This art presents ten years of urban subsidence derived from continuous GPS stations operated by the Crustal Movement Observational Network of China within and adjacent to the municipality of Tianjin. The subsidence time series presented in this study provide reliable “ground truth” and constraints for calibrating or validating subsidence estimations from numerical modeling and repeated surveys using other remote sensing techniques.

This study presents an integrated approach to evaluate inundation risks, in which an algorithm is proposed to integrate the storm water management model (SWMM) into a geographical information system (GIS). The proposed algorithm simulates the flood inundation of overland flows and in metro stations for each designed scenario. It involves the following stages: (i) determination of the grid location and spreading coefficient and (ii) an iterative calculation of the spreading process.

These exists a new phenomenon with continuous deformation in the sandy aquifers in Shanghai. Sharp hydraulic gradient would be formed in the aquifer and shear stresses would develop. Cumulated shear stress is one of the main factors that contribute to deformation within an aquifer. Cosserat continuum mechanics can be applied to analyse the mechanism of confined aquifer deformation controlled by accumulated shear stress.