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Runoff reduction due to environmental changes in the Sanchuanhe river basin

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International Journal of Sediment research 2008年第2期23卷 174-180页

作者： Guoqing WANG1,Jianyun ZHANG2,Ruimin HE3,Naiqian JIANG4,and Xin'ai JING5 1 Senior Engineer,State Key Laboratory of Hydrology-Water Resources and hydraulic Engineering,Nanjing hydraulic research institute,Nanjing 210098,china research Center for Climate Change,MWR,Nanjing 210029,china yellow river institute of hydraulic research,zhengzhou 4.0003.china 2 Prof.,3 Engineer,State Key Laboratory of Hydrology-Water Resources and hydraulic Engineering,Nanjing hydraulic research institute,Nanjing 210098,china 4 Prof.,5 Engineer,yellow river institute of hydraulic research,zhengzhou 4.0003.china [a]Senior Engineer State Key Laboratory of Hydrology-Water Resources and hydraulic Engineering Nanjing hydraulic research institute Nanjing 210098 china research Center for Climate Change MWR Nanjing 210029 china yellow river institute of hydraulic research zhengzhou 4.0003 china [b]Prof. State Key Laboratory of Hydrology-Water Resources and hydraulic Engineering Nanjing hydraulic research institute Nanjing 210098 china [c]Engineer State Key Laboratory of Hydrology-Water Resources and hydraulic Engineering Nanjing hydraulic research institute Nanjing 210098 china [d]Prof. yellow river institute of hydraulic research zhengzhou 4.0003 china [e]Engineer yellow river institute of hydraulic research zhengzhou 4.0003 china

Recently,runoff in many river basins in china has been ***,the role that climate change and human activities are playing in this decrease is currently of *** this study,we evaluated an assessment method that was designed to quantitatively separate the effects of climate change and human activities on runoff in river ***,we calibrated the SIMHYD rainfall runoff model using naturally recorded hydro-meteorologic data pertaining to the Sanchuanhe river basin and then determined the effects of climate change and human activities on runoff by comparing the estimated natural runoff that occurred during the period in which humans disturbed the basin to the runoff that occurred during the period prior to disturbance by *** results of this study revealed that the SIMHYD rainfall runoff model performs well for estimating monthly *** addition,we found that absolute runoff reductions have increased in response to human activities and climate change,with average reductions of 70.1% and 29.9% in total runoff being caused by human activities and climate change,*** together,the results of this study indicate that human activities are the primary cause of runoff reduction in the Sanchuanhe river basin.

关键词： Sanchuanhe river Hydrological simulation Climate change Human activities Impact

Large-eddy simulation of formation of three-dimensional aeolian sand ripples in a turbulent field

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Science china(Physics,Mechanics & Astronomy) 2008年第8期51卷 945-960页

作者： WU ChuiJie1,WANG Ming2 & WANG Liang3 1 State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,china 2 yellow river institute of hydraulic research,zhengzhou 4.0003.china 3 research Center for Fluid Dynamics,Science School,PLA University of Science and Technology,Nanjing 211101,china State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116024 China yellow river institute of hydraulic research Zhengzhou 450003 China research Center for Fluid Dynamics Science School PLA University of Science and Technology Nanjing 211101 China

With the method of large-eddy simulation,the equation of spherule motion and the method of immersed boundary condition,numerical simulations of three-dimen-sional turbulent aeolian motion and the formation of sand ripples under three-di-mensional turbulent wind and the mutual actions of saltation and creeping motion were carried out. The resulting sand ripples have the form that is flat on the upwind side and steep on the leeward,which is identical to the sand ripples in nature. We also realized the self-restoration process of three-dimensional sand ripples,which shows the correctness of the method of numerical simulation and the models of saltation and creeping. Finally,We analyzed the influence of sand ripples on the three-dimensional turbulent wind field,and found that due to the appearance and development of sand ripples,in the normal direction of ground there exists stronger energy exchange,and moreover,there is close correspondence between the forms of sand ripples and the vorticity close to the ground surface.

