Incorporation of groundwater losses and well level data in rainfall-runoff models illustrated using the PDM
Incorporation of groundwater losses and well level data in rainfall-runoff models illustrated using the PDM
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DOI：
10.5194/hess-6-25-2002
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发表时间：
2002-02
影响因子：
6.3
通讯作者：
R. Moore;V. Bell
中科院分区：
文献类型：
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作者：
R. Moore;V. Bell
间歇性径流在可渗透集水区中很常见，特别是在有抽水取水的地方。许多径流模型没有制定，以代表短暂的径流行为或允许负补给地下水抽水产生的可能性。地下水模型组件在这里制定用于扩展现有的地下水径流模型，以适应这种短暂的行为。从地下水存储的概念模型的霍顿-伊扎德方程的解决方案进行了调整和非线性存储的形式扩展，以适应负输入，水存储低于流出停止，和损失的外部泉水和下溢以下的计量集水出口。地下水模型的组成部分，通过使用它作为一个扩展的PDM的地下水径流模型进行了说明。它被应用到河Lavant，在英格兰南部的集水区的英语粉笔，在那里它成功地模拟了短暂的径流行为和洪水响应以及水位变化。关键词：地下水，径流模型，短河流，水位，泉水，抽取
Intermittent streamflow is a common occurrence in permeable catchments, especially where there are pumped abstractions to water supply. Many rainfall-runoff models are not formulated so as to represent ephemeral streamflow behaviour or to allow for the possibility of negative recharge arising from groundwater pumping. A groundwater model component is formulated here for use in extending existing rainfall-runoff models to accommodate such ephemeral behaviour. Solutions to the Horton-Izzard equation resulting from the conceptual model of groundwater storage are adapted and the form of nonlinear storage extended to accommodate negative inputs, water storage below which outflow ceases, and losses to external springs and underflows below the gauged catchment outlet. The groundwater model component is demonstrated through using it as an extension of the PDM rainfall-runoff model. It is applied to the River Lavant, a catchment in Southern England on the English Chalk, where it successfully simulates the ephemeral streamflow behaviour and flood response together with well level variations. Keywords: groundwater, rainfall-runoff model, ephemeral stream, well level, spring, abstraction