Application of Numerical Simulation in Land Subsidence Analysis in Xiqing District of Tianjing
Land subsidence,the main geological disaster in Tianjin,is mainly caused by water resource shortage and over-exploitation. By using Processing Modflow,the paper makes a numerical simulation of groundwater flow to explore the relationship between land subsidence and groundwater. To build the numerical simulation model,the study build a concept model and math model of the hydrogeological conditions,according to which hydrogeological parameters which may reflet the reality are identified. The comparison between data from numerical simulation model and on-site data indicates that the model is accurate,and the groundwater flow curve is in accordance with land subsidence curve. Tests in this paper indicate that when the parameters used in numerical simulation model establishment can reflect real hydrogeological conditions,the numerical simulation method could be used to present the process of land subsidence though the simulate data has few errors with field measurements.