A Distributed Hydrologic Model of Varying Flow Path Widths with Contributing Areas

Jin Xin; Song Ying; Pan Bin-lin

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A Distributed Hydrologic Model of Varying Flow Path Widths with Contributing Areas

- A Distributed Hydrologic Model of Varying Flow Path Widths with Contributing Areas
- Bulletin of Soiland Water Conservation Vol. 30, Issue 5, Pages: 225-229(2011)
- 作者机构：
  
  桂林理工大学环境科学与工程学院
- 作者简介：
- 基金信息：
- DOI：
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- Published：2011
- 稿件说明：
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Jin Xin, Song Ying, Pan Bin-lin. A Distributed Hydrologic Model of Varying Flow Path Widths with Contributing Areas[J]. Bulletin of Soiland Water Conservation, 2011, 30(5): 225-229.
DOI：

Jin Xin, Song Ying, Pan Bin-lin. A Distributed Hydrologic Model of Varying Flow Path Widths with Contributing Areas[J]. Bulletin of Soiland Water Conservation, 2011, 30(5): 225-229. DOI：

摘要

传统的分布式水文模型在进行汇流计算时

把计算单元沿水流方向的宽度作为汇流宽度

据此得到的水流流速与实际流速有较大差异

造成模型无法输出较为准确的分布式结果

在进行分布式土壤侵蚀模拟或其它与流域产汇流密切相关的研究时

极大地影响相关模拟计算结果。建立了以霍顿下渗公式和简化的圣维南方程为基础的分布式水文模型

在汇流计算中引入汇流宽度曲线

考虑了流域栅格汇流宽度随集水面积的变化。经东湾流域实测资料验证

该模型在分布式结果输出方面具有一定的优势。

Abstract

Grid width is generally treated as the width of flow path for flow convergence in many traditional distributed hydrologic models.The flow velocity obtained from these models differs substantially from the reality

which may undermine immensely the accuracy of the results in hydrologic modeling

soil erosion simulation and other related studies.A distributed hydrologic model was developed based on Horton infiltration curve and simplified Saint Venant equation in this study.A curve called as flow path width curve was developed to describe the varying of flow path width with upstream contributing area as flow gathering.Some observed data of Dongwan watershed was applied to test the model

and the results proved its superiority in distributed outputs.

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