A sensitivity analysis of Hortonian flow

被引：43

作者：

Delfs, J. -O. ^{[1
,2
]}

Park, C. -H. ^{[1
]}

Kolditz, O. ^{[1
,3
]}

机构：

[1] UFZ Helmholtz Ctr Environm Res, Helmholtz Ctr Environm Res, Dept Environm Informat, D-04318 Leipzig, Germany

[2] Univ Tubingen, Ctr Appl Geosci, D-72074 Tubingen, Germany

[3] Tech Univ Dresden, Dresden, Germany

来源：

ADVANCES IN WATER RESOURCES | 2009年 / 32卷 / 09期

关键词：

Sensitivity analysis; Smith and Woolhiser experiment; Coupled hydrosystem modeling; Infiltration excess overland flow; HETEROGENEOUS POROUS-MEDIA; OVERLAND-FLOW; SHALLOW-WATER; NUMERICAL-MODEL; SURFACE; TRANSPORT; DYNAMICS; PLANE; SCALE; ZONE;

D O I：

10.1016/j.advwatres.2009.06.005

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

We present a sensitivity analysis for infiltration excess (Hortonian) overland flow based on a classic laboratory experiment by Smith and Woolhiser [Smith RE, Woolhiser DA. Overland flow on an infiltrating surface. Water Resour Res 1971;7(4):899-913]. The model components of the compartment approach are comprised of a diffusive wave approximation to the Saint-Venant equations for overland flow, a Richards model for flow in the variably saturated zone, and an interface coupling concept that combines the two components. In the coupling scheme a hydraulic interface is introduced to allow the definition of an exchange flux between the surface and the unsaturated zone. The effects of friction processes, soil capillarity, hydraulic interface, and vertical soil discretization on both infiltration and runoff prediction are investigated in detail. The corresponding sensitivity analysis is conducted using a small-perturbation method. As a result the importance of the hydraulic processes and related parameters are evaluated for the coupled hydrosystem. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1386 / 1395

页数：10

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