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Node ordinal encoded genetic algorithm for the optimal allocation of water resources

Progress in Natural Science:Materials International 2005年第5期15卷 448-452页

作者： YANG Xiaohua1*, YANG Zhifeng 1,2, SHEN Zhenyao1 and LI Jianqiang3.1. State Key Laboratory of water Environment Simulation, School of Environment, beijing Normal University, beijing 100875,{3. 2. Key Laboratory for water and Sediment Sciences Ministry of Education, School of Environment, beijing Normal University, beijing 100875,{3. 3. water resources and hydropower planning and design {13. institute, mwr, beijing 100011,{3.) State Key Laboratory of water Environment Simulation School of Environment Beijing Normal University Beijing 100875 China Key Laboratory for water and Sediment Sciences Ministry of Education School of Environment Beijing Normal University Beijing 100875 China water resources and hydropower {3. and design general institute MWR Beijing 100011 China

A new method, node ordinal encoded genetic algorithm (NOEGA), is proposed for solving water resources optimal allocation problems, in which the capacity of water resources is split into a number of smaller parts so that successive operations can be overlapped. Our objective is to maximize the whole benefit function. To overcome the “dimensionality and algorithm complexity curse” while searching for solutions and looking for an optimal solution, the operations of one-point crossover operator, gene exchange operator, gene random operator, gene shift operator and node ordinal strings are established. It is proved to be an effective optimal method in searching for global solutions. The NOEGA does not need a diversity of initial population, and it does not have the problem of immature convergence. The results of two cases show that using NOEGA to solve the optimal allocation model is very efficient and robust. In addition, the algorithm complexity of NOEGA is discussed.

关键词： water resources optimal allocation node ordinal code genetic algorithm.

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An ideal interval method of multi-objective decision-making for comprehensive assessment of water resources renewability

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Science china(Technological Sciences) 2004年第z1期47卷 42-50页

作者： YANG Xiaohua1, YANG Zhifeng1,2, SHEN Zhenyao1 & LI Jianqiang3.1. School of Environment, State Key Laboratory of water Environment Simulation, beijing Normal Univer- sity, beijing 100875,{3. 2. School of Environment, Key Laboratory for water and Sediment Sciences of Ministry of Education, beijing Normal University, beijing 100875,{3. 3. water resources and hydropower planning and design general institute, mwr, beijing 100011,{3. School of Environment State Key Laboratory of Water Environment Simulation Beijing Normal University Beijing 100875 China Key Laboratory for water and Sediment Sciences Beijing Normal University Ministry of Education Beijing 100875 China water resources and hydropower {3. and design general institute MWR Beijing 100011 China

In order to estimate water resources renewability scientifically, an Ideal Interval Method of Multiple Objective Decision-Making (IIMMODM) is presented. This method is developed through improving an ideal point method of multiple objective decision-making. The ideal interval is obtained with assessment standard instead of ideal points. The weights are decided by using the basic point and gray code accelerating genetic algorithm. This method has synthesized the expert’s suggestion and avoided giving a mark for the objective again. It could solve the complicated problem of compatible or incompatible multi-objective assessment. The principle of IIMMODM is presented in this paper. It is used to assess the water resources renewability for nine administrative divisions in the Yellow River basin. The result shows that the water resources renewability in the Yellow River basin is very low. Compared with the gray associate analysis method, fuzzy synthesis method and genetic projection pursuit method, the IIMMODM is easier to use. Compared with the ideal point method of multiple objective decision-making, the IIMMODM has good robustness, which is applicable to the comprehensive assessments of water resources.

关键词： water resources renewability, comprehensive assessment, multiple objective decision-making,ideal interval, Yellow River basin.

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Investigation of the 5.12 Wenchuan Earthquake damages to the Zipingpu water Control Project and an assessment of its safety state

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Science china(Technological Sciences) 2009年第4期52卷 820-834页

作者： GUAN ZhiCheng water resources and hydropower {3. & design general institute, beijing100120, china water resources and hydropower {3. & design general institute

On May 12, 2008, a major earthquake measured 8 on the Richter scale jolted Wenchuan County in Si- chuan Province, china with the epicentral intensity of XI degrees. Zipingpu Dam is located 17.17 km from the epicenter and the influence intensity at the damsite reached IX―X degrees. It is the first time in the world for such a high concrete-faced rockfill dam (CFRD) in china to experience such a strong earthquake occurring in such a short distance. Due to its location of special importance to the down- stream areas, the safety state and damaging condition of the Zipingpu Dam has attracted great atten- tions from various circles. Based on site investigation of the damages to the Zipingpu Dam and com- parison analysis of the observation data obtained before and after the earthquake, the paper makes a comprehensive assessment of the key technical issues relevant to this high CFRD, including its safety state and the high slope stability after the earthquake.

