Semi-distributed lumped model of a karst system under active management

Publication Date

2-13-2014

Publication Title

Journal of Hydrology

Volume Number

509

Abstract

In this paper inverse modeling is used to characterize the regime of a karst aquifer subjected to extensive pumping in a conduit located upstream of its main outlet. The systemic approach uses a transfer model that is based on computing the convolution integral of up to several signals, e.g., efficient rainfall, pumping, to simulate flow rates and groundwater levels in both the karst conduit and the carbonate matrix at the aquifer outlet and in several parts of the catchment area. The model is a semi-distributed lumped model which simulates the hydrological response of a heterogeneous karst aquifer made up of different hydrologic compartments, and is applied to the Lez karst system, France. Groundwater is abstracted near the system’s major outlet at a higher rate than the low-water spring discharge, thereby mobilizing stored groundwater during low-water periods (‘active management’).

Keywords

Impulse response; Groundwater flow modeling; Groundwater level fluctuations; Pumping

Document Type

Article

Digital Object Identifier (DOI)

https://doi.org/10.1016/j.jhydrol.2013.11.017

Language

English

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