深圳沿岸海水入侵灾害现状研究

Status of seawater intrusion into coastal area of Shenzhen

2008年8月～2009年8月期间对深圳沿海岸18个海水入侵观测站位进行地下水水质连续监测，选用矿化度、Cl^-1、SO4^2-、rCl^-：rHCO3、K^＋指标作为评价因子，运用模糊数学方法对区内海水入侵现状做出综合评价。结果能较客观准确地反映调查区域的海水人侵趋势和程度，评价结果与代表性指标氯度和矿化度浓度变化有很好的相关性。结果显示总体上说目前深圳沿岸的多数地区海水入侵程度不大，但在局部地区入侵状况严重。

Based on the data of the groundwater quality monitored semimonthly for one year at 18 stations along the coastal area of Shenzhen city,the comprehensive judgment method in fuzzy mathematics was applied to study the seawater intrusion status into these areas. The five hydro-chemical parameters including mineralization degree, Cl^-, SO4^2-, rCl-： rHCO3, and K ^＋ in the groundwater were selected as the assessment factors to delineate the seawater intrusion in different aspect. The assessment result could reflect the level and trend of seawater intrusion more correctly. Fortunately, the seawater intrusion could be avoided in most of costal area of Shenzhen, however, the serious intrusion still occurs in some zones closed to sea or the river mouth.