A base flow separation algorithm based on the linearized Boussinesq equation for complex hillslopes
A base flow separation algorithm based on the linearized Boussinesq equation for complex hillslopes
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DOI：
10.1029/2004wr003789
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发表时间：
2005-08
影响因子：
5.4
通讯作者：
Annelies Huyck;V. Pauwels;N. Verhoest
中科院分区：
文献类型：
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作者：
Annelies Huyck;V. Pauwels;N. Verhoest
基流量与流量记录的分离是水文学中的一个重要问题。本文的目的是开发一种基于地下水理论的基流分离算法，该算法考虑了含水层的形状，其参数可以通过河流流量测量来估计。为此，推导了实际含水层形状和时间变化补给率的线性化Boussinesq方程的解析解。将此解与陆面质量平衡相结合，构造了基流分离算法。基流过滤器的参数是根据相同的解析解计算的。将新算法的结果与现有的基流分离方法进行了比较，表明需要为基流过滤器建立物理基础。
The separation of base flow from discharge records is an important issue in hydrology. The objective of this paper is to develop a base flow separation algorithm, based on groundwater theory, in which the shape of the aquifer is taken into account and for which the parameters can be estimated from river discharge measurements. For this purpose, an analytical solution to the linearized Boussinesq equation for realistic aquifer shapes and temporally variable recharge rates is derived. This solution is combined with a mass balance at the land surface in order to construct the base flow separation algorithm. The parameters of the base flow filter are calculated on the basis of the same analytical solution. Comparison of the results of the new algorithm to existing base flow separation methods shows the need for a physical basis for base flow filters.