基于GIS的清城区林地生态敏感性评价研究

本文结合广东省清远市清城区林地利用保护规划，利用数字化的地形数据和森林资源调查资料，在 GIS技术的支持下，选取并分析高程、坡度、坡向、植被覆盖类型、植被覆盖度、水域6个生态敏感性评价因子，采用模糊数学方法确定各评价因子的生态敏感性程度，对清城区林地生态敏感性进行评价。研究结果表明：研究区内各生态敏感性区面积比分别为高度敏感区（18.5％）、中度敏感区（11.1％）、低度敏感区（70.4％），前两者占总面积的29.6％，低度敏感区占到70.4％且分布集中连片，表明研究区抗干扰能力强，不易出现植被退化、大规模森林景观破坏、水土流失等生态环境问题。

GIS-based Study on Ecological Sensitivity Evaluation of Forest Land in Qingcheng District

Abstracts:We Combined with forest utilization and protection planning in Qingyuan City, Guangdong Province and in the support of GIS technology and determinating the ecological sensitivity degree of each evaluating factor by the fuzzy mathematics method and selecting and analyzing of the six ecological sensitivity evaluation factors, including vegetation coverage, aspect, slope, elevation, water buffer, and vegetation cover type, based on the digital terrain data and the forest resources survey data,We evaluated the ecological sensitivity of Qingcheng district. The results showed that the highly sensitive areas accounted for 18.5% of the total area and the moderate sensitive area accounted for 11.1% and the low sensitive area accounted for 70.4%. That is to say, the first two sensitive regions accounted for 29.6% of the total area and the low sensitive areas, which distributed continuously, accounted for 70.4%. It indicated that the studied area had the strong anti-interference capacity and it was difficult for the vegetation degradation, massive destruction of forest landscapes, soil erosion and other environmental problems to occur in this area.