Characteristics of Hydro-geochemictry and Its Zoning in Hai Duong Urban Area
Main Article Content
Abstract
Abstract: Hai Duong urban area consists of Hai Duong city and its vicinity, covering an area of about 500 km2, located in the center of the Red River Delta with three main aquifers: qh, qp and n. The (qp) and (n) aquifers have significant amount of water potential, meaning that they can be sources for public water supply, but poor water quality that can limit the meaning of water supply. Highlights of water quality are: high level of total dissolved solid, iron content, manganese and nitrogen compounds. In all three aquifers water is saline in most of the area, accounting for 22% to 64% of the area. The risk of salinity intrusion can be happened in all aquifers. For the (qp) aquifer, forecast to 2030, under current water exploitation conditions, salinity intrusion rates may range from 2.7 to 9.3 m per year. In the study area, there are three types of hydro-geochemistry: Type I - All layers of water in the section are fresh; Type II - Top (qh) is fresh, (qp) and (n) aquifers are salinity, in which the (qp)is more salty than the (n) layer and the V-type is saline water in (qh) and (qp) aquifers, in the (n) aquifer water is fresh. The I type is normal of hydro-geochemistry; The V type is inverseof hydro-geochemistry due to (n) aquifer which its recharge is far from. In the II type there are both normal and invers of hydro-geochemistry due.
Keywords: Water quality, aquifer, hydro-geochemical zoning, salinity intrusion.
References
[1] Nguyen Kim Ngoc et al. (2005). Geochemical chemistry: Transportation Publishing House Company Limited. Hanoi 2005, pp. 32-38 and 106-108.
[2] Hoang Van Duy (2017). Study on the hydro-geochemical characteristics of Hai Duong urban area, Master thesis, Archives of University of Mining and Geology, pages 40-96.
[3] Nguyen Van Dan, Nguyen Thi Dung (2004). Groundwater contamination in Hanoi, Journal of Geology A / 280-1-2 / 2004, Hanoi 2004, pp. 48-57.
[4] Nguyen Van Dan et al. (2015). Geological, hydrological and geochemical features of coastal areas in Vietnam, Journal of Marine Science and Technology, 334-340, Hanoi, pp. 334-340.
References
[1] Nguyen Kim Ngoc et al. (2005). Geochemical chemistry: Transportation Publishing House Company Limited. Hanoi 2005, pp. 32-38 and 106-108.
[2] Hoang Van Duy (2017). Study on the hydro-geochemical characteristics of Hai Duong urban area, Master thesis, Archives of University of Mining and Geology, pages 40-96.
[3] Nguyen Van Dan, Nguyen Thi Dung (2004). Groundwater contamination in Hanoi, Journal of Geology A / 280-1-2 / 2004, Hanoi 2004, pp. 48-57.
[4] Nguyen Van Dan et al. (2015). Geological, hydrological and geochemical features of coastal areas in Vietnam, Journal of Marine Science and Technology, 334-340, Hanoi, pp. 334-340.