宁夏沿黄经济区地质环境承载力分析及预测

Analysis and Prediction of Geo-Environmental Carrying Capacity in Economic Zone along the Yellow River

宁夏地区地处西北干旱区,是我国西部重要生态屏障,生态环境脆弱。沿黄经济区主要包括银川、卫宁两大平原区,是宁夏各种生产要素和经济活动最为集中的地区。文章基于GIS技术,构建由地质环境子系统、生态环境子系统和社会环境子系统组成的评价指标体系,建立复合系统评价模型,对宁夏沿黄经济区的地质环境承载力进行了分区评价,将宁夏沿黄经济区分为适宜建设区、适度控制建设区、中度控制建设区三个等级。同时,对研究区的土壤次生盐渍化、土地沙漠化、地面塌陷、区域地下水位下降及地下水污染等环境地质问题进行了定性分析及预测。

Located in arid area, Ningxia Autonomous Region is the important ecological barrier in northwest China and its eco-environment is fragile. The Economic Zone along the Yellow River mainly consists of Yinchuan plain and Weining plain. It is the area with concentrated varies production factors and economic activities. Consisting of geo- environmental subsystem, eco-environmental subsystem and social environmental subsystem, the evaluation index system was set up based on GIS. The evaluation model of complex system was used to assess the geo-environmental carrying capacity and the Economic Zone was classified as suitable construction area, slight control construction area and moderate control construction area. Finally, the environmental geological problem such as soil salinization, land desertification, ground subsidence, depletion of regional groundwater level and groundwater pollution were analyzed and predicted qualitatively.