九寨沟生态环境质量评价和植被敏感性因子分析研究

Evaluation about environment quality and analysis of vegetation sensitive factor of Jiuzhaigou scenic spot

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。本文选取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地质环境质量总体较好,优、良级别区域占71.09%以上。进行了生态环境质量敏感性因子NDVI分析,认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。

Jiuzhaigou beauty spot is world-class travel scence. There is very important meaning that we evaluate correctly entironment quality and analyses its sensitive factor. Firstly, the article selects five factors which reflect entironment quality, such as vegetation, humidity, soil, heat and slope. The authors distill index of five factors from RS images and pile them up to analyze and evaluate entironment quality. As a whole, entironment quality of Jiuzhaigou is good, and excellent area is covered up to 71.09% of total area. Then, the authors analyse sensitive factor of environment quality-vegetation index. The results show vegetation Jiuzhaigou has been highly covered. Change of vegetation cover fluctuant and steady since tourism developed.