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Journal of Applied Remote Sensing

Monitoring changes in the water volume of Hulun Lake by integrating satellite altimetry data and Landsat images between 1992 and 2010
Author(s): Jiajia Zheng; Chang-Qing Ke; Zhude Shao; Fei Li
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Paper Abstract

Lake level and volume are sensitive to climate change, and their changes can affect the sustainable utilization of regional water resources. Satellite radar/laser altimetry has effectively been used for monitoring water-level changes in recent years. In this study, satellite altimetry data and optical images were used to assess the changes in water level, area, and volume of Hulun Lake in north-eastern China. We derived a time series of lake levels for nearly two decades (1992 to 2010) from the altimetry data of two satellite sensors (Topex/Poseidon and Envisat RA-2); additionally, lake surface extent was extracted from Landsat TM/ETM+ images during the same period. The results indicate that the water level, area, and volume of Hulun Lake decreased over the past two decades. The water level shows a significant decrease (−0.36  m/year) of a total of −5.21  m from 1992 to 2010, specifically including a slight decrease (−0.4  m) during 1992 to 1999 and a sudden drop (−4.81  m) during 2000 to 2010. There has also been a consistent and significant reduction in lake area (−355.35  km2) and volume (−12.92  km3). An integrated examination on changes in temperature, evaporation, precipitation, and runoff during 1992 to 2010 shows that the main changes in the Hulun Lake area are correlated with increasing temperature (0.47°C/year) and evaporation (13.61  mm/year), as well as decreasing precipitation (−6.58  mm/year) and runoff (−1.04×108  m3/year). Thus, we infer that climate warming is likely the main cause of the changes in water level, area, and volume of Hulun Lake. In addition, anthropogenic factors accelerate the degradation of the Hulun Lake wetland to some extent.

Paper Details

Date Published: 29 March 2016
PDF: 14 pages
J. Appl. Remote Sens. 10(1) 016029 doi: 10.1117/1.JRS.10.016029
Published in: Journal of Applied Remote Sensing Volume 10, Issue 1
Show Author Affiliations
Jiajia Zheng, Nanjing Univ. (China)
Collaborative Innovation Ctr. of Novel Software Technology and Industrialization (China)
Jiangsu Ctr. for Collaborative Innovation in Geographical Information Resource Development and App (China)
Chang-Qing Ke, Nanjing Univ. (China)
Jiangsu Ctr. for Collaborative Innovation in Geographical Information Resource Development and App (China)
Collaborative Innovation Ctr. of Novel Software Technology and Industrialization (China)
Zhude Shao, Nanjing University (China)
Collaborative Innovation Ctr. of Novel Software Technology and Industrialization (China)
Jiangsu Ctr. for Collaborative Innovation in Geographical Information Resource Development and App (China)
Fei Li, Nanjing Institute of Geography and Limnology (China)


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