海城河生态系统健康评价

Health assessment of Haicheng River ecosystem

本文从水域和陆域两个层次构建了含有17项代表性指标的评价体系,将海城河划分为12个评价单元,综合评价其生态系统健康并分析生态环境存在的主要问题。研究表明:海城河生态系统健康评价等级在空间分布上存在一定差异,其中人口较为密集的下游区域评级等级相对较低,而上游区域较高;流域生态系统健康总体属于一般水平,水质质量指数是限制水域生态健康的主要因子,水源涵养功能、重要生境保持率、建设用地比率以及森林覆盖率等为限制陆域生态健康的主要因子。研究成果可为制定海城河流域生态补偿体制提供一定决策和参考依据。

An evaluation system with 17 representative indexes is constructed from the water and land areas. Haicheng River is divided into 12 evaluation units to comprehensively evaluate its ecosystem health and analyze the main problems existing in the ecological environment. The research shows that there are some differences in the spatial distribution of the ecosystem health evaluation grades of Haicheng River, among which the lower reaches with relatively dense population have relatively lower grades while the upper reaches have higher grades. River basin ecosystem health generally belongs to the general level. Water quality index is the main factor limiting water ecological health. Water conservation function, important habitat retention rate, construction land ratio and forest coverage rate are the main factors limiting land ecological health. The research results can provide certain decision-making and reference basis for making ecological compensation system in Haicheng River Basin.