九寨沟生态环境质量评价和植被敏感性因子分析

九寨沟风景名胜区是世界级旅游精品,对九寨沟风景名胜区的生态环境质量进行正确认识和评价,对景区的保护意义重大。首先,本文选取了直接反映生态环境质量的五个因子植被、湿度、土壤、热度、坡度,通过遥感图像提取各因子的指数值分析研究生态环境质量,结论为高海拔的九寨沟生态环境质量总体较好,优、良级别区域占71.09%以上。然后本文进行了生态环境质量敏感性因子NDVI分析,得出的结论为:九寨沟内植被覆盖度较高,自旅游开发后植被覆盖率明显提高,多年植被覆盖变化属于波动变化,处于平稳变化。

Evaluation of eco- environmental quality and analysis of vegetation sensitive factor in Jiuzhaigou scenic spot

Jiuzhaigou beauty spot is world-class travel scene. It has a very important meaning to correctly evaluate its environment quality and analyze its sensitive factor. Firstly, the article selects five factors reflecting environment quality such as vegetation, humidity, soil, heat and slope. Then it analyzes and evaluates environment quality by extracting index of five factors from RS images. The conclusion is that environment quality of Jiuzhaigou is well. The excellent and good area is 71.09% of total area. Finally, it analyses sensitive factor of environment quality-vegetation index. It concludes that vegetation bestrow of Jiuzhaigou is high. The change of vegetation bestrow is fluctuant and balanced.