Surface subsidence (ground depression) caused by the overuse of ground water.

过度抽取地下水引起的地面沉降。

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The basic framework, main functions and features of the establishment of land-surface subsidence and dynamic monitoring of groundwater information analysis system are discussed in the paper.

本文论述了建立城市地面沉降与地下水动态监测信息分析系统的基本框架、主要功能和特点。

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The influence of surface subsidence on ground building, caused by shield tunneling is concerned by more people, but the key of this problem is to pre-estimate the surface subsidence.

盾构掘进法开挖隧道引起的地表沉降对地面建筑物影响在地下工程施工中越来越受到人们的关注，而这个问题的关键是要对地表沉降进行预估。

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About half of the route is across permafrost, which poses particular challenges because of the danger of subsidence caused by melting at the surface in summer.

ECONOMIST: Tibet: High train | The