Estimating Dynamics of Terminal Lakes in the Second Largest Endorheic River Basin of Northwestern China from 2000 to 2017 with Landsat Imagery
Estimating Dynamics of Terminal Lakes in the Second Largest Endorheic River Basin of Northwestern China from 2000 to 2017 with Landsat Imagery
复制标题
利用Landsat影像估算西北第二大内流河流域末端湖泊动态2000-2017年
DOI：
10.3390/rs11101164
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发表时间：
2019
期刊：
影响因子：
5
通讯作者：
Yu Jing Jie
中科院分区：
文献类型：
--
作者：
Li Bei;Zhang Yi Chi;Wang Ping;Du Chao Yang;Yu Jing Jie
定量分析末湖动态变化对了解干旱区内陆河流域水-生态-经济关系具有重要意义。本研究首次对黑河下游生态调水工程实施以来末端湖泊的时空变化进行了研究。湖泊面积和相应的用水量确定了248个陆地卫星图像。项目实施两年后，湖泊恢复了生机，2002-2017年，湖泊总面积增加了382.6%，从30.7平方公里增加到148.2平方公里。东居延湖（EJL）首先作为项目目标恢复，随后达到70.1平方公里的最大面积。2003年开始实施水分散，并优先恢复东河。2017年，东江天鹅湖面积扩大到67.7平方公里，其他四湖暂时存在或维持在7平方公里以下，如西居延湖。湖泊耗水量与湖泊面积同步增长。六湖平均耗水量为1.03 × 108 m3/a，其中63%来自长江口。不断增加的终端湖泊;然而，这突出表明，在水资源有限的地区，河岸植被和湖泊生态系统之间存在着季节性的用水竞争。
Quantifying terminal-lake dynamics is crucial for understanding water-ecosystem-economy relationship across endorheic river basins in arid environments. In this study, the spatio-temporal variations in terminal lakes of the lower Heihe River Basin were investigated for the first time since the Ecological Water Diversion Project commenced in 2000. The lake area and corresponding water consumption were determined with 248 Landsat images. Vital recovery of lakes occurred two years after the implementation of the project, and the total lake area increased by 382.6%, from 30.7 to 148.2 km2, during 2002–2017. East Juyan Lake (EJL) was first restored as a project target and subsequently reached a maximum area of 70.1 km2. Water dispersion was initiated in 2003, with the East river prioritized for restoration. Swan Lake in the East river enlarged to 67.7 km2 by 2017, while the other four lakes temporarily existed or maintained an area < 7 km2, such as West Juyan Lake. Water consumed by lakes increased synchronously with lake area. The average water consumption of the six lakes was 1.03 × 108 m3/year, with 63% from EJL. The increasing terminal lakes; however, highlight the seasonal competition for water use between riparian vegetation and lake ecosystems in water-limited areas.