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Spatio-temporal changes in terrestrial water storage in the Himalayan river basins and risks to water security in the region: A review

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Title Spatio-temporal changes in terrestrial water storage in the Himalayan river basins and risks to water security in the region: A review
Not Available
 
Creator Shamsudduha, M.
Panda, D.K
 
Subject Himalayan river basins Terrestrial water storage Groundwater abstraction Climate change South Asia
 
Description Not Available
ABSTRACT
Nearly one-fifth of the Earth's accessible freshwater is stored in the densely-populated, alluvial floodplains of the
Brahmaputra, Ganges, Indus, Irrawaddy and Meghna River Systems in the Himalayan region where extreme
hydrological conditions exist due to the seasonal variability in terrestrial water storage (TWS). Groundwater
storage (GWS) – a hidden resource underneath the land surface, plays a critical role in sustaining irrigated
agriculture in these river basins, particularly during the dry season when rice crops are generally grown in
irrigated lands across South Asia. Although monitoring of groundwater levels has been operational in the region
for a number of decades, a basin-wide comprehensive assessment of GWS is lacking in most river basins. The
NASA's Gravity Recovery and Climate Experiment (GRACE) twin satellites offer an opportunity to map basinwide changes in GWS where in-situ observations are limited in time and space. GRACE-derived assessments of
GWS vary substantially in these basins and have not been reconciled with in-situ observations in most cases.
Recent declining trends in GWS over the Himalayan river basins are attributed primarily to over-abstraction of
groundwater due to dry-season irrigation. Seasonal variability in terrestrial water is likely to increase or become
unpredictable in the future as a result of increased climate variability. The consequent impacts may potentially
threaten the security of water supply and food in the region, where there is currently a growing demand for food
grains from irrigated agriculture, energy, and domestic and industrial water supplies.
Not Available
 
Date 2019-11-06T08:09:18Z
2019-11-06T08:09:18Z
2018-01-16
 
Type Article
 
Identifier Shamsudduha, M. and Panda, D.K. 2019. Spatio-temporal changes in terrestrial water storage in the Himalayan river basins and risks to water security in the region: A review. International Journal of Disaster Risk Reduction, 35, 101068
ISSN: 2212-4209
http://krishi.icar.gov.in/jspui/handle/123456789/24516
 
Language English
 
Relation Not Available;
 
Publisher Elsevier