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首页> 外文期刊>Journal of the American Water Resources Association >RUNOFF MODELING OF A MOUNTAINOUS CATCHMENT USING TOPMODEL: A CASE STUDY
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RUNOFF MODELING OF A MOUNTAINOUS CATCHMENT USING TOPMODEL: A CASE STUDY

机译：基于TOPMODEL的山地流域径流建模：案例研究。

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摘要

The rainfall-runoff response of the Tygarts Creek Catchment in eastern Kentucky is studied using TOPMODEL, a hydrologic model that simulates runoff at the catchment outlet based on the concepts of saturation excess overland flow and subsurface flow. Unlike the traditional application of this model to continuous rainfall-runoff data, the use of TOPMOEL in single event runoff modeling, specifically floods, is explored here. TOPMODEL utilizes a topographic index as an indicator of the likely spatial distribution of rainfall excess generation in the catchment. The topographic index values within the catchment are determined using the digital terrain analysis procedures in conjunction with digital elevation model (DEM) data. Select parameters in TOPMODEL are calibrated using an iterative procedure to obtain the best-fit runoff hydrograph. The calibrated parameters are the surface transmissivity, T_o, the transmissivity decay parameter, m, and the initial moisture deficit in the root zone, S_(r0). These parameters are calibrated using three storm events and verified using three additional storm events. Overall, the calibration results obtained in this study are in general agreement with the results documented from previous studies using TOPMODEL. However, the parameter values did not perform well during the verification phase of this study.
机译：使用TOPMODEL研究肯塔基州东部Tygarts Creek流域的降雨-径流响应，TOPMODEL是一种基于饱和过剩陆上水流和地下水流的概念模拟流域出口处径流的水文模型。与该模型在连续降雨径流数据中的传统应用不同，这里探讨了在单事件径流模型（特别是洪水）中使用TOPMOEL。 TOPMODEL利用地形指数作为集水区降雨过量生成可能的空间分布指标。流域内的地形指数值是使用数字地形分析程序结合数字高程模型（DEM）数据确定的。使用迭代过程校准TOPMODEL中的选择参数，以获得最合适的径流水位图。校准的参数是表面透射率T_o，透射率衰减参数m和根部区域的初始水分亏缺S_（r0）。这些参数使用三个风暴事件进行校准，并使用三个附加风暴事件进行验证。总体而言，本研究中获得的校准结果与以前使用TOPMODEL进行的研究记录的结果总体上是一致的。但是，在此研究的验证阶段，参数值表现不佳。

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