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Critical discharge at Datong for controlling operation of South-to-North Water Transfer Project in dry seasons 被引量:3
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作者 Wang Yigang Huang Huiming Li Xi 《Water Science and Engineering》 EI CAS 2008年第2期47-58,共12页
Previous research shows that there is a strong correlation between saltwater intrusion in the Yangtze Estuary and discharge at Datong. In the near future, the discharge of the Yangtze River during dry seasons will dec... Previous research shows that there is a strong correlation between saltwater intrusion in the Yangtze Estuary and discharge at Datong. In the near future, the discharge of the Yangtze River during dry seasons will decrease due to the construction and operation of large water diversion projects, including the South-to-North Water Transfer Project, which will further exacerbate saltwater intrusion in the estuary. In this paper, a nested 1D river network model and a 2D saltwater numerical model are used to associate saltwater intrusion in the Yangtze Estuary with different values of discharge at Datong. It is concluded that 13 000 m3/s is the critical discharge at Datong for preventing saltwater intrusion and controlling the volume of water transferred by the South-to-North Water Transfer Project. Furthermore, based on the analysis of river discharge from Datong to Xuliujing and in consideration of the influence of all of the water diversion projects, operation schemes are proposed for the Eastern Route of the South-to-North Water Transfer Project for different hydrological years. 展开更多
关键词 saltwater intrusion critical discharge at Datong water diversion the south-to-north water transfer project
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Evolution trend of the water quality in Dongping Lake after South-North Water Transfer Project in China 被引量:2
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作者 HU Zun-fang KANG Feng-xin +4 位作者 ZOU An-de YU Lin-song LI Yang TIAN Tong-liang KANG Gui-ling 《Journal of Groundwater Science and Engineering》 2019年第4期333-339,共7页
To investigate the evolution trend of water quality in Dongping Lake after South-North Water Transfer Project operation as well as to ensure the safe usage of the water receiving areas, water samples were collected an... To investigate the evolution trend of water quality in Dongping Lake after South-North Water Transfer Project operation as well as to ensure the safe usage of the water receiving areas, water samples were collected and determined before and after water delivery in different hydrological seasons. Then, comprehensive pollution index method, comprehensive nutrition state index method and health risk assessment model were utilized to evaluate the quality, nutrition, and health risk of Dongping Lake water. Results showed that the quality of Dongping Lake water still met level Ⅲ (light pollution) no matter before or after water delivery. The nutrition state was improved from light eutropher before water delivery to mesotropher after water delivery. The health risk level was reduced from high-medium before water delivery to medium level after water delivery. In summary, the operation of the eastern route of South-North Water Transfer Project is beneficial for water environment improvement of Dongping Lake. 展开更多
