Using GMS modeling method: calculation of potential exploitation of groundwater in Bac Lieu Province, Vietnam

Hoai Thu Trinh; Nhu Trung Nguyen; Thi Thuy Huong Tran; Renat Shakirov

doi:10.15625/1859-3097/22789

Author affiliations

Authors

Trinh Hoai Thu Institute of Earth Sciences, VAST, Vietnam https://orcid.org/0009-0000-6297-217X
Nguyen Nhu Trung Institute of Earth Sciences, VAST, Vietnam
Tran Thi Thuy Huong Institute of Earth Sciences, VAST, Vietnam https://orcid.org/0009-0007-1211-6587
Renat Shakirov Il'ichev Pacific Oceanological Institute, Vladivostok, Russia

DOI:

https://doi.org/10.15625/1859-3097/22789

Keywords:

Potentially exploitable reserves, groundwater, middle-upper Pleistocene aquifer (qp2–3), lower Pleistocene (qp1), GMS model, Bac Lieu Province

Abstract

The paper presents the results of research on assessing and determining the potential groundwater exploitation reserves in Bac Lieu Province, the middle-upper Pleistocene aquifer (qp_2–3) and the lower Pleistocene aquifer (qp₁) using a numerical model. The authors used GMS (Groundwater Modeling System) software to model aquifers, assign calibrated hydrogeological parameter values, input water level and exploitation data up to 2030, and determine groundwater reserves, sources of groundwater reserves, and water level reductions. Model results show that the water level of the qp_2–3 aquifer in 2030 at the monitoring borehole Q597030 is -14.5 m, lower than in 2011, 2015, and 2023 by 7.98, 6.07, and 0.502, respectively. Similarly, for the qp₁ aquifer, the water level at monitoring borehole Q597040 is -15.994 m, lower than 2011, 2015, and 2023 by 6.93, 5.885, and 1.994, respectively. The potentially exploitable reserves of fresh and saline groundwater of the qp_2–3 aquifer in 2023 and 2030 will decrease by 3,120.6 and 527.35 m³/day, respectively. The total potential exploitable reserves of the qp_2–3 aquifer in 2023 and 2030 will be 409,937.37 and 406,279.35 m³/day, respectively. The potential exploitable reserves of the qp₁ aquifer in the freshwater area in 2023 and 2030 will decrease by 6,077.08 m³/day. The potentially exploitable reserves of the qp₁aquifer in 2023 and 2030 will be 74,603.69 and 68,526.61 m³/day, respectively. Based on the results of the study on potential exploitable groundwater reserves in the study area, this approach is applied to effectively manage and plan groundwater exploitation in Bac Lieu province.

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