基于生态敏感性的许昌市土地利用评价

Ecological sensitivity evaluation of land use change in Xuchang based on ecological sensitivity analysis

依据许昌市2005-2010年土地利用数据,选取高程、坡度、坡向、河流水域4个因子,建立生态敏感性评价体系.运用GIS技术和层次分析法(AHP),获得各评价因子的权重和5个敏感等级,通过加权求和对许昌市土地利用进行生态评价.许昌市66%的土地为不敏感和轻度敏感区,集中在东部平原地区;34%的土地敏感性等级较高,主要分布在禹州市西部和襄城县西南的山地.

On the basis of the land use data from 2005 to 2010, selecting elevation, gradient, slope direction, water area four factors, the ecological sensitivity evaluation system is established.By using GIS technology and analytic hierarchy process （ AHP） , obtain the weight of each evaluation factor and five sensitive levels.By using a weighted summation method, evaluate the situation of land utilization, 66%of the land in Xuchang non sensitive areas and light sensitive area concentrated in the eastern plain area;34% of the land sensitivity level is higher, mainly distributed in western Yuzhou city and southwest mountain of Xiangcheng county.