Research on the Impact of Reservoir Regulation on Groundwater Level Changes in Guangxi

To investigate the impact of reservoir regulation on groundwater level changes in Guangxi, based on hydrological cycle theory and regional hydrogeological characteristics, this study systematically analyzes the mechanisms by which reservoir regulation affects groundwater levels, as well as the unique impacts of Guangxi's karst landforms and subtropical monsoon climate. The study reveals that reservoir regulation affects groundwater levels through three core pathways: direct recharge from reservoir water seepage, indirect drive from river flow regulation, and regional hydrological cycle reconfiguration. The development of karst caves and fissures in Guangxi's karst region exacerbates the spatial heterogeneity of seepage, and the monsoon climate causes the impact of reservoir regulation on groundwater levels to exhibit a "rainy season overlap, dry season dominance" pattern. Human water demand further complicates the dynamic relationship between the two. Based on this, theoretical strategies are proposed, including differentiated regulation schemes, multi-source combined regulation, and ecological water level threshold control, to provide theoretical support for the coordinated management of reservoir regulation and groundwater resources in Guangxi.