Abstract:Shallow geological structures near Judian lake have been set up. Through groundwater dynamic monitoring, water level measurement and other means, groundwater flow field has been introduced, and hydrogeological characteristics and three types water transformation laws of the lake area have been analyzed. It is showed that geological structures near the lake area are mainly composed of multiple layers of silty clay and clayey silt interbedded with silt, and the marine sedimentary characteristics are obvious in the northern part of the lake area. The shallow pore water near Judian lake is mainly supplied by atmospheric precipitation, irrigation backflow, and surface water lateral seepage. The main discharge methods are groundwater evaporation and artificial mining. There is a close hydraulic connection between lake water and pore water shallower than 20m. The phenomenon of saltwater intrusion is obvious in the research area, with ClNa type groundwater in the north and HCO3·ClNa·Ca·Mg type groundwater in the south. The TDS content gradually decreases from north to south. This study willIt provide geological support for ecological protection and restoration plan of Judian lake, improve the water storage capacity of the lake area, and maintain biodiversity and improve regional ecological environment.
