Detecting Water Diversion Fingerprints in the Danjiangkou Reservoir from Satellite Gravimetry and Altimetry Data
Detecting Water Diversion Fingerprints in the Danjiangkou Reservoir from Satellite Gravimetry and Altimetry Data
复制标题
利用卫星重力和测高数据探测丹江口水库引水指纹
DOI：
10.3390/s19163510
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发表时间：
2019-08-20
期刊：
影响因子：
3.9
通讯作者：
Li, Fupeng
中科院分区：
文献类型：
--
作者：
Chao, Nengfang;Chen, Gang;Li, Fupeng
丹江口水库是南水北调中线工程的淡水水源地，其水位和库容变化对水资源管理具有重要意义。为了最大限度地发挥重力恢复与气候实验（GRACE）使命的潜在能力，首次提出了一种改进的拉格朗日乘子法（ILMM）用于小尺度流域（DJKR）陆地水储量异常（TWSA）的探测。此外，首次提出了引水指纹分析的时空格局的TWSA在DJKR。结果表明，利用ILMM可以有效地探测到2014年大金河水库蓄水引起的水位和蓄水量增加信号，并与测高和现场实测数据吻合较好。此外，由于DJKR蓄水的引水指纹推断，并描述了蓄水的时空变化的进展。结果表明，2013-2015年，汉江上游蓄水量减少，东江流域及其以东地区蓄水量增加。研究结果为东江流域水资源监测和南水北调工程管理提供了科学的决策依据。
The Danjiangkou Reservoir (DJKR) is the freshwater source for the Middle Route of the South-to-North Water Diversion Project in China, and its water level and storage changes are important for water resource management. To maximize the potential capacity of the Gravity Recovery and Climate Experiment (GRACE) mission, an improved Lagrange multiplier method (ILMM) is first proposed to detect terrestrial water storage anomalies (TWSA) in the small-scale basin (DJKR). Moreover, for the first time, water diversion fingerprints are proposed to analyze the spatiotemporal pattern of the TWSA in the DJKR. The results indicate that the increased water level and storage signals due to the DJKR impoundment in 2014 can be effectively detected by using the ILMM, and they agree well with the results from altimetry and in situ data. Additionally, the water diversion fingerprints due to the DJKR impoundment are inferred, and describe the progression of spatiotemporal variability in water storage. The results show that water storage decreased in the upper Hanjiang River and increased in the DJKR as well as to the east of it during the period 2013-2015. Our research provides a scientific decision-making basis for monitoring the water resources of the DJKR and managing the South-to-North Water Diversion Project.