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该文以厦门岛地下水为研究对象 ,研究了地下水中营养盐含量的空间分布和变化。结果表明 2 0 0 1年DIN(无机氮总 -N)含量的变化范围是 2 0 1 2~ 136 8 1μg dm3,PO4 -P含量的变化范围是 9 2~ 1190 0 μg dm3。从 1999年至 2 0 0 0年 ,DIN含量的变化范围是 74~ 2 0 6 8μg dm3,PO4 -P含量的变化范围是 70 9~ 182 5 μg dm3。同时该文将地下水中氯离子作为海水入侵指标 ,根据氯离子背景值确定出海水入侵氯含量指标值。
In this paper, the groundwater in Xiamen Island is taken as the research object to study the spatial distribution and change of nutrient content in groundwater. The results show that the content of DIN (total nitrogen in inorganic nitrogen) varies from 2 0 1 2 to 136 8 1 μg dm 3 in 2001, and the content of PO 4 -P varies from 9 2 to 11 90 0 μg dm 3. From 1999 to 2000, the DIN content ranged from 74 to 206 μg dm3, and the PO4-P content ranged from 70 9 to 182 5 μg dm3. In the meantime, the chloride ion in groundwater is taken as the indicator of seawater intrusion. According to the background value of chloride ion, the indicator value of chlorine content in seawater intrusion is determined.