The state of land subsidence and prediction approaches due to groundwater withdrawal in China

摘要: This article gives a general introduction to land subsidence with the prediction approaches due withdrawal of groundwater in three subsided/subsiding regions China: deltaic plain Yangtse River (YRDP), North China Plain (NCP), and Fenwei (FP). On YRDP, Shanghai is typical city; on NCP Tianjin city, FP Taiyuan city. The subsided area over 200 mm YRDP about 10,000 km2 maximum value reached 2.9 m at Shanghai; 60,000 3.9 Tianjing; relatively smaller than that other two plains 1,135 3.7 In order protect civil industrial facilities, it necessary predict future development based present state. Many researchers proposed several according different geological conditions practice. classifies these into five categories: (i) statistical methods; (ii) 1D numerical method; (iii) quasi-3D seepage model; (iv) 3D (v) fully coupled model. China, former four categories are presently employed practice their merits demerits discussed. According practice, model best method presently.