GROUNDWATER FLOW MODEL OF BAC BINH AREA

Abstract

Groundwater system in the Bac Binh area can be simulated as two layers system. Layer 1 presents for the unconfined aquifer which is the product aquifer of the area. Layer 2 represents for the weathered zone and bedrock which is considered as an aquitard. Results of the model shows that the groundwater flows from the high elevation area at the center of the study area to surrounding areas in rainy season. Groundwater flows to Luy Van Cai rivers to the north and the west. At the south, groundwater drains to the seashore. At the northern parts of lakes TaZon, Bau Noi, Bau Ong, Bau Ba, groundwater supplies water for the lakes while lake water recharges for groundwater at the southern parts. Unsteady state model also shows that the total potential reserves is 109,505 m³/d, and safety reserves is 42,708m³/d in dry season while those of rainy season are 467,214 m³/d and 201,340 m³/d, respectively.