关键词： earthquake earthquake damage investigation concrete-faced rockfill dam dam project safety state Zipingpu Dam

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Efficiency of sediment transport by flood and its control in the Lower Yellow River

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Science china(Technological Sciences) 2004年第z1期47卷 173-185页

作者： NI Jinren1, LIU Xiaoyong2, LI Tianhong1, ZHAO Ye’an3.& JIN Ling1 1. Department of Environmental Engineering, Peking University The Key Laboratory of water and Sedi- ment Sciences, Ministry of Education, beijing 100871, china 2. {3. institute of water resources and hydropower planning and design, Ministry of water Re- sources, beijing 100011, china 3. The Yellow River Conservancy Commission, Zhengzhou 450003. china Department of Environmental Engineering Peking University The Key Laboratory of water and Sediment Sciences Ministry of Education

This paper presents the characteristics of sediment transport by flood in the Lower Yellow River with the reach from Huayuankou to Gaocun, which is regarded as a typical braided pattern. The Artificial Neural Network Model on water Use for Sediment Transport (WUST) by flood was established based on the measured data from 1980 to 1998. Consequently, simulations of controlling process of sediment transport by flood were made in terms of the control theory under different scenarios. According to the situation of sediment transport by flood in the Lower Yellow River, Open-Loop control system and feedback control system were adopted in system design. In the Open-Loop control system, numerical simulations were made to reveal the relationship between average discharge of flood and the WUST with varying sediment concentrations. The results demonstrate that sediment concentration has significant influence on the controlling process of flood flow to WUST. It is practical and efficient to control WUST if sediment concentration is less than 20 kg/m3. In the feedback control system, controlling processes of sediment concentration and flood discharge for sediment transport were simulated respectively under given conditions, and it was found that sediment transport process could be controlled completely by sediment concentration and discharge at the inlet of the reach from Huayuankou to Gaocun. Using the same method, controlling processes of sediment transport by flood in other reaches in the Lower Yellow River were also simulated. For the case of sediment concentration being 20 kg/m3. the optimized controlling discharge ranges from 23.0 to 2900 m3.s in the lower reach of Huayuankou. This study is also of significance to flood control and flushing sediment in the Lower Yellow River with proper operation modes of Xiaolangdi Reservoir.

关键词： the Lower Yellow River, flood, sediment transport, efficiency, simulation, control.

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RAIN INTENSITY DISTRIBUTION IN THE SPLASH REGION OF ATOMIZED FLOW

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Journal of Hydrodynamics 2006年第3期18卷 362-366页

作者： DUAN Hong-dong LIU Shi-he LUO Qiu-shi HUANG Wei School of water Resource and hydropower Wuhan University Wuhan 430072China water resources and hydropower {3. and design general institute MWR Beijing 100011 China

Atomized flow is an unnatural two-phase flow produced while water discharges in water release structures. This flow might threaten the normal operation of hydraulic and hydroelectric installations owing to the unnatural and high-density rain as well as the unnatural and dirty mist. The splash region, the region with the highest rain intensity, hence should receive much attention during the design and operation of the hydraulic and hydroelectric installations. In this paper rain intensity distribution in the splash region of the atomized flow is investigated experimentally, and the method of random simulation is used to predict the rain intensity distribution in the splash region.

关键词： atomized flow splash rain intensity

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A STUDY ON THE WARPING NEAR IRRIGATION HEADWORKOF THE LOWER REACH OF YELLOW RIVER

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International Journal of Sediment Research 1999年第2期14卷 399-404页

作者： HUANG Jinchi WANG Yangui (china institute of water {3. and hydropower Research, Fuxinglu, A-l, beijing,10003., china)

The Yellow River is famous for its tremendous amount of sediment transport. Through a careful settlement, large amount of sediment laden flow can be diverted out for warping. however. for successfully completing a warping process, a series of technical measures must be taken and a precisely pre-planning is necessary. In this paper, a general description on the warping for soil improvement has been provided; some technical problems for a successful warping process were put forward and finally. a practical designing example on silt filling at headwork of an irrigation project is examined. The case study shows that drawing of flood {3. at hyper-concentration of sediment for warping is an effective measure to fully utilize {3. and sediment resources in the Lower Yellow River.

