Abstract

The paper deals with problem of groundwater sustainable exploitation in accordance with the allowable drawdown, stipulated in Circular 27/2014/TT-BTNMT of Ministry of Natural Resources and Environment in combination with the sustainablity index, advised by UNESCO. The technical method is using a groundwater model containing reliable input data. As a result, a groundwater flow model was successfully constructed for stimulating the actual groundwater system in Con Son Island. The model was calibrated, using groundwater monitoring data of 12 wells and produced an error less than ±0.5m. On the basis of the current model, a prediction was made under condition of climate change and sea level rise up to the scenario RCP 4.5. Based on this prediction, the exploitable groundwater reserve of Con Son island was calculated as 14.430m3/day.