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Article

Area Changes and Influencing Factors of Large Inland Lakes in Recent 20 Years: A Case Study of Sichuan Province, China

1
School of Earth Science, Chengdu University of Technology, Chengdu 610059, China
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Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hongkong 999077, China
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State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
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Land Satellite Remote Sensing Application Center, Ministry of Natural Resources of China, Beijing 100048, China
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Northwest Engineering Corporation Limited, Xi’an 710065, China
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PIESAT Information Technology Co., Ltd., Beijing 100195, China
*
Author to whom correspondence should be addressed.
Academic Editor: Genyun Sun
Water 2022, 14(18), 2816; https://doi.org/10.3390/w14182816
Received: 27 July 2022 / Revised: 1 September 2022 / Accepted: 6 September 2022 / Published: 9 September 2022
(This article belongs to the Special Issue Remote Sensing in Monitoring and Assessment of Marine Environment)
Lakes are important natural resources closely related to human survival and development. Based on PIE cloud computing platform, the study uses Landsat images and the empirical normalized water body index (ENDWI) to extract water body information of the large lakes in Sichuan province from 2000 to 2020 in the drought and rainy seasons, respectively, and uses the Mann–Kendall test to obtain the long-term trends of their area and climate. On this basis, the evolution of the lakes and their correlation with climate and human activities are analyzed. The results show that (1) In the past 20 years, the area of Lugu Lake, Qionghai Lake, and Luban Reservoir represent a decreasing trend, with Lugu Lake being the most affected. The area of Ma Lake, Three Forks Lake, and Shengzhong Reservoir increased, with the area of Shengzhong Reservoir increasing significantly; (2) During the drought season, all six lakes showed a decreasing trend in precipitation, with the most apparent decreasing trend for Lugu Lake (Slope = −0.8). Only Lugu Lake showed a decreasing trend in precipitation (Slope = −0.15) during the rainy season. The precipitation of Ma Lake, Three Forks Lake, Luban Reservoir and Shengzhong Reservoir showed a significant increasing trend (Slope value was greater than 1.96); (3) The temperatures of the remaining lakes all decreased in the drought season and increased in the rainy season, except that the temperature of Shengzhong Reservoir decreases throughout the year; (4) The area change of plain lakes is greatly affected by human activities, but the area of plateau lakes is are more impacted by climate. Our study improved the accuracy of long-term water body change monitoring with PIE-Engine Studio. Besides, the findings would provide reference for the implementation of sustainable water resources management in Sichuan Province. View Full-Text
Keywords: water extraction; cloud computing platform; area change; PIE-Engine Studio water extraction; cloud computing platform; area change; PIE-Engine Studio
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MDPI and ACS Style

Liu, W.; Dai, X.; Wang, M.; Lan, Y.; Qu, G.; Shan, Y.; Ren, J.; Li, W.; Liang, S.; Wang, Y.; Liu, D. Area Changes and Influencing Factors of Large Inland Lakes in Recent 20 Years: A Case Study of Sichuan Province, China. Water 2022, 14, 2816. https://doi.org/10.3390/w14182816

AMA Style

Liu W, Dai X, Wang M, Lan Y, Qu G, Shan Y, Ren J, Li W, Liang S, Wang Y, Liu D. Area Changes and Influencing Factors of Large Inland Lakes in Recent 20 Years: A Case Study of Sichuan Province, China. Water. 2022; 14(18):2816. https://doi.org/10.3390/w14182816

Chicago/Turabian Style

Liu, Wenxin, Xiaoai Dai, Meilian Wang, Yan Lan, Ge Qu, Yunfeng Shan, Jiashun Ren, Weile Li, Shuneng Liang, Youlin Wang, and Dongsheng Liu. 2022. "Area Changes and Influencing Factors of Large Inland Lakes in Recent 20 Years: A Case Study of Sichuan Province, China" Water 14, no. 18: 2816. https://doi.org/10.3390/w14182816

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