超采对昌黎井地下水位气压效应的影响分析

Analysis on the Effect of Overmining on Groundwater Pressure in Changli Well

利用小波交叉和相干计算、一元线性回归等方法,对昌黎井地下水位超采干扰前后气压效应进行分析和探讨。研究表明,昌黎井水位与气压日变化存在负相关,相关系数偏低,但不论有无超采干扰,水位相位均超前气压相位3 h,但气压系数大小会随干扰程度不同发生变化。两者12 h和24 h的周期显著;多年周期分析中1 a尺度周期明显,但受超采影响水位相位从超前变为滞后。

Using wavelet crossover and coherence calculation and unitary linear regression method,we analyze and discuss the pressure effect before and after groundwater overmining interference in Changli well.The results show that there is a negative correlation between the water level and the daily variation of pressure in Changli well,and the correlation coefficient is low.However,regardless of the presence of overproduction interference,the phase of water level is about 2 to 3 h ahead of the pressure phase,but the pressure coefficient changes slightly with the degree of interference.The 12 h and 24 h cycles are significant.In the multi-year cycle analysis,the 1-year scale cycle is obvious,but the phase of water level changes from advance to lag due to overmining.