关键词 south-north water transfer project Dongping LAKE water quality NUTRITION Health risk
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Geological conditions and key rock mechanics issues in the Western Route of South-to-North Water Transfer Project 被引量:2
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作者 XuechaoWang 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE 2011年第3期234-243,共10页
In terms of special geological conditions of the Western Route of South-to-North Water Transfer Project, the classification method for surrounding rocks is discussed by combining with the construction method of tunnel... In terms of special geological conditions of the Western Route of South-to-North Water Transfer Project, the classification method for surrounding rocks is discussed by combining with the construction method of tunnel boring machine (TBM). The classification standard of surrounding rocks is put forward on the basis of physical simulations and engineering practices. Damage, deformation and evolution of surrounding rocks induced by TBM excavation are discussed. Meanwhile, the long-term deformation mechanisms and stability of surrounding rocks are also studied. On this basis, a three-dimensional constitutive model for interbedded sandstone slate and a fiat shell-joint element-foundation system for calculating internal forces of segment lining are established. The deformation features of surrounding rocks of deep and steep interbedded sandstone slate and their influences on internal forces of segment lining are presented. Finally, the design methods of segment lining constructed in deep and steep flysch are proposed. 展开更多
关键词 the Western Route of south-to-north water transfer project rock mechanics issues classification of surrounding rocks stability of surrounding rocks excavation-induced damage lining design
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Forecasting Loss of Ecosystem Service Value Using a BP Network: A Case Study of the Impact of the South-to-north Water Transfer Project on the Ecological Environmental in Xiangfan, Hubei Province, China 被引量:1
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作者 YUN-FENG CHEN, JING-XUAN ZHOU, JIE XIAO, AND YAN-PING LIEnvironmental Science and Engineering College, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2003年第4期379-391,共13页
