西安地区由于过量开采地下水，引起地面急剧沉降。
The main reason for the ground subsidence is the excessive exploitation of underground water.
重力变化的主要原因是过量开采地下水，使含水系统压密，从而导致地面重力变化。
The main cause of the gravity variation is that groundwater has been over mined, thus, hydrous system is so pressed that ground gravity varies.
西安地区由于过量开采地下水，引起地层压密效应，造成地面急剧下沉与重力值急剧增加。
In Xi 'an area, because the groundwater has excessively been exploited, the press-dense effect of strata appears so that the ground subsides and the gravity value increases sharply.
由于不合理的使用水资源和过量开采地下水，在我国很多地区已产生严重的地下水环境问题。
Due to the unreasonable use of water resources and overexploitation of groundwater, in many areas of China has produced serious environmental problems.
河北平原地面沉降的原因，除少数有构造运动的因素以外，绝大多数都是集中过量开采地下水造成的。
In addition to a tectonic factor in a few subsidence areas, the causes of the ground subsidence of Hebei plain are mainly related to concentrated over-extraction of ground water.
河北平原地面沉降的原因，除少数有构造运动的因素以外，绝大多数都是集中过量开采地下水造成的。
In addition to a tectonic factor in a few subsidence areas, the causes of the ground subsidence of Hebei plain are mainly related to concentrated over-extraction of ground water.
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