Evolution and effects analysis of surface and groundwater cycle in inland lakes under artificial recharge conditions
Wan Weifeng
Sun Liqun
Du Yajun
Wang Junzhi
Yu Xiangqian
Liao Zilong
Abstract：As climate change and human activity intensify,many inland lakes in China are experiencing varying degrees of shrinkage and deterioration in water quality. Artificial water replenishment is an effective approach to mitigate ecological and environmental problems in these lakes;however,it also significantly affects the lake and surrounding groundwater systems. Focusing on the Daihai Lake in Inner Mongolia,this study analyzes the causes of lake shrinkage and examines the evolution of surface water-groundwater cycling under both natural and artificial replenishment conditions. It also explores the interactive responses between lake water and groundwater following replenishment. Based on different replenishment scenarios,future trends toward a new consumption and replenishment balance are projected. The findings indicate that artificial extraction is the primary cause of the lake's water volume reduction. Ecological emergency replenishment and measures to restrict groundwater extraction have played a positive role in curbing the shrinkage of the Daihai Lake. During the replenishment period from September 2022 to March 2023,the lake surface area reduced by an average of 0.79 km2 year-over-year,marking a significant slowdown in the rate of shrinkage. Groundwater monitoring data reveal that the previously existing groundwater depletion areas around the lake have largely recovered,and groundwater levels are rising. However,due to the lower-than-designed replenishment volumes and the delayed response effect,the effectiveness of replenishment remains limited. Furthermore,iterative calculations of the new consumption and replenishment balance predict that with annual artificial replenishment volumes of 20 million m3 and 44.66 million m3,the lake surface area will reach 58.7 km2 and 71.9 km2,respectively,after 10 years. This study provides a basis for understanding surface water-groundwater transformation under changing conditions in inland basins and offers guidance for water resource protection and management in the Daihai Lake area.
Keywords：inland lakeecological water replenishmentthe Daihai Lakeinteractionconsumption and replenishment balance
Publication Date：2024-11-12
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 69-76 )