Objective To recognize and assess the impact of the South-to-north Water Transfer Project (SNWTP) on the ecological environment of Xiangfan, Hubei Province, situated in the water-out area, and develop sound scientific... Objective To recognize and assess the impact of the South-to-north Water Transfer Project (SNWTP) on the ecological environment of Xiangfan, Hubei Province, situated in the water-out area, and develop sound scientific countermeasures. Methods A three-layer BP network was built to simulate topology and process of the eco-economy system of Xiangfan. Historical data of ecological environmental factors and socio-economic factors as inputs, and corresponding historical data of ecosystem service value (ESV) and GDP as target outputs, were presented to train and test the network. When predicted input data after 2001 were presented to trained network as generalization sets, ESVs and GDPs of 2002, 2003, 2004... till 2050 were simulated as output in succession. Results Up to 2050, the area would have suffered an accumulative total ESV loss of RMB 104.9 billion, which accounted for 37.36% of the present ESV. The coinstantaneous GDP would change asynchronously with ESV, it would go through an up-to-down process and finally lose RMB89.3 billion, which accounted for 18.71% of 2001. Conclusions The simulation indicates that ESV loss means damage to the capability of socio-economic sustainable development, and suggests that artificial neural networks (ANNs) provide a feasible and effective method and have an important potential in ESV modeling. 展开更多
关键词 Artificial neural network BP Ecosystem service value south-to-north water transfer project
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LONG AND DEEP DIVERSION TUNNELS OF 1^(ST) STAGE PROJECT IN WEST ROUTE OF SOUTH-NORTH WATER TRANSFER PROJECT
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作者 Shen Fengsheng,Liu Xin (Reconnaissance,Planning,Design and Research Institute,Yellow River Construction Commission, Ministry of Water Resources, Zhengzhou 450003 China) 《岩石力学与工程学报》 EI CAS CSCD 北大核心 2003年第9期1527-1532,共6页
West Route of South-North Water Transfer Project,situated in southeastern Qinghai-Tibet Plateau,is a giant project,which will deliver 17 billion m3 of water from the main stream and tributaries upstream of the Yangtze... West Route of South-North Water Transfer Project,situated in southeastern Qinghai-Tibet Plateau,is a giant project,which will deliver 17 billion m3 of water from the main stream and tributaries upstream of the Yangtze River to the upper reaches of the Yellow River. It is to be constructed in 3 stages, of which the 1st stage project includes delivering 4 billion m3 of water by gravity from two tributaries of Yalong River and three tributaries of Dadu River. The project consists of 5 dams,7 tunnels and a channel in series,with the dam height of 63~123 m and water transfer length of 260.3 km,of which the tunnels measure 244.1 km. The special climatic,environmental and geologic conditions make the project much more complicated in construction,especially 3 tunnels with the length longer than 50 km each create challenges to the technical requirements of engineering survey,design and construction. 展开更多
关键词 南水北调工程 西线工程 引水隧洞 TBM
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Eco-environmental benefit assessment of China's South-North Water Transfer Scheme——the middle route project
