Field measurement of soil moisture dynamics and numerical simulation using the kinematic wave approximation
Field measurement of soil moisture dynamics and numerical simulation using the kinematic wave approximation
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DOI：
10.1016/j.advwatres.2005.02.010
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发表时间：
2005-09
影响因子：
4.7
通讯作者：
A. Rezzoug;A. Schumann;P. Chifflard;H. Zepp
中科院分区：
文献类型：
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作者：
A. Rezzoug;A. Schumann;P. Chifflard;H. Zepp
本文研究了平面曲率和剖面曲率对田间试验获得的土壤水分分布和相关通量的影响。今天，还需要用真实的现场测量来确认运动波近似的理论方法。在一个研究项目，致力于基于模型的描述径流形成过程中，土壤水分动态和数值模拟的实地测量，使用一个简单制定的运动波模型相结合。结果表明，测量的土壤水分运动的山坡内向下可以解释的运动波模型，反之亦然，该模型如何可以验证其物理解释的实地测量。结果表明，坡面土壤水分通量可以用穿过土壤表层的运动波来描述。基于这些分析，它表明，两个地形特征，平面和剖面曲率的山坡控制地下水和饱和流。所得结果与Fan和布拉斯[Fan Y，布拉斯RL.山坡次表层暴雨流与饱和坡面流之解析解。Water Resour Res 1998;34（4）：921-7]，Troch等人[Troch PA，Paniconi C，货车Loon EE，Bijkerk B，Hilberts A.山坡储存Boussinesq模式对地下暴雨流和饱和地表流的特性。International Workshop on Catchment，Wageningen 2000; Poster] and Troch et al. [Troch PA，货车Loon C，Hilberts A.地下水流山坡蓄水运动波动方程的解析解。Adv Water Resour 2002;25：637-49]，这些研究在使用运动波近似的建模方面取得了相当大的进展。
We investigate in this paper the effect of plane and profile curvatures on the soil moisture distribution and related fluxes obtained from field experiments. Today, there is a need also to confirm the theoretical approaches of the kinematic wave approximation with the real field measurements. Within a research project dedicated to the model-based description of runoff formation processes, field measurements of soil moisture dynamics and numerical simulation, using one simply formulated kinematic wave model, are combined. It is shown that the measurement of the soil moisture movement downwards within a hillslope can be interpreted by the kinematic wave model and vice versa how the model can be validated in its physical explanations by the field measurements. It is revealed that the soil moisture fluxes can be described by kinematic waves crossing the soil mantle of the hillslope. Based on these analyses it is shown that the two topographic characteristics plane and profile curvatures of the hillslope control the subsurface and saturation flow. The obtained results are related to the previous theoretical analysis of Fan and Bras [Fan Y, Bras RL. Analytical solutions to hillslope subsurface storm flow and saturation overland flow. Water Resour Res 1998;34(4):921–7], Troch et al. [Troch PA, Paniconi C, van Loon EE, Bijkerk B, Hilberts A. Behaviour of a hillslope-storage Boussinesq model for subsurface storm flow and saturation overland flow. International Workshop on Catchment, Wageningen 2000; Poster] and Troch et al. [Troch PA, van Loon C, Hilberts A. Analytical solutions to a hillslope-storage kinematic wave equation for subsurface flow. Adv Water Resour 2002;25:637–49] which have shown considerable progress in the modelling using the kinematic wave approximation.