关键词： large-eddy simulation equation of spherule motion sand ripples saltation creep

SIZE DISTRIBUTIONS OF COARSE SAND BED LOAD IN TURBULENT FLOW FIELD

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Journal of Hydrodynamics 1995年第3期7卷 1-6页

作者： Zhang Hong-wu Wang Shan(institute of hydraulic research yellow river Conservancy Commissivn,zhengzhou 4.0003,P.R.china)

Putting forth effort on analyzing the action of turbulent flow on the sand particles on rvier bed surface,in this paper, the interdependent relation between the size distribution of coarse sand bed load and flow stren... 详细信息

关键词： coarse sand bed size distributions turbulent flow

Dam risk assistant analysis system design

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Science china(Technological Sciences) 2008年第S2期51卷 101-109页

作者： HE XianFeng1,2,3,GU ChongShi3,4,WU ZhongRu3,4 & SU HuaiZhi3,4 1 yellow river institute of hydraulic research,zhengzhou 4.0003.china 2 Embankment Security Defect Prevention and Control Engineering research Center of MWR,zhengzhou 45000,china 3 College of Water Resources and Hydropower Engineering,Hohai University,Nanjing 210098,china 4 National Engineering research Center of Water Resources Efficient Utilization and Engineering Safety,Hohai University,Nanjing 210098,china yellow river institute of hydraulic research Zhengzhou 450003 China Embankment Security Defect Prevention and Control Engineering research Center of MWR Zhengzhou 45000 China College of Water Resources and Hydropower Engineering Hohai University Nanjing 210098 China National Engineering research Center of Water Resources Efficient Utilization and Engineering Safety Hohai University Nanjing 210098 China

In order to reduce the labor intensity and task difficulty of dam risk analysis and to meet the actual requirement of dam risk analysis,it is necessary to establish a dam risk assistant analysis *** program structure and the implementation ways of the dam risk assistant analysis system are analyzed,and a procedural framework with "three-tier and multi-database" structure and "level structure" is *** concept of dam risk assessment system modular development is proposed and the coupled mode of function module and data is ***,the dam risk assistant analysis system is developed using Delphi visual programming language.

关键词： dam risk risk analysis assistant analysis system

Risk analysis model for landslide mass of high slope in dam area

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Science china(Technological Sciences) 2008年第S2期51卷 25-31页

作者： GU ChongShi1,2,HE XianFeng3,4,WU ZhongRu1,2 & SU HuaiZhi1,2 1 College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,china 2 National Engineering research Center of Water Resources Efficient Utilization and Engineering Safety,Nanjing 210098,china 3.yellow river institute of hydraulic research,zhengzhou 4.0003.china 4 Embankment Security Defect Prevention and Control Engineering research Center of MWR,zhengzhou 4.0003.china 1. College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China 2. National Engineering research Center of Water Resources Efficient Utilization and Engineering Safety Nanjing 210098 China 3. yellow river institute of hydraulic research Zhengzhou 450003 China 4. Embankment Security Defect Prevention and Control Engineering research Center of MWR Zhengzhou 450003 China

In order to identify the threat of reservoir bank landslide to dam safety and reduce the risk of dam failure,impact factors of the landslide are *** concept of landslide risk degree is put forward to measure the threat of landslide to dam *** monotony of the landslide risk assessment function which changes with different affecting factors is analyzed *** on gene automatic programming,a data mining model of the landslide risk assessment function is constructed combined with impact factors of reservoir bank landslide on dam *** the assessment function of landslide risk has been excavated and established according to practical project information,which provides a valuable reference for analyzing the impact of landslide on dam risk.

