Bhanja, Soumendra Nath ， Mukherjee, Abhijit ， Rodell, Matthew
2018 GROUNDWATER OF SOUTH ASIA 2018 null(卷), null(期), (49-59页)
In recent years, intense abstraction of groundwater has led to depletion in groundwater storage (GWS) in India, the second most populous country in the world. In this chapter, we demonstrate our work on estimating groundwater storage over India by using data from the Gravity Recovery and Climate Experiment (GRACE) satellite mission to study long-term (2003-2014) change in GWS over India. Rapid depletion of GWS is observed in the Indus-Ganges River basin in the northern and eastern parts of the Indian subcontinent at rates of about -1.25 +/- 0.14 (-12.56 +/- 1.37 km(3)/year) and -1.05 +/- 0.35 cm/year (-13.12 +/- 4.36 km(3)/year), respectively. The fertile alluvial plains of this semiarid basin support huge areas of irrigated agriculture, leading to depletion of GWS. On the other hand, the southern and western parts exhibit groundwater replenishment.