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Improving assessment of groundwater-resource sustainability with deterministic modelling: a case study of the semi-arid Musi sub-basin, South India
- Source :
- Hydrogeology Journal, 21(7), 1567-1580, Hydrogeology Journal 21 (2013) 7
- Publication Year :
- 2013
- Publisher :
- Springer Science and Business Media LLC, 2013.
-
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-km(2) 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.
- Subjects :
- India
WASS
Aquifer
hyderabad
Water supply
recharge
Hard-rock aquifer
Earth and Planetary Sciences (miscellaneous)
integrated assessment
climate
Water Science and Technology
Hydrology
geography
hard-rock aquifers
Hydrogeology
geography.geographical_feature_category
methodology
Groundwater recharge
yield
Water Resources Management
Water resources
Overexploitation
Numerical modelling
Groundwater management
Sustainability
Water resource management
Groundwater model
river-basin
management
water allocation
Groundwater
Subjects
Details
- ISSN :
- 14350157, 14312174, and 19892004
- Volume :
- 21
- Database :
- OpenAIRE
- Journal :
- Hydrogeology Journal
- Accession number :
- edsair.doi.dedup.....d65b45ef3ca0bf650fc2f925af331d4a