Application of groundwater modelling for proposing sustainable exploitation of pleistocene aquifer’s fresh water lense in Nam Dinh area

Abstract

     The fresh groundwater lens of the Pleistocene aquifer in Nam Dinh area was formed with an age of up to 12,900 years and is a valuable resource for coastal residents living in this area. Although the groundwater extraction volume is not much 154.163m3 /d compared to the groundwater potential, problems such as groundwater level decline, saline intrusion in this fresh groundwater lens are still problems. The objective of this study is to build flow model and solute transport model and to propose a sustainable groundwater exploitation scenario for the study area. Using a combination of methods including field survey, geophysical, hydrogeochemical, isotopes and numerical modeling, the sustainable groundwater extraction for the whole region has been determined as 544.314 m3 /d without affecting the negative impacts caused by groundwater extraction. This research result is a very good
orientation for sustainable management and exploitation of groundwater