Abstract
Seawater intrusion caused by groundwater over-exploitation is a kind of geological disaster caused by human economic activities and natural environment changes. Using freshwater recharge curtain technology is an effective means to prevent seawater intrusion. Based on the analysis of the characteristics of seawater intrusion in Pingtan island, Fujian Province, and in view of the possible seawater intrusion problems in the construction of Luyangpu underground reservoir in Pingtan Island, this paper expounds the basic principle of seawater intrusion prevention with freshwater recharge curtain , the technical measures of installing a row of recharge wells in the northern coastal zone of Luyangpu plain in Pingtan Island and using freshwater recharge curtain are put forward to prevent seawater intrusion. Through groundwater numerical simulation, the dynamic distribution of groundwater level in the north of Pingtan Island in the next 20 years is analyzed and predicted. The results show that the seawater intrusion can be effectively prevented by installing freshwater curtain recharge wells in the northern coast of Luyangpu.
Highlights
In recent years, seawater intrusion in coastal zone can not be ignored
Hydraulic curtain and underground dam are most often used in the practice of preventing seawater intrusion
In view of the possible seawater intrusion in Pingtan Island, this paper studies the technical measures to prevent seawater intrusion by using freshwater recharge curtain, and verifies the feasibility of the measures by numerical simulation analysis
Summary
Mengyao Diao 1,*, Panlin Li1,Weifang Ruan2,Wanglin Li1 1University of Jinan,Jinan 250022,China 2Fujian Institute of Water Resources and Hydropower,Fuzhou 350001,China. Using freshwater recharge curtain technology is an effective means to prevent seawater intrusion. Based on the analysis of the characteristics of seawater intrusion in Pingtan island, Fujian Province, and in view of the possible seawater intrusion problems in the construction of Luyangpu underground reservoir in Pingtan Island, this paper expounds the basic principle of seawater intrusion prevention with freshwater recharge curtain , the technical measures of installing a row of recharge wells in the northern coastal zone of Luyangpu plain in Pingtan Island and using freshwater recharge curtain are put forward to prevent seawater intrusion.
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