沁河流域水环境约束分区与景观格局优化

以沁河流域(山西省晋城市段)为例,将流域划分为2个一级评价单元和14个二级评价单元,从自然环境因素和社会经济因素选择相应指标进行评价;在此基础上,基于GIS技术和生态因子叠置法,从水环境敏感性和水环境压力2个方面综合考虑了流域水环境现状,根据水环境敏感性和水环境压力的等级划分,将流域水环境划分为低压低敏感区域、低压高敏感区域、高压低敏感区域和高压高敏感区域4类区域,针对各类区域的现状提出了相应的景观格局调整方案并提出了全流域的景观格局布置思路.山地生态系统和平原生态系统有机结合的生态网络格局,将有力改善沁河流域的水环境现状. 

Water Environmental Constraint Regionalization and Landscape Pattern Optimization for the Qinhe River Basin

In order to study the water environmental constraint regionalization and landscape pattern optimization in the Qinhe River Basin of Shanxi Province,the basin was divided into two primary and 14 secondary units for assessment,and indices from natural environmental and socio-economic factors were selected for evaluation.By overlaying GIS and ecological factors,the sensitivity and pressure of the water environment were integrated to analyze the present water environment situation.According to the classification of the sensitivity and pressure of the water environment,the river basin was divided into four main types: low-pressure and low-sensitivity area,low-pressure and high-sensitivity area,high-pressure and low-sensitivity area,and high-pressure and high-sensitivity area.Landscape pattern adjustment programs were suggested with regard to the current situation in each area.Finally,a landscape pattern arrangement plan for the whole river basin was developed.A pattern of ecological networks for the combination of the mountain and plain ecosystem would greatly improve the current situation of water environment in the Qinhe River Basin.