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  reservoir
    Analysis of Joint Action of Seepage and Earthquake of Yuecheng Earth Dam during Reservoir Drawdown
    岳城水土坝水降落渗流与地震共同作用分析
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    With the Theory of Unsteady Open Channel Flow to Study the Capacity Properties of Datengxia Reservoir
    用明渠非恒定流理论对大藤峡水进行容特性研究
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    Stability Monitoring and Analyses of Key Landslides on Reservoir Bank of Three Gorges Project
    三峡工程岸重点滑坡稳定性监测及分析
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    Effect of Reservoir sedimentation on Earthquake-induced Dynamic Water Pressure
    底淤砂对地震动水压力的影响
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    Failure Mechanism and Stability Evaluation of Slopes at Anping Section of Three Gorges Reservoir
    三峡水安坪岸段斜坡破坏机制及稳定性评价
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  “库”译为未确定词的双语例句
    The Analyses of Seismic Response of High Concrete Dam-Compressible Water-Sediment-Foundation Systems
    高混凝土坝—可压缩水—淤砂—地基系统地震反应分析研究
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    Seismic Analysis of Arch Dams with Contraction Joints and Dam-water-foundation Interaction
    考虑坝体—水—地基相互作用的有横缝拱坝地震响应分析
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    Prediction of Water Temperature in Reservoirs
    水温度估算
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    SOME PROBLEMS OF JOINT OPTIMIZATION DISPATCHING OF TWO PARALLEL RESERVOIRS XIN AND FENG
    并联水电站新、枫两联合优化调度问题
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    Utilization of water Resourses of the Yellow River and Longyanxia Reservior Coming into Operation
    龙羊峡水运用和黄河水资源的利用
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  reservoir
Four different kinds of water treatment were applied to examine the photosynthetic characteristics of baldcypress (Taxodium distichum) seedlings in the hydro-fluctuation belt of the Three Gorges Reservoir area.
      
distichum takes on the features of a water-tolerant and hydrophilic plant, which can be considered as one of the species for the building of a forest protection system for the hydro-fluctuation belt in the Three Gorges Reservoir area.
      
Effects of reforestation on the hydrological function of a small watershed in the Three Gorges Reservoir Area
      
To establish a protection forest system in the hydro-fluctuation belt in the Three Gorges Reservoir Area, the species T.
      
Therefore, the extension scale of converting cropland to forest could be enlarged properly in the reservoir area, while it should be limited in the non-reservoir area due to the issues of higher population density and food safety.
      
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In this paper a discussion on the adoption of the seismic coefficients and on safety evaluation in aseismatic design of gravity dams on rock foundations is presented.The discussion is based on further investigations the seismic response of the Xinfengjiang Dam, the Koyna Dam and some other gravity dams selected.In aseismatic design of gravity dams, usually based on static method or so-called pseudo-static method using conventional seismic coefficients and static parameters for calculating the shearing strength,...

In this paper a discussion on the adoption of the seismic coefficients and on safety evaluation in aseismatic design of gravity dams on rock foundations is presented.The discussion is based on further investigations the seismic response of the Xinfengjiang Dam, the Koyna Dam and some other gravity dams selected.In aseismatic design of gravity dams, usually based on static method or so-called pseudo-static method using conventional seismic coefficients and static parameters for calculating the shearing strength, a basic evaluation of the overall stability against sliding of the dam subjected to earthquake, though far from being satisfactory, can usually be obtained. Stress calculation based on such methods, however, is often misleading. Therefore, it is advisable to take a different approach.Applicating the method of dynamic analysis and adopting a design seismic coefficient for the expected ground motion of the dam foundation to estimate the earthquake loadings and stresses, combining them with those produced by normal loads and comparing them with the paremeters for static strength, one may then arrive at a reasonable safety evaluation of a dam.This paper deals mainly with the problem of stability against sliding.The authors present the concept of relative seismic stability, which shall be helpful to indicate the rule of stability against sliding of dams subjected to earthquake and, consequently, to make sure the safety of the dam.In the investigation the dynamic coupling action between the dam and the reservoir water was taken into consideration,the dam and the reservoir water being treated as an assemble of finite elements.The analysis was carried by both the methods of response spectrum and time-history. And the combined effects of dynamic and static loadings were introduced.

