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本文在分析苏08、苏15等井多年实测资料的基础上,从气压对水位动态的影响,水位相对于气压的滞后时间、气压系数及其变化、水位的气压改正等方面,对水位的气压效应作了初步探讨,得到如下几点认识。(1)反映井孔气压效应显著程度的主要指标是气压系数 b_p 的大小和水位相对于气压滞后时间的长短。(2)不同井孔的滞后时数(⊿T)应采用不同的方法加以确定。(3)可采用多种回归分析法计算 b_p 值。对于气压效应显著的井可采用日均值—阶差分回归法计算 b_p,其方法简便,效果良好。(4)由井—含水层系统本身性质、特征决定的气压系数,在正常情况下,数值相对稳定。经常地、定时地计算 b_p 可以监测井孔渗流条件的可能变化。
Based on the analysis of the measured data of well Su8 and Su15 for many years, this paper analyzes the influence of the pressure on the water level, the lag time of the water level relative to the air pressure, the change of the air pressure coefficient and the air pressure of the water level, Effect made a preliminary discussion, get the following understanding. (1) The main indexes that reflect the significant degree of well pressure effect are the size of pressure coefficient b_p and the length of the water level relative to the pressure lag time. (2) The lag hours (⊿T) of different boreholes should be determined by different methods. (3) A variety of regression analysis can be used to calculate the b_p value. For well with significant pressure effects, daily mean-step difference regression can be used to calculate b_p, and the method is simple and effective. (4) The barometric pressure coefficient determined by the nature and characteristics of the well-aquifer system is relatively stable under normal conditions. Often, regular calculation of b_p can monitor possible changes in wellbore seepage conditions.