关键词： landslide dam failure risk landslide risk

2022年苹果产业发展概况(二)——苹果期货、标准与品牌建设

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中国果菜 2024年第4期44卷 1-4,8页

作者： china Apple Industry Association National Apple Industry Technology System Jinan Fruit research institute,All china Federation of Supply & Marketing Cooperatives zhengzhou Commodity Exchange 中国苹果产业协会国家苹果产业技术体系中华全国供销合作总社济南果品研究所郑州商品交易所

1苹果期货交易情况1.1苹果期货交割机构根据郑州商品交易所官网消息,苹果期货现有交割仓库1家(陕西),交割厂库19家(陕西9家、山东6家、甘肃3家、河南1家),车船板交割服务机构18家(陕西8家、山东7家、甘肃3家)。苹果交割仓库、厂库及车... 详细信息

1苹果期货交易情况1.1苹果期货交割机构根据郑州商品交易所官网消息,苹果期货现有交割仓库1家(陕西),交割厂库19家(陕西9家、山东6家、甘肃3家、河南1家),车船板交割服务机构18家(陕西8家、山东7家、甘肃3家)。苹果交割仓库、厂库及车船板交割服务机构分布在陕西、山东、甘肃及河南等省。1.2苹果期现货运行情况2022年,苹果期货价格整体呈现先扬后抑的走势,主要分为三个阶段。

关键词：期货交易期货价格苹果交割

维普期刊数据库博看期刊

RECIRCULATING FLOW IN SHALLOW OPEN CHANNEL via THE RNG κ-ε MODEL

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Journal of Hydrodynamics 1999年第1期11卷 41-49页

作者： Kuang Cui-ping (Department of river & Harbour Engineering, Nanjing hydraulic research institute, Nanjing 210024, P. R. china ) Nanjing hydraulic research Inst Nanjing China

The steady recirculating flow behind a sudden expansion in a shallow channel is studied using the renormalization group (RNG) κ-ε model. The predicted recirculating flow and the reattachment length of the recirculating flow are well-supported by the reported experimental data. The computed effective viscosity, turbulence kinetic energy and its dissipation rate given by the RNG κ-ε model are smaller than that by the standard κ-ε model, while the reattachment length of the recirculating flow is larger. The RNG κ-ε medel overcomes the shortcoming of underpredicting the length of the recirculation zone by the standard κ-ε model.

关键词： open channel RNG κ-ε recirculating flow

FLUVIAL PROCESS OF THE DREDGING TEST REACHIN THE LOWER yellow river

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International Journal of Sediment research 1999年第2期14卷 77-82页

作者： LIU Yuelan ZHANG Mingde and LIU Jingguo (The research is supported by National Natural Science Fund and Ministry of Water Resources in Program No. 59890200) (institute of hydraulic research, the yellow river Conservation Commission, zhengzhou, china) (S

The effects of dredging and dike Strengthening at estuary of the yellow river in 1998, the conditions of incoming water and sediment and the evolution of scouring and deposition in the flood season of 1998 at the test... 详细信息

关键词： Dredging Lower yellow river Sediment deposition Fluvial process

On geo-basis of river regulation——A case study for the middle reaches of the Yangtze river

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Science china(Technological Sciences) 2008年第5期51卷 494-505页

作者： LIU GuoWei Nanjing hydraulic research institute, Nanjing 210029, china Nanjing hydraulic research institute Nanjing 210029 China

From the point of view that people have to obey the river's geo-attributes in the river regulation, the definition and the meaning of the geo-attributes of a river are discussed. The geo-basis of the river regulation of the middle reaches of the Yangtze river is expounded in five aspects, including the structural geomorphology environment of flood storage and discharge, the distribution characteristics of subsidence and the sedimentation areas of Dongting Basin, the history evolution of Jianghan Basin, the function of Jianghan Basin and Dongting Basin as the flood water detention areas of Jingjiang river reach in ancient time, and the geological characteristic of Jingjiang river reach. Based on the geo-attributes of the middle reaches of the Yangtze river, some ideas about the middle reach regulation of the Yangtze river are put forward: to process the interchange between the lakes and diked marsh areas in Dongting Basin, to canal the new river route as the flood diversion channel of Jingjiang river reach with the paleo river, to recover the function of Jianghan Basin as flood detention area of the middle reaches. And we should take into consideration the geo-environment of the whole Yangtze river in the river regulation of middle reaches.

关键词： river geo-attributes river regulation the Yangtze river flood