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作者 DUANGuang-ming ZHAOJing-zhu LIUGuo-hua KEBing XIAOHan WUGang DENGHong-bing 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2004年第2期308-315,共8页
This paper assess the eco-environmental benefits that may come from the middle route project of China's South-North Water Transfer Scheme(SNWT) with principles and methods of eco-economics and planning reports of ... This paper assess the eco-environmental benefits that may come from the middle route project of China's South-North Water Transfer Scheme(SNWT) with principles and methods of eco-economics and planning reports of SNWT's middle route project. Some benefits were calculated in monetary units. To make sure that the results can be comparable with normal monetary indices, concrete assessment objects and the parameters are prudently selected according to the major characteristics of the project and its water import region. Primary assessment revealed that in different project construction stages, the benefit could be more than 13 07 billion RMB Yuan in 2010 and 19 79 billion RMB Yuan in 2030, respectively. The monetary value tends to increase with social-economic development. To realize these potential benefits, however, calls for more endeavors. 展开更多
关键词 China's south-north water transfer Scheme(SNWT) the middle route project of south-north water transfer(MRPSNWT) assessment ecosystem services monetary indices
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Price Analysis of Water Supply for South-to-North Water Transfer Project
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作者 QIU Zhong enProfessor, Design Institute, Changjiang Water Resources Commission, Wuhan 430010, China Tan Chang liSenior Engineer, Design Institute, Changjiang Water Resources Commission, Wuhan 430010, China ZHU Qin Engineer, Design Institute, Chan 《人民长江》 北大核心 2001年第S1期29-32,共4页
The factors influencing the water supply price of a hydraulic project include natural conditions and economic policies. This paper thoroughly demonstrates the water price of South-to-North Water Transfer Project from ... The factors influencing the water supply price of a hydraulic project include natural conditions and economic policies. This paper thoroughly demonstrates the water price of South-to-North Water Transfer Project from the viewpoint of economic policies. It is considered that if the project is assigned as a profitable one and built depending on commercial loan from bank completely or mostly, the water price will be too high to be undertaken by users,and if the project places the public good at first while considering the economic benefit, its investment mainly relies on the state (national or local governments) appropriation and self-raised funds and a little from the bank loan on favorable terms, the price determined according to the principle of satisfying the cost and reasonable profit will be relatively lower and can be undertaken by the users in the North China where water shortage is serious. The problem of higher water price of agricultural irrigation to the north of the Yellow River can be tackled by taking measures such as "compensating agriculture by industry" according to foreign practical experiences and relevant suggestions. 展开更多
