A Coupled One-Dimensional Numerical Simulation of the Land Subsidence Process in a Multilayer Aquifer System due to Hydraulic Head Variation in the Pumped Layer

Figure 2

Simulated land surface vertical displacement corresponds to changes in hydraulic head of the confined aquifer II. In Stage I, the hydraulic head in the pumped layer drops and the land surface subsides. In Stage II, the hydraulic head in the pumped layer recovers rapidly and the land subsidence ceases gradually and reaches a stable state. In Stage III, the hydraulic head in the pumped layer recovers slowly and the land surface rebounds.