부산대학교 도서관

The reliable quantification of Groundwater Recharge (GR) is essential for efficient and sustainable groundwater resource practices. In this study, the spatio-temporal GR over the Ganga River Basin (GRB) was calculated using six different methods during 2003–2016. The Gravity Recovery and Climate Experiment (GRACE) and water fluxes were utilized as inputs to the GR methods. The GR of individual methods were validated with in-situ measurements, indicating a higher correlation ranged from 0.64 to 0.77. Overall, the GR trend shows an insignificant declining trend with a mean of −0.09 cm yr−1 for all selected methods. The spatial distribution of GR indicates large heterogeneity in the GRB with a higher recharge in the eastern than the western part. The uncertainty of each method and sensitivity of water fluxes were analyzed. Further, the possible causes of GR change through hydro-climatic variables as well as anthropogenic activities related to irrigation and urbanization were evaluated. [ABSTRACT FROM AUTHOR]