关键词 PRICE of water supply water PRICE estimation FUND RAISING schemes water transfer cost Middle-Route project of south-to-north water transfer
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南水北调东线一期工程受水区生态环境效益演变 被引量:1
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作者 高媛媛 杨亚锋 +2 位作者 杨荣雪 刘艺欣 王红瑞 《南水北调与水利科技(中英文)》 CAS CSCD 北大核心 2024年第3期566-574,共9页
研究南水北调东线一期工程通水以来受水区生态环境效益的演变态势,对南水北调后续工程高质量建设、加快构建国家水网以及促进工程综合效益发挥有决策参考作用。以定性定量相结合的方式分析东线一期工程在优化水资源配置、保障饮水安全... 研究南水北调东线一期工程通水以来受水区生态环境效益的演变态势,对南水北调后续工程高质量建设、加快构建国家水网以及促进工程综合效益发挥有决策参考作用。以定性定量相结合的方式分析东线一期工程在优化水资源配置、保障饮水安全、复苏河湖生态环境和畅通南北经济循环等方面的作用,进而结合层次分析法,从直接效益和间接效益2个方面,筛选构建东线一期工程受水区生态环境效益评价指标体系,主要包括工程年供水量、水质改善度、生态补水量、地下水压采量、地下水水位、水域面积、绿地面积和涵养水源等,并采用VlseKriterijumska Optimizacija I Kompromisno Resenje(VIKOR)多准则妥协解排序方法对南水北调东线一期工程通水以来即2013-2022年受水区生态环境效益演变态势进行分析。结果表明:南水北调东线一期工程通水的10年以来,受水区的生态环境整体复苏效果明显,近3年排序值保持在0.8以上;受降水偏枯进而影响地下水开采量和地下水水位等因素影响,2019年间接生态环境效益下降29.2%,之后迅速恢复并保持稳定。在分析直接效益和间接效益演变的基础上,从工程提质增效、提高工程水质状况以及完善体制机制建设等方面提出东线一期工程进一步促进受水区生态环境持续改善的策略和建议,以期为东线工程及受水区生态环境保护及高质量发展相关研究、决策制定等提供参考。 展开更多
关键词 南水北调东线一期工程 生态环境效益 指标体系 VIKOR
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协同推进南水北调后续工程和长江经济带高质量发展 被引量:2
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作者 鞠连义 《水利发展研究》 2024年第2期45-49,共5页
推动长江经济带高质量发展,是以习近平同志为核心的党中央作出的重大决策,是关系党和国家事业发展全局的重大战略。南水北调东、中、西三条线均以长江为水源,是跨流域跨区域配置水资源的骨干工程,是国家水网的主骨架和大动脉,在保障国... 推动长江经济带高质量发展,是以习近平同志为核心的党中央作出的重大决策,是关系党和国家事业发展全局的重大战略。南水北调东、中、西三条线均以长江为水源,是跨流域跨区域配置水资源的骨干工程,是国家水网的主骨架和大动脉,在保障国家经济安全、粮食安全、生态安全等方面具有基础性、战略性作用。两者联系紧密,互促共生。文章通过对长江经济带高质量发展内涵的分析,以及在国家水安全保障、长江经济带高质量发展对南水北调高质量发展的具体要求梳理的基础上,对共同推进南水北调和长江经济带高质量发展提出了初步的认识和思考。 展开更多
关键词 南水北调 长江经济带 国家水网 高质量发展
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南水北调西线工程水源区和受水区降水变化及丰枯遭遇特征分析
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作者 王荣 杜孝忠 +5 位作者 巢清尘 赵珊珊 叶殿秀 李修仓 李莹 张梦然 《气候变化研究进展》 CSCD 北大核心 2024年第5期571-580,共10页
基于规划中的南水北调西线工程区域内274个国家气象站1961—2022年逐日降水资料,分析了西线工程水源区和受水区年和四季降水量的时空分布特征,以及两区降水的丰枯遭遇特征。结果表明:近62年来,南水北调西线工程水源区年降水量总体呈增... 基于规划中的南水北调西线工程区域内274个国家气象站1961—2022年逐日降水资料,分析了西线工程水源区和受水区年和四季降水量的时空分布特征,以及两区降水的丰枯遭遇特征。结果表明:近62年来,南水北调西线工程水源区年降水量总体呈增多趋势,而受水区年降水量没有明显变化趋势;夏、冬季水源区和受水区降水量均增多,春、秋季水源区降水量增多而受水区降水量减少;年和春、夏、秋季水源区枯水频率均低于受水区枯水频率,并且水源区枯水频率呈减少趋势,而丰水频率呈增加趋势;水源区和受水区年和四季降水丰枯异步频率普遍在60%以上,远大于丰枯同步频率,有利调水的5种丰枯遭遇在年和春、夏、秋季发生频率均超过50%。总体而言,南水北调西线工程水源区和受水区的降水具有较强的丰枯补偿性,且1971年以来有利调水发生频次呈增加趋势,理论上存在保证供水的可能性。但水源区出现连续枯水年的频次较多。因此,在南水北调西线工程规划设计和运行调度时需充分考虑水源区和受水区降水的变化。 展开更多
关键词 降水 丰枯遭遇 南水北调西线 水源区 受水区
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南水北调中线工程水源地南阳推进EOD模式的路径研究
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作者 牛亚丽 吴梦 李玉英 《环境保护与循环经济》 2024年第10期39-43,共5页
近年来,生态环境导向的开发(EOD)模式受到广泛关注。南阳作为南水北调中线工程核心水源地,也是渠首所在地,推进EOD模式有助于其将“绿水青山”转变为“金山银山”,能够为生态环境治理与产业协同发展提供有力支撑,同时促进共同富裕。农... 近年来,生态环境导向的开发(EOD)模式受到广泛关注。南阳作为南水北调中线工程核心水源地,也是渠首所在地,推进EOD模式有助于其将“绿水青山”转变为“金山银山”,能够为生态环境治理与产业协同发展提供有力支撑,同时促进共同富裕。农产品资源丰富但竞争力不强、生态产品价值实现周期长、保水质任务艰巨制约着其推进EOD模式。基于此,建议采用“授权—建设—运营”(ABO)模式进行运营,从打造特色名片、构建农产品平台服务体系以及加强合作等方面着手推进。 展开更多
关键词 生态环境导向 开发模式 南水北调中线工程水源地
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Simulation of Transport Channel in China's Middle Route South-to-North Water Transfer Project 被引量:3
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作者 方神光 魏加华 +1 位作者 吴保生 尚毅梓 《Tsinghua Science and Technology》 SCIE EI CAS 2009年第3期367-377,共11页
The unsteady flow in the Middle Route South-to-North Water Transfer Channel was simulated numerically using an implicit solution procedure for the Saint Venant equations. An equivalent roughness was used to simulate t... The unsteady flow in the Middle Route South-to-North Water Transfer Channel was simulated numerically using an implicit solution procedure for the Saint Venant equations. An equivalent roughness was used to simulate the effect of many transfer structures on the water levels in the main channel. Various gate operating and control methods were analyzed to study the response to disturbances produced by varying the flow rates through the Tianjin outlet. The results show that when the inflow at the head changes in the same way as the sum of the flow rates through all the outlets, the transition time and the fluctuation of the water levels using the timed gate operation method are less than when using the simultaneous gate operation method, but the variations of the gate openings and flow rates through each control gate are much larger. The flow disturbances produced by the Tianjin outlet can be rectified within several channel sections and the transition time can be greatly shortened by allowing the water levels immediately upstream of the control gates to vary within proscribed ranges, rather than being held constant. 展开更多
关键词 Middle Route south-to-north water transfer project unsteady flow open channel control system SIMULATION
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2-D NUMERICAL SIMULATION OF FLOODING EFFECTS CAUSED BY SOUTH-TO-NORTH WATER TRANSFER PROJECT 被引量:1
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作者 SUN Dong-po XUE Hai +2 位作者 WANG Peng-tao LU Rui-li LIAO Xiao- long 《Journal of Hydrodynamics》 SCIE EI CSCD 2008年第5期662-667,共6页
Since the General Channel designed for the South-to-North Water Transfer Project in China has to cross many rivers and streams flowing from west to east, there are potentially serious effects additional flooding on th... Since the General Channel designed for the South-to-North Water Transfer Project in China has to cross many rivers and streams flowing from west to east, there are potentially serious effects additional flooding on the western side of the project alignment. Therefore, a 2-D numerical model for forecasting basin flood disasters was established and verified using historical flood data. The model was applied to researching the interaction between the proposed Project and flooding events for 5 streams in the Anyang River reach as a representative case study. Simulated results indicate that the model could correctly forecast the flood, submerged area and depths, and water surface elevations along the left side of the channel. The discharge capacity and location of hydraulic structures in the transfer canal alignment were analyzed. Then adjustments to the dimensions and positioning of proposed hydraulic structures were recommended at intersections, especially the addition of a channel to transfer flood water from one stream to another, which can effectively limit the sluice and protect the Anyang City from flooding. 展开更多
