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缅甸DAPEIN(Ⅰ)水电站取水防沙问题研究

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水电能源科学 2009年第4期27卷 91-93,87页

作者：江凌邹军贤陆晶付文军刘永悦河海大学水利水电学院江苏南京210098 武汉大学水资源与水电工程科学国家重点实验室湖北武汉430072

为解决缅甸DAPEIN(Ⅰ)水电站泥沙通过排沙管道或泄流口不致于淤塞库区且避免泥沙流入电厂的问题,分析了取水防沙原设计方案试验中存在的问题,指出冲砂底孔进口上延方案为最优取水防沙方案,探讨了该优化方案在不同工况下的取水防沙效果,... 详细信息

为解决缅甸DAPEIN(Ⅰ)水电站泥沙通过排沙管道或泄流口不致于淤塞库区且避免泥沙流入电厂的问题,分析了取水防沙原设计方案试验中存在的问题,指出冲砂底孔进口上延方案为最优取水防沙方案,探讨了该优化方案在不同工况下的取水防沙效果,提出了运行时应注意的事项。

关键词：水电站取水口取水防沙试验冲砂底孔

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碱对水泥基材料收缩性能的影响

武汉理工大学学报 2005年第1期27卷 33-35页

作者：马保国李相国何真朱洪波董荣珍武汉理工大学硅酸盐材料工程教育部重点实验室武汉430070 武汉大学水资源与水电工程科学国家重点实验室武汉430072

通过测量不同品种和掺量的碱对水泥基材料的水分损失量和自由收缩率,研究了在干燥条件下不同的碱对水泥基材料收缩性能的影响规律。结果表明,在相同水灰比(0.45)和灰砂比(1∶3)条件下,掺入0.214%～1.071%(质量分数,下同)KOH和0.42%NaOH... 详细信息

通过测量不同品种和掺量的碱对水泥基材料的水分损失量和自由收缩率,研究了在干燥条件下不同的碱对水泥基材料收缩性能的影响规律。结果表明,在相同水灰比(0.45)和灰砂比(1∶3)条件下,掺入0.214%～1.071%(质量分数,下同)KOH和0.42%NaOH增加了砂浆的水分损失和早期收缩。同时,发现碱作用下水泥基材料的水分损失与收缩过程密切相关,即浆体的收缩随着水分的损失更加明显。

关键词：碱水泥基材料水分损失收缩

新丰江流域土地利用变化对面源污染负荷的影响

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水电能源科学 2011年第1期29卷 9-12页

作者：董延军孙春敏郑江丽李杰珠江水利委员会珠江水利科学研究院广东广州510611 武汉大学水资源与水电工程科学国家重点实验室湖北武汉430072

以新丰江流域为例,选取1980、2000年TM土地利用解译数据,分析其土地利用变化的模式,并以SWAT模型工具为手段,模拟不同时期土地利用变化条件下径流量与总氮、总磷负荷的变化。结果表明,2000年与1980年相比较,耕地面积与城镇用地均有增加... 详细信息

以新丰江流域为例,选取1980、2000年TM土地利用解译数据,分析其土地利用变化的模式,并以SWAT模型工具为手段,模拟不同时期土地利用变化条件下径流量与总氮、总磷负荷的变化。结果表明,2000年与1980年相比较,耕地面积与城镇用地均有增加,其中城镇用地面积增幅最大,20 a间增长13.5倍;耕地面积对污染负荷影响最大,20 a间总氮、总磷的负荷增长分别为9.3%和5%。

关键词：新丰江土地利用变化面源污染 SWAT

A SIMPLIFIED NUMERICAL MODEL OF 3-D GROUNDwater AND SOLUTE TRANSPORT AT LARGE SCALE AREA

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Journal of Hydrodynamics 2010年第3期22卷 319-328页

作者： LIN Lin YANG Jin-Zhong ZHANG Bin ZHU Yan state key laboratory of water resources and hydropower engineering Wuhan University Wuhan 430072China Institute of Soil science Chinese Academy of Sciences Nanjing 210008 China

