Assessment of Spatiotemporal Groundwater Recharge Distribution Using SWAT-MODFLOW Model and Transient Water Table Fluctuation Method

Recharge is a crucial section of water balance for both surface and subsurface models in resource assessment. However, quantifying its spatiotemporal distribution at regional scale poses significant challenge. Empirical numerical modeling are the most commonly used methods watershed scales. integrated inherently contain vast number unknowns uncertainties, which can limit their accuracy reliability. In this work, we have proposed SWAT-MODFLOW Transient Water Table Fluctuation Method (TWTFM) to evaluate groundwater recharge Anyang watershed, South Korea. Since TWTFM also uses SWAT model percolation output data, calibration was performed individual coupled model. The calibrated using daily streamflow hydraulic head. well during simulation compared study showed that had variations simulated period. A amount happens wet season. It contributes average annual precipitation region. direct flow components (surface lateral) contributions when were evaluated glimpse estimate recharge, requires representative monitoring wells Comprehensively, estimated with reasonable