基于TM数据的阿克苏市生态环境质量指数RSEI分级研究

Study on the Classification of Ecological Environmental Quality Index RSEI in Aksu City Based on TM Data

借助遥感技术手段构建了阿克苏市生态环境质量指数RSEI,并对其生态环境质量特征进行评价。结果表明,阿克苏市干度和热度值较高而绿度和湿度值较低的区域占主导地位,主要分布在北部、南部大面积荒漠和沙漠地带,反之,干度和热度值较低而绿度和湿度值较高的区域所占比例较小,主要分布在绿洲和少量荒漠、沙漠植被分布区;2016年阿克苏市遥感生态环境质量指数RSEI处于2级(0.2～0.4,"较差")的区域所占比例最高,为50.43%,其次是3级(0.4～0.6,"一般"),为41.29%。因此,阿克苏区域生态环境质量形势依然比较严峻,还需加大区域生态环境建设和保护工作的力度。

Ecological environmental quality index （RSEI） of Aksu city was constructed by means of remote sensing technology-, and its ecological environment quality characteristics was evaluated. The resuhs showed that the area of higher dryness and heat value was dominant, which was distributed in the Gobi, desert regions of Aksu north and southarea, while there was few higher green and humid value areas distributed in oasis, and desert vegetation region. In 2016, the ratio of RSEI level 2 （0.2~0.4） area in Aksu city was 50.43%, and then was RSEI level 3 （0.4~0.6） area（41.29%）. Therefore, regional ecological environment quality of Aksu city was still in severe situation and ecological environment protection should be accelerated.