A simplified numerical model of groundwater and solute transport is developed. At large scale area there exists a big spatial scale difference between horizontal and vertical length scales. In the resultant model, the seepage region is particularly divided into several virtual layers along the z direction and vertical 1-D columns covering x-y 2-D area according to stratum properties. The numerical algorithm is replacing the full 3-D water and mass balance analysis as the 2-D Galerkin finite element method in x- and y-directions and 1-D finite differential approach in the z direction. The reasonable method of giving minimum thickness is successfully used to handle transient change of water table, drying cells and problem of rewetting. The solution of the simplified model is preconditioned conjugate gradient and ORTHOMIN method. The validity of the developed 3-D groundwater model is tested with the typical pumping and backwater scenarios. Results of water balance of the computed example reveal the model computation reliability. Based on a representative 3-D pollution case, the solute transport module is tested against computing results using the MT3DMS. The capability and high efficiency to predict non-stationary situations of free groundwater surface and solute plume in regional scale problem is quantitatively investigated. It is shown that the proposed model is computationally effective.

关键词： groundwater movement solute transport simplified model 3-D mass balance numerical simulation

QUALIFICATION OF UNCERTAINTY FOR SIMULATING SOLUTE TRANSPORT IN THE HETEROGENEOUS MEDIA WITH SPARSE GRID COLLOCATION METHOD

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Journal of Hydrodynamics 2009年第6期21卷 779-789页

作者： SHI Liang-sheng YANG Jin-zhong state key laboratory of water resources and hydropower engineering science Wuhan University Wuhan 430072 China The Sonny Astani Department of Civil and Environmental engineering University of Southern California Los Angeles CA 90089 USA

The sparse grid collocation method is discussed to qualify the uncertainty of solute transport. The Karhunen-Loeve （KL） expansion is employed to decompose the log transformed hydraulic conductivity. The head, velocity and concentration fields are represented by the Lagrange polynomial expansion. A sparse grid collocation method is then used to reduce the original stochastic partial differential equations to a set of deterministic equations which is collocated at selected interpolation （collocation） points. The collocation points are constructed by the Smolyak algorithm. The accuracy, efficiency and convergence property of sparse grid collocation method are investigated by numerical experiments. The analysis shows that stochastic collocation strategy helps to decouple stochastic computations, and all the numerical computation is possible to be implemented by existing deterministic finite element codes. The proposed method provides an efficient way to evaluate the uncertainty of the solute transport in the heterogeneous media.

关键词： stochastic partial differential equations collocation method solute transport uncertainty

MODELING UNCONFINED SEEPAGE FLOW USING THREE-DIMENSIONAL NUMERICAL MANIFOLD METHOD

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Journal of Hydrodynamics 2010年第4期22卷 554-561页

作者： JIANG Qing-hui DENG Shu-shen ZHOU Chuang-bing LU Wen-bo School of Civil engineering Wuhan University Wuhan 430072 China state key laboratory of water resources and hydropower engineering science Wuhan University Wuhan 430072 China

Three-dimensional numerical manifold method for unconfined seepage analysis is proposed in this *** constructing hydraulic potential functions of the manifold element,the element conductivity matrix and the global simultaneous equations for unconfined seepage analysis are derived in *** algorithm of locating the free surface and the formula for seepage forces are also ***-dimensional manifold method employs the tetrahedral mathematical meshes to cover the whole material *** the iterative process for locating the free surface,the manifold method can achieve an accurate seepage analysis of the saturated domain below the free surface with mathematical meshes *** the shape of manifold elements can be arbitrary,the disadvantage of changing the permeability of transitional elements cut by the free surface in the conventional Finite Element Method（FEM） is removed,and the accuracy of locating the free surface can be ***,the seepage force acting on the transitional elements can be accurately calculated by the simplex *** results for a typical example demonstrate the validity of the proposed method.

关键词： three-dimensional seepage numerical manifold method free surface mathematical mesh manifold element