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《The Chinese Journal of Geological Hazard and Control》 2014-01
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Seawater intrusion in sandy coast around Liuguhe river in the west of Liaodong bay

WANG Yu-guang;YU Hong-jun;HAN Fu-wei;ZHANG Yi-hui;National Marine Environmental Monitoring Center;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology;  
Based on the field monitoring data,the reasons of the underground water of seawater intrusion and the chemical characteristics of the underground water in Suizhong sandy plain of the west of Liaodong Bay were analyzed. Based on the analysis,the results show the bottom aquifer bed in this area was composed of particulate matter whose water permeability is better like sandy gravel,which is the main thoroughfare of seawater intrusion; Underground water level is affected by season and groundwater exploiting,and the underground water level in median water period drops by 4. 19 meters than that in wet season. The scope and extent of the seawater intrusion affected by the changing of the underground water level. When the level drops in median water period and low water period,the range of seawater intrusion expands and the distance of seawater intrusion is more long 0. 62 kilometers especially in low water period. Moreover,the chemical composition of the groundwater could reflect the extent of seawater intrusion. The water chemical type of S1monitoring well which is mainly Na+—Cl-is same to the seawater chemical type; The water chemical type of S2monitoring well mainly composed of Na+、Ca2 +—Cl-and HCO-3,which is due to the mixing of seawater and freshwater; The water chemical type of S3monitoring well mainly composed of Ca2 +、Mg2 +—HCO-3and SO2-4,which shows the water is fresh water. Meanwhile the content of Na+、Ca2 +、Mg2 +、Cl-and SO2-4and the salinity is more and more small from the S1monitoring well to S3monitoring well.
【Fund】: 环渤海区域海水入侵、土壤盐渍化预警与防控关键技术研究示范(201105020)
【CateGory Index】: P641.8
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