Responses of groundwater to precipitation variability and ENSO in the Vietnamese Mekong Delta

• DOI: 10.2166/nh.2021.024
• Publication Date: 2021-09-13T18:19:20Z
• Authors: Phong V. V. Le; Hai V. Pham; Luyen K. Bui; Anh N. Tran; Chien V. Pham; Giang V. Nguyen; Phuong A. Tran
• Keywords: Mekong Delta

Abstract Groundwater is a critical component of water resources and has become the primary supply for agricultural domestic uses in Vietnamese Mekong Delta (VMD). Widespread groundwater level declines have occurred VMD over recent decades, reflecting that extraction rates exceed aquifer recharge region. However, impacts climate variability on system dynamics remain poorly understood. Here, we explore changes levels shallow deep aquifers from observed wells investigate their relations to annual precipitation El Niño–Southern Oscillation (ENSO). We show responds at time scales approximately 1 year. Moreover, (deep) appears correlate with ENSO intra-annual (inter-annual) scales. Our findings reveal linkage between variability, suggesting need develop an understanding across VMD.