TY - JOUR AU - Au Nguyen AU - Nhi Pham Thi Tuyet AU - Minh Vy Tat Hong AU - Linh Luu Khanh AU - Thanh Tran Ngoc PY - 2021/11/20 Y2 - 2024/03/29 TI - Application of GIS-based GADLIT model for vulnerability assessment to seawater intrusion to Aquifer Upper-Middle Pleistocene in Phu My Town, Ba Ria - Vung Tau Province of BaRia - VungTau province JF - Science & Technology Development Journal: Science of the Earth & Environment JA - STDJSEE VL - 5 IS - SI1 SE - Original Research DO - https://doi.org/10.32508/stdjsee.v5iSI1.606 UR - http://stdjsee.scienceandtechnology.com.vn/index.php/stdjsee/article/view/606 AB - Aquifer Upper-Middle Pleistocene (qp2-3) is increasingly exploited in recent years in Phu My town, Ba Ria - Vung Tau province, including the water extraction plant of Phu My - My Xuan with a capacity of 15,000 m3 per day. Several studies have revealed that this aquifer has high total mineralization, and the saline boundary extends into the field, generating an aquifer vulnerability across the town. Our study applied the GIS-base GADLIT model (G-Groundwater occurrence, A-Aquifer hydraulic conductivity, L-Height of groundwater level above sea level, D-Distance from the shore, I-Impact of existing status of seawater intrusion, T-Thickness of aquifer) to identify vulnerable zones of the Aquifer Upper-Middle Pleistocene (qp2-3) in Phu My town for assessment. Based on the results of GALDIT model simulations, maps of Pleistocene aquifer vulnerability were built up following 02 classifications: Zone I indicates its high vulnerability with an area of 5,809 ha corresponding to 25.45% of the total investigated study area whereas; Zone II shows its medium vulnerability that covers 17,020 ha, equivalent to 74.55% of the study area. Notably, there is no low-vulnerability area. Based on the above results and the zoning map of the level of damage to the middle-upper Pleistocens aquifer (qp2-3), it is necessary to limit the construction of new underground water extraction works to avoid the occurrence of aquifers. contain saltwater intrusion. ER -