx.doi.org/10.4028/www.scientific.net/amr.374-377.987.

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Six water samples from different Yellow River reservoirs in Shandong were selected. The molecular weight distribution and type of organic matter were determined by using ultrafiltration, adsorption experiments and active bio-sand determination methods. The results show that the proportions of TOC and UV254Subscript text in different molecular weight intervals and the type of organic matter are different. But the proportion of adsorbable dissolved organic matter is the largest, which is more than 80%.In addition, the proportion of biodegradable organic matter (BDOC) is little, so the biodegradability of the raw water is not high.

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Zhang, Wensong, Hang Pan, Chunqiao Song, Linghong Ke, Jida Wang, Ronghua Ma, Xinyuan Deng, Kai Liu, Jingying Zhu und Qianhan Wu. „Identifying Emerging Reservoirs along Regulated Rivers Using Multi-Source Remote Sensing Observations“. Remote Sensing 11, Nr. 1 (24.12.2018): 25. http://dx.doi.org/10.3390/rs11010025.

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The number of reservoirs is rapidly increasing owing to the growth of the world’s economy and related energy and water needs. Yet, for the vast majority of reservoirs around the world, their locations and related information, especially for newly dammed reservoirs, are not readily available due to financial, political, or legal considerations. This study proposes an automated method of identifying newly dammed reservoirs from time series of MODIS-derived NDWI (normalized difference water index) images. Its main idea lies in the detection of abrupt changes in the NDWI time series that are associated with land-to-water conversion due to the reservoir impoundment. The proposed method is tested in the upper reach of the Yellow River that is severely regulated by constructed reservoirs. Our results show that five newly dammed reservoirs were identified in the test area during 2000–2018. Validated against high-resolution Google Earth imagery, our method is effective to determine both locations of the emerging medium-size reservoirs and the timing of their initial water impoundments. Such information then allows for a refined calculation of the reservoir inundation extents and storage capacities through the combination of higher-resolution Landsat imagery and SRTM DEM. The comparison of our estimated reservoir areas and capacities against documented information further indicates that the integration of multi-mission remote sensing data may provide useful information for understanding reservoir operations and impacts on river discharges. Our method also demonstrates a potential for regional or global inventory of emerging reservoirs, which is crucial to assessing human impacts on river systems and the global water cycle.

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吴, 炎. „The Method and Application of Geosteering Modeling in Fractured Buried Hill Oil and Gas Reservoirs“. Journal of Oil and Gas Technology 39, Nr. 04 (2017): 120–28. http://dx.doi.org/10.12677/jogt.2017.394045.

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Wang, Jing, Huiqing Liu, Jing Zhang, Qingbang Meng, Huapu Liu, Lizhen Ge, Zhiqiang Zhu und Chang Liu. „Experimental investigation on water flooding and continued EOR techniques in buried-hill metamorphic fractured reservoirs“. Journal of Petroleum Science and Engineering 171 (Dezember 2018): 529–41. http://dx.doi.org/10.1016/j.petrol.2018.07.051.

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