关键词 south-to-north water transfer project 2-D numerical simulation interpenetrating flood field diffiuent canal
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基于标准化温度指数的南水北调中线工程沿线地区冷暖冬评估 被引量:1
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作者 陈晓楠 李天毅 +1 位作者 郭新蕾 李景刚 《南水北调与水利科技(中英文)》 CAS CSCD 北大核心 2024年第4期810-820,共11页
选择南水北调中线工程沿线邯郸、正定、涿州为代表地区,利用1979-2021年冬季逐日气温数据,分析各代表区气温序列统计频率分布与理论概率分布的拟合情况,提出标准化温度指数(standardized temperature index,STI),并据此建立新的冬季冷... 选择南水北调中线工程沿线邯郸、正定、涿州为代表地区,利用1979-2021年冬季逐日气温数据,分析各代表区气温序列统计频率分布与理论概率分布的拟合情况,提出标准化温度指数(standardized temperature index,STI),并据此建立新的冬季冷暖量化评估模型。结果表明:STI方法与国标法的冬季冷暖评估结果基本一致,但在各代表区强冷冬和强暖冬划定上,STI评估得出的年份数量均少于国标法;各代表区以1月份气温计算得出的冷暖等级阈值对应的气温值均明显低于按整个冬季3个月计算结果。工程所在纬度越高,冬季冷暖等级阈值对应的气温值越低;根据STI评估结果,邯郸、正定、涿州发生强冷冬概率分别为7.14%、9.52%和4.76%,发生弱冷冬及以上的概率分别为38.09%、40.48%和38.09%,发生平冬的概率分别为21.43%、28.57%和21.43%,发生弱暖冬及以上的概率分别为40.48%、30.95%和40.48%,发生强暖冬的概率分别为4.76%、7.14%和2.38%。研究成果与基于正态分布的国标法相比,考虑了气温序列的偏态性概率分布特征,对相对冷暖的判别更科学,有推广应用价值。 展开更多
关键词 南水北调中线 标准化温度指数 冰期输水 冬季冷暖评估
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南水北调中线京石段闸门间歇关闭水力响应特性
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作者 雷毓灵 崔巍 +3 位作者 王磊 丁志楠 穆祥鹏 陈文学 《南水北调与水利科技(中英文)》 CAS CSCD 北大核心 2024年第3期427-435,共9页
为减小闸门关闭引发的水位壅高,以南水北调中线工程京石段磁河闸至沙河北闸之间的渠池为研究对象,构建一维明渠非恒定渐变流仿真模型,比较分次间歇关闸与一次连续关闸,以及不同闸门间歇方案对闸前壅水峰值、水力振荡稳定时间的影响。研... 为减小闸门关闭引发的水位壅高,以南水北调中线工程京石段磁河闸至沙河北闸之间的渠池为研究对象,构建一维明渠非恒定渐变流仿真模型,比较分次间歇关闸与一次连续关闸,以及不同闸门间歇方案对闸前壅水峰值、水力振荡稳定时间的影响。研究表明:分次间歇关闸可带来更低的闸前壅水水位和更短的水力振荡稳定时间;设置1次间歇相较于多次间歇可减小闸前壅水峰值,将间歇开始时刻设置在上游降水波即将传播至闸前的时刻、设置间歇时长略小于关闸总时间的1/2均可有效降低闸前壅水峰值,缩短稳定时间。闸门分次间歇关闭水力响应特性与水波运动规律紧密关联,合理设置间歇有助于在应急调控阶段减少事故造成的影响。 展开更多
关键词 明渠水力学 南水北调中线工程 闸门分次间歇关闭 水力振荡 应急调度
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南水北调前后北京平原区地下水和地面沉降演变特征 被引量:5
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作者 雷坤超 《地质学报》 EI CAS CSCD 北大核心 2024年第2期591-610,共20页
超量开采地下水引发的地面沉降已成为制约北京区域社会经济可持续发展的重要因素之一。2014年12月,南水北调中线工程正式通水,每年向北京输水超过10×10^(8)m^(3),改变了北京供水格局,也为地下水压采、涵养及控制地面沉降创造了条... 超量开采地下水引发的地面沉降已成为制约北京区域社会经济可持续发展的重要因素之一。2014年12月,南水北调中线工程正式通水,每年向北京输水超过10×10^(8)m^(3),改变了北京供水格局,也为地下水压采、涵养及控制地面沉降创造了条件。本文利用多种监测数据,分析南水进京前后,北京平原区地下水和地面沉降的变化;研究不同水位变化模式下不同岩性及深度土层的变形特征;计算土层不同变形阶段的弹性和非弹性储水率;并对黏性土层产生较大残余变形和滞后变形的原因进行了探讨。结果表明:①2015~2020年,平原区大部分地区第一至第四含水层组地下水位逐渐上升,地面沉降呈减缓的趋势。②第二和第三压缩层组是沉降主要贡献层,除平各庄和榆垡站外,其余各站第三压缩层组沉降占比逐渐增大,沉降主控层有向深部转移的规律。③平原区北部和东部,第二和第三压缩层组对应的地下水位由降转升。在水位下降阶段,土层呈塑性和蠕变变形;水位上升阶段,土层以塑性变形为主,部分时间出现弹性变形,具有黏弹塑性。平原区南部,地下水位始终持续下降,土层变形始终呈塑性和蠕变变形。含水砂层则主要呈弹性变形。④土层变形的不同阶段,弹性和非弹性储水率并不是恒定的,随着地下水位下降,储水率呈减小的趋势。⑤黏性土层存在较大残余变形和变形滞后的原因,一是非弹性储水率大于弹性储水率,二是黏性土层的弱渗透性。 展开更多
关键词 北京平原区 南水北调工程 地下水和地面沉降 土层变形 储水率
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南水北调中线沉藻池布置方案优化
