Quantitative Analysis of the Maximum Water Level Prediction in Beijing Mi-Huai-Shun Water Source Area

By analyzing the variation and influencing factors of groundwater level, the dynamic characteristics of groundwater level in a single aquifer structure area in Miyun, Huairou and Shunyi in Beijing are divided into four stages: groundwater balance period (1960s—late 1970s), groundwater overexploitation period (1980s—2003), Huairou emergency water source impact period (2003—2015) and ecological water replenishment impact period (2015 to now). The exploitation of regional groundwater and ecological water replenishment are the main factors causing the change of regional water level. The change of groundwater level has the typical characteristics of artificial influence. In the future, with the water sources such as No. 8 water plant entering the production limit period, Huairou emergency water source entering the hot standby conservation period and the normalization of ecological water replenishment, the groundwater level will continue to rise rapidly because the aquifer structure in this area is mainly gravel and has great permeability. Based on the water level observation data of different time series in the study area, the maximum water level of Miyun, Huairou and Shunyi water source is predicted by quantitative analysis method. The research results can provide guidance and reference for the reasonable determination of anti-floating water level and groundwater control of deep foundation pit engineering in this area.