车尔臣河中下游生态环境敏感性评价研究

Study on Evaluation of Eco-environmental Sensitivity in the Middle and Lower Reaches of Che'erchen River

以流域生态环境敏感性为研究对象,以流域生态环境的空间结构与功能分析为核心,针对典型干旱区流域的特点,科学提取车尔臣河中下游流域地理空间信息,建立流域生态环境敏感性评价体系与单因子、多因子综合评价模型;利用1980、1995、2000年三期遥感影像及1km×1km格网水土资源空间数据,运用遥感、地理信息系统和数学相结合的方法对流域生态环境敏感性进行综合评价,将流域生态环境敏感性分区在空间上表现出来,并依据研究结果将车尔臣河中下游流域划分为车尔臣河三角洲水土保持与防护区、中游平原风沙控制区、下游平原生物多样性保护区、流域沙漠自然生态区、南部山前平原戈壁荒漠自然生态区5大功能区,针对不同功能区的特点和功能提出科学合理的开发保护对策.

The research object of this paper is ecological environment sensitivity of Che＇erchen river basin and the core is to study the spatial structure and function of ecological environment in the basin. Based on the characteristics of the typical arid and semi-arid basin, we extracted the middle and lower reaches from the big river basin reasonably, established eco-environmental sensitivity evaluation system and the single-factor and multi-factor comprehensive evaluation models, we combined methods of remote sensing, geographical information systems and mathematics to evaluate the ecological environment sensitivity in this basin comprehensively using remote sensing images of 1980,1995,2000 and spatial data of l kmX 1 km grid water and land resources and spatial superposition analysis module of geographic information systems software which make the ecological environment sensitive area demonstrated in space. Based on the research findings we divide this region into five major ecological function areas, such as soil and water conservation and protection area in Che＇erchen River delta, sandy wind control area in the plain in the middle reaches, biodiversity conservation area in downstream plains, the region of desert, the Gobi area of the southern piedmont, based on different features and functions of the areas we put forward the development and protection measures scientifically and rationally.