基于GEE云计算的祁连山国家自然保护区生态环境质量评价

Evaluation of Ecological Environment Quality in Qilian Mountain National Nature Reserve Based on GEE Cloud Computing

为客观评价祁连山国家自然保护区生态环境质量,本研究选取Google Earth Engine(GEE)云计算平台2000年、2005年、2010年、2015年和2020年5期MODIS数据集,通过构建遥感生态指数(RSEI)对其进行动态监测。结果表明:在时间上,保护区内生态环境呈现先恶化后改善的趋势。2000-2010年期间,RSEI均值从0.56下降到0.43,生态环境质量呈现恶化趋势;2010-2020年期间,RSEI均值从0.43上升到0.47,生态环境质量呈现改善趋势。在空间上,从西北到东南保护区内生态环境质量逐渐提高,生态环境差和较差区域的数量呈现先增加后减少的趋势,生态环境中等的区域整体上呈现持续增加的趋势。上述结果反映出祁连山整治行动起到了明显的成效,建议根据祁连山环境质量等级进一步采取不同的保护和治理措施。

In order to objectively evaluate the ecological environment quality of Qilian Mountain National Nature Reserve,Google Earth Engine M0DIS datasets from the year of 2000,2005,2010,2015 and 2020 were selected,it is dynamically monitored by constructing the remote sensing ecological index(RSEI).The results show that:Firstly of all,in terms of time,the ecological environment in the protected area has obviously deteriorated and then slightly improved later.Precisely,from 2000 to 2010,the average RSEI decreased from 0.56 to 0.43,which related to the ecological environment quality showed a deteriorating trend;Besides,from 2010 to 2020,the average RSEI climbed to 0.47 from 0.43,and the ecological environment quality showed a overall trend of improvement.Secondly,in terms of space,the ecological environment quality in the protection areas from northwest to southeast was gradually promoted,the number of and the poor ecological environment areas and the much poorer ecological environment areas showed a trend of increasing at the first place,and then decreasing eventually;However,the number of medium ecological environment areas showed a continuous increase trend.In conclusion,the above results reflect that the regulation movement of the Qilian Mountains has got obvious achievements,but it is suggested that different protection and treatment measures should be taken appropriately according to the environmental quality level of the Qilian Mountains.