本文在通过对新丰江和柯依那(Koyna)大坝的震害情况进一步分析,和选择了其它一些重力坝进行研究后,提出了岩基上重力坝抗震设计地震系数的采用及安全性估算的意见. 在重力坝的抗震设计中,按照静力法或拟静力法和经验的地震系数、抗剪强度的静力指标检验大坝的抗滑稳定性,是可以得到基本估计的,但还存在某些问题;尤其是,在进行坝体强度校核时,往往会使人产生误解.因此,作者认为有必要采用动力分析法和预计的设计坝基地震系数,以估算地震荷载和应力,并与正常荷载的情况组合,取强度的静力指标作出比较,才能得到近乎合理的安全估算. 文中着重研究了大坝滑动稳定性问题,提出了抗震的稳定相对安全率的概念,它有助于揭示地震时大坝抗滑稳定的变化规律,并作出安全的估算. 在分析时,将坝体和水作为有限单元的集合体,考虑了坝体与水在振动时耦合作用,按反应谱法和时程法进行动力分析,得出了动力和静力的综合成果.

Weihe River is one of the tributaries flowing into the Sanmenxia Reservoir. The Lower reach of the Weihe River is a meandering alluvial river with very flat slope. It was in a state of quasi equilibrium in a long term.The confluence of the Weihe River with the main stream of Yellow River is at Tongguan, 113 km upstream from the dam site. The stage at Tongguan may be considered as a local base level of the lower Weihe River.Since the impoundment of the Reservoir,backwater deposits extended upstream in a rapid...

Weihe River is one of the tributaries flowing into the Sanmenxia Reservoir. The Lower reach of the Weihe River is a meandering alluvial river with very flat slope. It was in a state of quasi equilibrium in a long term.The confluence of the Weihe River with the main stream of Yellow River is at Tongguan, 113 km upstream from the dam site. The stage at Tongguan may be considered as a local base level of the lower Weihe River.Since the impoundment of the Reservoir,backwater deposits extended upstream in a rapid rate as a result of the raise of the bed elevation of Tongguan. After the change of the mode of reservoir operation and the subse quent reconstruction of the outlet facilities of the dam, the bed elevation of Tongguan had lowered to some extent. The Weihe River had undergone selfadjustment according to the variation of the bed elevation of Tongguan and the incoming water and sediment flow. L rge floods with hyperconce ntration of sediment took an active part in the flushing of the backwater de-Posits. However,serious deposition have been observed during small flood with hyperconcentration of sediment. In the Process of adjustment, the terminal of backwater deposits of the main channel travelled to and fro in both directins and that of the flood plain extended upstream gradually. The compositions of the bed material became finer and the channel cross section became narrower and deeper. After many years of adjustment the sediment transport and flood concarrying capacity have recovered to a state prior to the construction of the dam.The development of backwater deposits in both main channel anb the flood plain are gradually becoming stabilized.

本文简要地阐述了三门峡水修建前后,泾、渭河水沙基本特性、渭河下游河道特征、冲淤变化,以及潼关局部侵蚀基准面的升降、渭河口拦门沙消长对渭河河道演变的影响,着重分析了建后渭河下游河道比降、河床形态、河床物质组成诸因素的调整过程,以及渭河下游滩、槽淤积末端延伸的基本物理图形和延伸规律。指出河床调整及淤积末端发展的趋势。对影响淤积延伸的因素进行了初步的探讨。

The quantity of sediment carried by flood in rivers with heary concentration is enormous , and large amount of sediment will deposit in reservoirs in the Period of impounding flood , The Process of aggradation and degradation in reservoir exerts influence on flood routing through reservoir. As comparedwith flood routing through clear water reservoir, the outflow from reservoir are influenced in three asoects. decreasing of flood volume, shortening of duration and change of hydrograph. Therefore, the impact of...

The quantity of sediment carried by flood in rivers with heary concentration is enormous , and large amount of sediment will deposit in reservoirs in the Period of impounding flood , The Process of aggradation and degradation in reservoir exerts influence on flood routing through reservoir. As comparedwith flood routing through clear water reservoir, the outflow from reservoir are influenced in three asoects. decreasing of flood volume, shortening of duration and change of hydrograph. Therefore, the impact of aggradation and degradation in reservoir must be taken into account in the computation of flood routing through reservoirs built on rivers with heavy concentration.Three equations are included in the calculation, they are the equati on of outflow of reservoir, equation of sediment transportation and equation of distribution of deposition and erosion in reservoir, The equation of outflow is the Principal equation, and the equation of continuity of sediment transportis being used. Erom which the relationis obtained.

多沙河流的水调洪计算,不同于常用的清水河流的水调洪,主要区別在于区的泥沙淤积和冲刷对出的洪峰、洪量及泄空时间均有影响。本文根据挟沙水流平衡方程及水输沙关系式,提出考虑泥沙冲淤的多沙河流水调洪计算方法,经用黄河三门峡与二级支流蒲河巴家咀水的实际资料验证,获得较好的结果,可为多沙河流水调洪演算应用。

 
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