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首页> 外文学位 >Streamflow simulation using a physically based hydrologic model in humid forested watersheds.
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Streamflow simulation using a physically based hydrologic model in humid forested watersheds.

机译：在潮湿的森林流域中使用基于物理的水文模型进行流量模拟。

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摘要

The overall objective of this study was to test the response of the modified TOPMODEL under extremely steep topography and intense precipitation in humid forested watersheds in Taiwan. Two periods were chosen for the model calibration and validation. A typhoon season with 6 typhoon events in 1994 was selected to examine this model's response. In order to determine the effects of spatial variability on streamflow simulation, 5 grid sizes of DEM data, 10-, 20-, 30-, 40-, and 50-meter, and 2 flow direction algorithms, single and multiple, were used in this study. Results showed that this modified TOPMODEL is suitable for simulating streamflow in the Fu-Shan watersheds in Taiwan. Both model calibration and validation runs, on a daily basis, produced good fits, where model efficiencies were between 0.82 and 0.96. Even under intense rainfall on an hourly basis, model efficiencies varied from 0.61 to 0.96 for 6 individual typhoon events and 0.94 for the entire 1994 typhoon season. Although different grid sizes and flow direction algorithms generated various topographic index distributions, the simulated results were virtually identical when the model parameters were optimized. According to streamflow simulation with the modified TOPMODEL, subsurface flow accounted for 86.1% and 87.6% of the total simulated streamflow during the calibration and validation periods for the Fu-Shan No. 1 watershed (38 ha), and accounted for 85.1% and 86.6% for the Fu-Shan No.2 watershed (94 ha).
机译：这项研究的总体目的是测试台湾TOPMODEL在极端陡峭的地形和强降雨条件下在台湾潮湿的森林流域中的响应。选择两个周期进行模型校准和验证。选择了1994年的台风季节和6次台风事件来检查该模式的响应。为了确定空间可变性对水流模拟的影响，在DEM数据中使用了5种网格大小的10米，20米，30米，40米和50米，以及2种单向和多向流向算法。这项研究。结果表明，这种改进的TOPMODEL适用于模拟台湾福山流域的水流。每天进行模型校准和验证都会产生良好的契合度，模型效率在0.82至0.96之间。即使在每小时大雨的情况下，6个台风事件的模型效率也从0.61到0.96，而整个1994年台风季节的模型效率为0.94。尽管不同的网格大小和流向算法会生成各种地形指数分布，但是当优化模型参数时，模拟结果实际上是相同的。根据修改后的TOPMODEL进行的流量模拟，在福山一号流域（38公顷）的标定和验证期间，地下流量分别占模拟总流量的86.1％和87.6％，分别占85.1％和86.6％富山第二流域（94公顷）的百分比。

著录项

  • 作者

    Liaw, Shyue-Cherng.;

  • 作者单位

    Colorado State University.;

  • 授予单位 Colorado State University.;
  • 学科 Hydrology.;Environmental Sciences.
  • 学位 Ph.D.
  • 年度 1998
  • 页码 163 p.
  • 总页数 163
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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