Title

Improving assessment of groundwater-resource sustainability with deterministic modelling: A case study of the semi-arid Musi sub-basin, South India [Amélioration de l'évaluation de la pérennité de la ressource en eau souterraine à l'aide d'une modélisation déterministe: Cas du sous-bassin semi aride Musi, Inde du Sud]

Document Type

Journal Article

Publisher

Springer Verlag

Faculty

Faculty of Health, Engineering and Science

School

School of Computer and Security Science

Comments

This article was originally published as: Massuel, S., George, B. A., Venot, J.-P., Bharati, L. & Acharya, S. (2013) Improving assessment of groundwater-resource sustainability with deterministic modelling: A case study of the semi-arid Musi sub-basin, South India. Hydrogeology Journal 21(7), 1567-1580. The final publication is available at Springer via here

Abstract

Since the 1990s, Indian farmers, supported by the government, have partially shifted from surface-water to groundwater irrigation in response to the uncertainty in surface-water availability. Water-management authorities only slowly began to consider sustainable use of groundwater resources as a prime concern. Now, a reliable integration of groundwater resources for water-allocation planning is needed to prevent aquifer overexploitation. Within the 11,000-km2 Musi River sub-basin (South India), human interventions have dramatically impacted the hard-rock aquifers, with a water-table drop of 0.18 m/a over the period 1989-2004. A fully distributed numerical groundwater model was successfully implemented at catchment scale. The model allowed two distinct conceptualizations of groundwater availability to be quantified: one that was linked to easily quantified fluxes, and one that was more expressive of long-term sustainability by taking account of all sources and sinks. Simulations showed that the latter implied 13 % less available groundwater for exploitation than did the former. In turn, this has major implications for the existing water-allocation modelling framework used to guide decision makers and water-resources managers worldwide.

DOI

10.1007/s10040-013-1030-z

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