Estimation of groundwater storage loss for the Indian Ganga Basin using multiple lines of evidence.

ABSTRACT: We used remote sensing data, field observations and numerical groundwater modelling to investigate long-term groundwater storage losses in the regional aquifer of the Ganga Basin in India. This comprised trend analysis for groundwater level observations from 2851 monitoring bores, groundwater storage anomaly estimation using GRACE and Global Land Data Assimilation System (GLDAS) data sets and numerical modelling of long-term groundwater storage changes underpinned by over 50,000 groundwater level observations and uncertainty analysis. Three analyses based on different methods consistently informed that groundwater storage in the aquifer is declining at a significant rate. Groundwater level trend indicated storage loss in the range - 1.1 to - 3.3 cm year^-1 (median - 2.6 cm year

SUBMITTER: Janardhanan S 

PROVIDER: S-EPMC9889759 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature