基于不规则三角形网格和有限体积法的物理性流域水文模型

王蕾; 田富强; 胡和平

基于不规则三角形网格和有限体积法的物理性流域水文模型

1.
中国水利水电科学研究院, 北京, 100048;
2.
清华大学水利水电工程系水沙科学与水利水电工程国家重点实验室, 北京, 100048

基金项目: 国家自然科学基金资助项目(50779022)

详细信息

作者简介:
王蕾(1980- ),女,湖北十堰人,工程师,主要从事水文模型、农业节水等研究.E-mail:wanglei1997@tsinghua.org.cn

中图分类号: TV122
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- 文章访问数: 116
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出版历程
- 收稿日期: 2009-08-22
- 刊出日期: 2010-11-24

Physically based hydrological model using finite volume methods based on a triangulated irregular network

1.
Department of Water Resources, China Institute of Water Resources & Hydropower Research, Beijing 100048, China;
2.
Department of Hydraulic Engineering, State Key Laboratory of Hydro-Science and Engineering, Tsinghua University, Beijing 100084, China

Funds: The study is financially supported by the National Natural Science Foundation of China(No.50779022).

摘要

摘要: 传统的栅格离散方式不能很好反映流域水文过程的边界特征,且难以实现流域水文过程的多尺度模拟.采用有限体积法构建了基于不规则三角形网格的物理性水文模型,将物理性描述的偏微分方程组在控制体积内积分得到空间半离散的常微分方程组,保证数值求解中的水量平衡,并可与概念性描述部分水文过程(如截留、填洼等)的常微分方程组更好地耦合;建立了数值求解方案,采用Triangle对计算区域进行离散,并在沁河上游流域进行了验证,结果表明模型具有较高的模拟精度和良好的应用前景.
- 物理性水文模型 /
- 三角形网格 /
- 有限体积法 /
- 水文模拟
Abstract: The physically based hydrological models are based on the physical descriptions of water movement within the overland,river channel and soil,which makes it promising that the hydrological modeling depends less on the calibration of watershed responses while depends more on the observations and measurements of clmiate and landscape themselves.The spatial discre tization is the very first step in the development of physically based models,and at the same time,it is also the principle way to represent the spatial heterogeneity of landscape properties such as topogra phy,soil,vegetation,etc.The grid based method for spatiald iscretization is one of most commonly used ways for its smiplicity.However,the method cannot represent the heterogeneity in a realistic and efficient manner,and most importantly,the gird based models may not be suitable for the modeling of multiscale hydrological rocesses.In this study,a physically based hydrological model is developed on a triangu lated irregular network(TIN).The model partial different equations(PDEs) derived at micro scales include the Richards equation and Saint Venant equations.The model is resolved numerically using the finite volume method(FVM) that can integrate the PDEs over the controlling space into ordinary differential equations(ODEs).The use of FVM can ensure the balancing of watermass in the numerical solution,as well asmakes it easier when coupling to other ODEs of canopy interception and ground depression.The model is tested over the upper region of the Qin river basin.The results show the reasonable modeling accuracy and efficiency.
- physically based hydrological model /
- triangu lated irregu lar newtork /
- finte volume method /
- hydrological modeling

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参考文献(14)

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文章访问数: 116
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基于不规则三角形网格和有限体积法的物理性流域水文模型

作者简介: 王蕾(1980- ),女,湖北十堰人,工程师,主要从事水文模型、农业节水等研究.E-mail:wanglei1997@tsinghua.org.cn

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Physically based hydrological model using finite volume methods based on a triangulated irregular network

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出版历程

目录

作者简介:
王蕾(1980- ),女,湖北十堰人,工程师,主要从事水文模型、农业节水等研究.E-mail:wanglei1997@tsinghua.org.cn