天津市地面沉降特征研究

天津市地面沉降分布和产业布局有关，其深层沉降比重较大。全市平均沉降量与平均降水量密切相关，年度沉降随季节变化，部分地区地面沉降过程具有可逆性。

Research on the Characteristic and Rule of Land Subsidence in Tianjin

Based on the latest status of land subsidence in Tianjin, data of leveling, GPS continuous operating stations and borehole extensometer are used respectively to calculate the accurate subsidence magnitude. Statistics and analysis show that land subsidence exhibits the inherent characteristic and rule. On the one hand, the plane distribution of land subsidence is apparently related to that of industry, and deep layer soil subsidence appears to dominate. On the other hand, the average annual subsidence and average annual precipitation are strongly coupled in recent years, and velocity of subsidence varies with the season, which also indicates subsidence is reversible in some region. The result should be helpful to research on land subsidence and formulate measures for controlling land subsidence.