Kinematic subsurface stormflow
Kinematic subsurface stormflow
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DOI：
10.1029/wr017i005p01419
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发表时间：
1981-10
影响因子：
5.4
通讯作者：
K. Beven
中科院分区：
文献类型：
--
作者：
K. Beven
本文以Henderson和Wooding（1964）的分析为基础，对水力导电性始终不变的倾斜土壤地幔的地下暴雨流简化模型进行了比较。结果表明，对于无量纲参数λ = 4i cos θ/(K sin2θ)小于0.75的值，基于运动波公式的模型可以很好地近似于基于扩展Dupuit-Forchheimier假设的模型，用于预测地下水位剖面和地下暴雨水流线。利用λ的临界值，可以确定斜率角和饱和导水率在运动学近似下的取值范围。在地下暴雨流已被证明是集水区暴雨响应的重要组成部分的现场，与斜坡角和水力导度进行了比较。结果表明，运动学近似对于实际问题是有用的。
This paper builds on the analysis of Henderson and Wooding (1964) in comparing simplified models of subsurface stormflow for the case of a sloping soil mantle in which the hydraulic conductivity is constant throughout. It is shown that models based on a kinematic wave formulation may be good approximations for those based on the extended Dupuit-Forchheimier assumptions for values of the nondimensional parameter λ = 4i cos θ/(K sin2θ) less than about 0.75 in terms of predicting both water table profiles and subsurface stormflow hydrographs. By using this critical value of λ the range of values of slope angle and saturated hydraulic conductivity for which the kinematic approximation is valid can be specified. A comparison is made with slope angles and hydraulic conductivities at field sites where subsurface stormflow has been shown to be an important component of catchment storm response. It is concluded that the kinematic approximation may be useful for cases of practical interest.