Variations in water level, area and volume of Hongze Lake, China from 2003 to 2018,Journal of Great Lakes Research

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Variations in water level, area and volume of Hongze Lake, China from 2003 to 2018
Journal of Great Lakes Research ( IF 2.2 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.jglr.2020.08.024
Yu Cai , Chang-Qing Ke , Xiaoyi Shen

Abstract Lake changes have great impacts on local and regional ecosystems and socioeconomic activities. To determine the recent changes in Hongze Lake, radar altimeter and Landsat data were used to examine the water level and area and estimate the water volume changes from 2003 to 2018. Generally, the annual water level results from radar altimeter data showed good agreement with in situ measurements (r2 = 0.62, bias = −0.02 m, mean absolute error = 0.10 m and root mean square error = 0.12 m). Although the results show that the water level and water volume of Hongze Lake had no trends during the 16 years, the water area decreased significantly at a rate of 19.76 km2 per year. Despite great fluctuations throughout 16 years, two shifts occurred in approximately 2007 and 2013. The water level, area and volume of Hongze Lake decreased from 2007 to 2012, but they all showed increasing trends after 2013. The interannual changes in the water level and volume of Hongze Lake were consistent with the changes in annual precipitation, while the change in area was mainly affected by human activities, especially land reclamation and aquaculture activities along the lakeshore. In addition, the intra-annual change in the water level was greatly affected by artificial activities such as irrigation and flood prevention.

更新日期：2020-12-01

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