Remote Sensing Study of Dongting Lake Beach Changes before and after Operation of Three Gorges Reservoir

被引：0
|
作者：
Yu S. [1 ,3 ]
Yu D. [4 ]
Wang L. [2 ]
Li C. [2 ]
He Q. [1 ,4 ]
Xiang F. [2 ]
机构：
[1] School of Earth Sciences, China University of Geosciences, Wuhan
[2] School of Geography and Information Engineering, China University of Geosciences, Wuhan
[3] Hunan Planning Institute of Land and Resources, Changsha
[4] Remote Sensing Center of Hunan Province, Changsha
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2019年 / 44卷 / 12期
关键词：
Beach area; Dongting Lake; Impact of Three Gorges reservoir; Remote sensing; Sediment inflow and outflow;
D O I：
10.3799/dqkx.2019.182
中图分类号：
学科分类号：
摘要：
Based on the multi-platform satellite remote sensing data of 128 time-phases, the variation characteristics and causes of the beach in Dongting Lake before and after the operation of the Three Gorges Reservoir (TGR) during 1994-2016 were analyzed in this study. The results show that after the operation of the TGR, the variation range of Dongting Lake water level and beach is smaller than that before the operation, and presents linear relationship. The linear trend of Dongting Lake beach is different in different time periods, showing the characteristics of first expansion and then contraction. Compared with before TGR operation, Dongting Lake beach under the same water level is larger after TGR operation. The higher the water level, the greater the increase. Before the operation of the TGR, Dongting Lake was continuously silted up. After the operation, the sediment deposition has decreased to a negative, and the elevation of beach decreases at a rate of 1.59 mm/a. The operation of TGR and lake sand mining are important influence factors for the change of Dongting Lake beach. © 2019, Editorial Department of Earth Science. All right reserved.
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页码：4275 / 4283
页数：8
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