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作者 吴永妍 李书友 +2 位作者 郭辉 刘少华 黄明海 《南水北调与水利科技(中英文)》 CAS CSCD 北大核心 2024年第4期798-809,共12页
南水北调中线总干渠联通工程处拟新建沉藻池,实现总干渠藻类等混合物集中沉降和处理。通过现场试验研究总干渠水体藻类等混合物沉降特性,并采用二维水动力数值仿真分析沉藻池在设计工况条件下的水流特性,提出导流墩的优化布置思路。结... 南水北调中线总干渠联通工程处拟新建沉藻池,实现总干渠藻类等混合物集中沉降和处理。通过现场试验研究总干渠水体藻类等混合物沉降特性,并采用二维水动力数值仿真分析沉藻池在设计工况条件下的水流特性,提出导流墩的优化布置思路。结果表明:在水深基本一致条件下,随着断面平均流速的增加,有效沉降距离增加,有效沉降率有所降低;在沉藻池初始设计方案下,藻类等混合物可在沉藻池内进行沉降,但沉藻池利用效率不足;布置纵向导流墩后,可有效改善沉藻池内水流平顺性和水体交换能力;在设计工况下,沉藻池内回流区水域面积占比从57%降低至7%,池内水流平均流速从约0.10 m/s降低至约0.07 m/s,平均水龄从约18 h降低至约6 h。研究成果可为中线沉藻池工程布置提供基本技术支撑。 展开更多
关键词 南水北调中线 沉藻池 工程布置 导流墩 沉降距离
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南水北调西线水源区大型底栖动物的适宜水文条件
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作者 王玉莲 闫龙 +3 位作者 曾庆慧 唐家璇 张丰搏 胡鹏 《南水北调与水利科技(中英文)》 CAS CSCD 北大核心 2024年第3期557-565,共9页
为探索南水北调西线工程水源区大型底栖动物群落结构及其适宜的水文条件,于2022年7月(汛期)及11月(非汛期)在南水北调西线工程水源区开展了2次大型底栖动物采样调查,共记录大型底栖动物50个分类单元。结果表明:西线水源区底栖动物群落... 为探索南水北调西线工程水源区大型底栖动物群落结构及其适宜的水文条件,于2022年7月(汛期)及11月(非汛期)在南水北调西线工程水源区开展了2次大型底栖动物采样调查,共记录大型底栖动物50个分类单元。结果表明:西线水源区底栖动物群落组成以节肢动物昆虫纲(Insecta)为绝对优势,占总分类单元数的90.20%。其中,汛期以扁蜉(Heptageniidae sp.,优势度Y=19.9%)为第一优势种,非汛期以襀(Perlidae sp.,优势度Y=13.8%)为第一优势种。时间上,汛期生物密度更高,但非汛期生物多样性及物种均匀度更高;空间上,西线工程上线方案调水河段的生物多样性及生物密度明显高于下线方案。在0~1.0 m/s的流速范围内,不同流速区间的物种数及Margalef多样性指数具有显著差异;且无论是汛期还是非汛期,流速在0.5~1.0 m/s的底栖动物物种数及各项生物多样性指数均处于最高水平。在0~0.6 m的水深范围内,不同水深区间的生物量在汛期或非汛期均具有显著差异,且底栖动物密度整体在0~0.2 m区间内的平均值最高。针对水源区8个优势物种,利用栖境使用模拟法,得到西线工程水源区河流大型底栖动物优势物种的适宜水文条件为水深0.2~0.4 m、流速0.3~0.6 m/s。 展开更多
关键词 南水北调西线工程 水源区 大型底栖动物 群落结构 适宜水文条件
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南水北调东线江苏段典型泵站运行效率模拟模型
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作者 杨靖仁 王超 +1 位作者 雷晓辉 何中政 《南水北调与水利科技(中英文)》 CAS CSCD 北大核心 2024年第2期388-398,共11页
泵站机组运行受多种因素影响,导致泵站运行理论效率与实际效率误差较大。针对泵站机组运行效率精准模拟难题,运用基于高价多项式回归、回归树、多元线性回归、向量机回归、高斯过程回归、神经网络的10个回归算法,建立泵站机组效率模拟... 泵站机组运行受多种因素影响,导致泵站运行理论效率与实际效率误差较大。针对泵站机组运行效率精准模拟难题,运用基于高价多项式回归、回归树、多元线性回归、向量机回归、高斯过程回归、神经网络的10个回归算法,建立泵站机组效率模拟模型并开展对比分析,优选出有效的泵站运行效率模拟建模方法。讨论分析采用“上下游水位+流量”代替传统“扬程+流量”开展泵站运行模拟的效果。以南水北调东线邳州站和遂宁二站共8台机组的历史数据开展实例分析,相关实验结果表明:在所有方法中,高斯过程回归(Gaussian process regression,GPR)模型在均方根误差(ERMS)、平均绝对误差(EMA)、均方误差(EMS)、决定系数(R2)和最大个体误差(EMI)指标上综合表现最佳,R2逼近0.95;使用站上、站下水位代替传统的扬程对模型进行训练,所有模型的综合评价指标整体有所改善。综合来看,使用GPR模型并使用上游、下游水位代替扬程进行模拟效率表现最好,以邳州站4号机为例,可将模拟效率的EMA和EMI分别从16.49%和20.40%减少至0.41%和2.30%,研究成果具有一定实际意义,可为我国调水工程泵站经济运行提供有力支撑。 展开更多
关键词 机器学习 深度学习 高斯过程回归 泵站效率模拟 南水北调东线
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不同水质评价方法在南水北调东线断面的研究与应用
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作者 曹延珺 贺鹏 +1 位作者 黄娟 郭蓉 《环境监控与预警》 2024年第4期102-106,共5页
以2019年南水北调东线工程12个水质监测断面为研究对象,选取溶解氧、高锰酸盐指数、氨氮、总磷、重金属(铜、锌、铅、镉)、粪大肠菌群等9个参评指标的监测结果,采用单因子评价法、内梅罗指数法、综合水质标识指数法和模糊综合矩阵评价法... 以2019年南水北调东线工程12个水质监测断面为研究对象,选取溶解氧、高锰酸盐指数、氨氮、总磷、重金属(铜、锌、铅、镉)、粪大肠菌群等9个参评指标的监测结果,采用单因子评价法、内梅罗指数法、综合水质标识指数法和模糊综合矩阵评价法4种水质评价方法对12个断面水质情况进行评价分析。结果表明,12个断面的水质情况较好,老山乡断面(湖库)采用单因子评价法的水质评价结果为Ⅴ类,主要超标因子为总磷,其他断面水质采用4种方法的评价结果均为Ⅲ类或Ⅱ类。相对其他3种方法而言,单因子评价法计算简单,考核标准严格,得出的水质类别整体最差。在具体应用实践中,应根据评价目的和断面功能,采用较为合适的评价方法,为南水北调水环境管理提供更加客观的依据。 展开更多
关键词 地表水 南水北调 水质评价 评价方法
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