基于PSR模型的江苏沿海大开发地区水环境安全评价——以盐城市为例

Assessment on Water Environment Security in the Coastal Development Region in Jiangsu Based on PSR Model——A Case Study in Yancheng City

水环境安全越来越成为区域经济发展的制约因素。基于PSR构建模型,应用AHP方法,对江苏沿海大开发地区盐城市的水环境安全进行了测度与评价。结果显示:2005—2010年间,盐城市水环境趋于好转,水环境安全指数呈升高趋势,反映了人类积极响应策略的效应。在人口与GDP增长的压力下,工业用水量、废水排放达标率以及环保投入等方面是提高水环境安全的策略切入点。盐城市应优化水资源配置,加快产业结构调整与升级,走新型城市化与工业化道路,降低工业用水消耗,并增加环保投入与森林绿地恢复,从而降低水资源的环境风险。

Water environment security is a key limiting factor in the economic development.Based on the construction of Pressure-State-Response（PSR）model,water environment security is examined and assessed in Yancheng City in the coastal development region in Jiangsu by utilizing the analytic hierarchy process（AHP）weighting method.Assessment results show that there is an increasing trend of the index of the water environment security in Yancheng City,results also reveal that water environment is getting better than before which is resulted in the positive policy on the water environment.With the increasing pressure of population and the GDP increase,industrial water demand,qualified waster water discharge and investment on the environment are the key point for lowering the risk of the water environment.The risk of the water environment can be reduced by optimizing the water resource distribution,accelerating the upgrading of the industry,advancing into a new road to the urbanization and industrialization,decreasing the demand of industrial water consummation,and increasing the investment on the environment and the restoration of the forestland and the green land in Yancheng City.