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在干旱地区,终端湖面积变化受气候影响较大,同时湖泊面积变化对生态环境平衡和土地利用变化起着重要作用。基于Landsat和JRC Global Surface Water(JRC GSW)多源遥感数据、气象数据、土地利用数据和NDVI数据,分析了艾比湖水面面积变化及驱动因素,以及对艾比湖流域环境的影响。得出如下结论:2000—2020年艾比湖面积呈现先减少后增加的趋势,2010年左右为转折点;面积变化与降水量的相关性最大(R
2
=0.589
P
<
0.01和R
2
=0.519
P
<
0.05);流域内耕地面积增长最大,为3 140 km
2
,占研究区总面积的6.23%;其次是草地面积增加1 402 km
2
,占研究区总面积的2.78%;而面积减少最多的是未利用土地,为2 974 km
2
,占总面积的5.90%,主要转化为草地和耕地;由NDVI变化可知,该流域内的植被主要由草地构成,并且草地高覆盖(>0.8)区呈现出增加趋势,集中在人类活动区。干旱区终端湖泊面积变化监测是生态环境保护研究的有益补充,为进一步保护以及恢复干旱区生态环境的方法提供理论基础。
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