The influence of physical catchment properties on baseflow in semi-arid environments
The influence of physical catchment properties on baseflow in semi-arid environments
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DOI：
10.1006/jare.2001.0947
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发表时间：
2002-10-01
影响因子：
2.7
通讯作者：
Wyseure, G
中科院分区：
文献类型：
--
作者：
Mwakalila, S;Feyen, J;Wyseure, G
本文研究了半干旱环境下集水区物理性质对基流的影响。它将基于数据的机制建模方法得到的无量纲量、基流指数（BFI）与代表地形、地质和气候特征的无量纲指数联系起来。从检验和相关分析，通过逐步回归和多元回归整理，利用一系列技术推导出两者之间的关系。BFI与气候和地质有着密切的关系。雨量大或蒸发蒸腾量低的集水区下覆花岗岩或玄武岩，基底流高。在测试的地形参数中，排水密度指数与BFI有较强的关系。本文所采用的方法为以排水密度、地质和气候指数为关键因子的半干旱集水区基流估算提供了一种可行的替代方法。(C) 2002 Elsevier Science Ltd.
The present paper examines the influence of physical catchment properties on baseflow in semi-arid environments. It relates the dimensionless quantity, baseflow index (BFI) derived from data-based mechanistic modelling approach to dimensionless indices representing topographic, geologic and climatic properties. The relationship is derived using a progression of techniques, from inspection and correlation analysis, through stepwise regression and finishing with multiple regression. The BFI has a strong relationship with climate and geology. Catchments with high rainfall or low evapo-transpiration underlain with granites or basalt tend to give high baseflow. Within the topographical parameters tested, drainage density index has strong relationship with BFI. The approach used in this paper provides a viable alternative for baseflow estimation on ungauged semi-arid catchments using drainage density, geology and climate indices as key factors. (C) 2002 Elsevier Science Ltd.