吉林西部生态系统退化评价

吉林西部是一个典型的自然、经济和社会的复合系统,生态环境脆弱,土地沙化、碱化严重.在分析该区环境的基础上,提出了生态系统退化度的概念.以长岭县为例建立了生态系统退化度评价指标体系,包括土地背景质量、生态环境现状、经济发展水平、生态破坏速度诸要素15项指标.运用RS、GIS和数据库管理技术建立了生态系统退化度研究数据库.采用层次分析法,开展了以乡为单元的生态系统退化度评价,用MapInfo软件绘制了生态系统退化度数字化图,为研究区的生态建设提供了科学依据.

Study on Ecosystem Degraded Estimation with Prevention and Cure in the Western of Jilin Province

The western of Jilin Province is a typical compound system of nature, economy and society, with vulnerable eco-environment. The desertification and basification of the soil is serious there. Based on the environment analysis, it was put forward that the concept of the eco-environment degraded degree (EDD). The estimation flow was built taking Changling County as an example, and the index system as well, which was composed of thirteen indexes such as soil quality, eco-environment states, economy developing level, ecology destroying speed and so on. Database on EDD study was built using RS, GIS and database management technology. Adopting analytic hierarchy process (AHP), EDD estimation was developed taking village as a unit, and numerical figures were protracted by MapInfo. The study afforded scientific foundation on ecology construction of the area.