西安地区重力场时空变化特征研究

STUDY ON FEATURES SPACE-TIME VARIATION OF GRAVITY FIELD IN XI’AN REGION

概述了1992年以来西安地区的重力场时空变化特征。西安南郊的重力变化较大,北部地区相对稳定, 重力变化显著的地区是地面沉降严重的地区。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。

Space-time variation of gravity in Xi’an since 1992 is summarized. The gravity variation in southern suburb of Xi’an is considerably, and the gravity in northern suburb of Xi’an is relatively stable. Where there gravity varies obviously, there ground subsides seriously. The main cause of the gravity variation is that groundwater has been over mined, thus, hydrous system is so pressed that ground gravity varies.