关键词： Warping Sediment transport Lower Yellow River

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RECENT EXPERIENCES OF CFRD IN china

RECENT EXPERIENCES OF CFRD IN CHINA

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International Conference of hydropower

作者： JIANG Guocheng china institute of water {3. and hydropower Research beijing ZHAO Zengkai general planning and design institute of water {3. and hydropower beijing

＜正＞china started CFRD construction with modern technologies since the middle of the 1980s. Till the end of 2003. there are more than 110 CFRDs constructed or under construction. Among them, 3. CFRDs have a height o... 详细信息

关键词： concrete face rockflll dams face slab rockflll dam

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EXPERIMENTAL STUDY OF LANDSLIDE DAM-BREAK FLOOD OVER ERODIBLE BED IN OPEN CHANNELS

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Journal of Hydrodynamics 2009年第1期21卷 124-130页

作者： YAN Jun CAO Zhi-xian LIU Huai-han CHEN Li State Key Laboratory of water resources and hydropower Engineering Science Wuhan University Wuhan 430072China Changjiang waterway institute of planning Design and Research Wuhan 430011 China

Large-scale landslide dams may block the river flow and cause inundation upstream, and subsequently fail and result in severe flooding and damage in the downstream. The need for enhanced understanding of the inundation and flooding is evident. This article presents an experimental study of the inundation and landslide dam-break flooding over erodible bed in open channels. A set of automatic water-level probes is deployed to record the highly transient stage, and the post-flooding channel bed elevation is measured. New experimental data resources are provided for understanding the processes of landslide-induced flooding and for testing mathematical rivers models.

关键词： landslide dam dam-break sediment transport

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Characteristics,mechanism and development tendency of deformation of Maoping landslide after commission of Geheyan reservoir on the Qingjiang River,Hubei Province,china

Characteristics,mechanism and development tendency of deform...

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中国科学院地质与地球物理研究所2006学术年会

作者： Shengwen Qi~a,Fuzhang Yan~b,Sijing Wang~a,Ruichun Xu~c a institute of Geology and Geophysics,CAS,beijing 100029,PR china b {3. resources and hydropower planning and design general institute,mwr,beijing, 100011,PR china c Bureau of Investigation and Survey,Changjiang {3. resources Commission,Wuhan 43.010, PR china

Based on field investigation of the constituent structure and geological formation of the Maoping landslide,the authors made anin-depth study of the deformation characteristics and triggering mechanism of the reservoir-induced slide through comprehensive analysis of the about 13.years observation *** Maoping landslide,the largest ancient landslide in Geheyan reservoir,with a volume of 23.5 million m3.is located on the left bank of the Qingjiang River,66 km upstream of Geheyan *** April 1993.eservoir inundation reactivated the landslide,which resulted in relocation of a village of 290 *** then the landslide body has been experiencing persistent deformation with an observed maximum displacement of 2841.4 mm up to October ***,further development of deformation of the landslide becomes a great concern for the safety of the reservoir and *** analysis results show that the Maoping landslide is an ancient landslide that is an accumulation of several consequent slides along the bank slope and experienced several secondary slumps in its front in later *** ongoing deformation of the reactivated landslide is controlled by mechanical properties of materials and hydraulic effects induced by *** slip process is of creep deformation as a whole,and appears to be attenuating in later stage,which indicates very low possibility of the high speed slip and integral failure of the slide.

关键词： Reservoir-induced landslide Sliding mechanism Deformation mechanism Tendency prediction

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Study on the stability of non-cohesive river bank

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International Journal of Sediment Research 2010年第4期25卷 391-398页

作者： Minghui YU1, Hongyan WEI2, Yanjie LIANG3. and Chunyan HU41 Ph.D., Prof., 2,3.Dr., State Key Laboratory of water resources and hydropower Engineering Science, Wuhan University, Wuhan 43.072,{3.,4 Senior Engineer, Changjiang institute of Survey, planning, design and Research, Wuhan 43.010,{3. Ph.D. Prof. State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430072 China Dr. State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430072 China Senior Engineer Changjiang Institute of Survey Planning Design and Research Wuhan 430010 China

Frequent bank collapse in nature highlights the need to study the mechanism of bank stability. This paper presents a theoretical analysis and a flume experimental study on the interaction of hydrodynamic conditions and non-cohesive banks of meandering and straight rivers. No bank collapse occurs if the bank angle is smaller than a critical value. The critical angle is a function of a dimensionless parameter K UD, which is directly proportional to the square of flow velocity near river bed and inversely proportional to the median diameter of bank material. Furthermore, the critical angle reduces with flow velocity and is higher in meandering rivers than in straight rivers. Formulas for estimating the threshold of bank stability are obtained by curve fitting method with experimental data. The results agree with the data measured in the middle and lower reaches of the Yangtze River.

关键词： Non-cohesive Critical bank angle Hydrodynamic condition Impact factor

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