丹东海水入侵区域地下水同位素特征分析

Characteristic Analysis of Isotopes in Groundwater in Seawater Intrusion Area of Dandong

丹东沿海地区海水入侵逐年加剧,入侵面积达到593km2。监测区域地下水和补给源同位素值,分析内陆地下水和入侵区地下水同位素特征,认为内陆地下水由大气降水补给,入侵区地下水受海水补给。结合化学法监测参数,分析入侵区地下水不同离子与同位素的相关关系,根据物质守恒原理,由相关系数R2的大小分析水岩反应,科学评价海水入侵的影响。

the seawater intrusion situation in coastal Dandong area is increasingly severe year by year and the intrusion area has reached to 593 km2.the isotopic value of underground water and supply resources is monitored,and the isotopic characteristics of inland underground water and seawater intrusion area are analyzed.It is proposed that the inland underground water is supplied by precipitation,while the underground water in intrusion area is replenished by seawater.Based on the chemical monitoring data,the relationship between the isotope and the ions in the intrusion water is analyzed.According to the mixture principle the water-rock reactions are analyzed with R2,thereby the influence of seawater intrusion is evaluated.