西沙永兴岛不同功能区环境质量状况研究

Study on Environmental Quality in Different Functional Areas of Yongxing Island, Xisha

永兴岛的建设和开发在岛内形成不同的功能区,不同功能区因受人为活动的影响不同而导致其环境质量状况存在差异。该研究通过对永兴岛生态保育区和港口建设区2个典型功能区的海水水质和土壤采样分析,发现永兴岛的建设和开发对环岛海水水质和岛上土壤均产生一定的影响,港口建设区水土环境质量明显劣于生态保育区,海水无机氮含量超标严重,环岛水质具有富营养化的趋势。岛内存在土壤重金属污染,潜在生态危害指数评估结果显示土壤重金属具有极强生态危害。

With further construction and development,Yongxing Island had formed different functional zones with different environmental quality conditions due to influences of human activities.This study analyzes the seawater and soil qualities in two typical functional areas,which were Ecological Conservation Area and Port Construction Area.The results show that construction and development of Yongxing Island had certain effects on water quality and soil health of the island.The quality of water and soil environment in port construction area were obviously inferior to those of ecological conservation area.Contents of inorganic nitrogen in seawater were seriously exceeded,and seawater quality around the island was eutrophic.Heavy metal pollutions were found in the soil,and the results of potential ecological hazard index showed that soil heavy metals had extremely strong ecological hazards.