井-含水层系统地下水类型定量分析和判别

利用水位、 气压和理论固体潮数据, 采用卷积回归法中水位对气压的阶跃响应函数， 定量地分析和判定了华北北部板桥井、 大灰厂井、 黄骅井、 大甸子井、 丰镇井和三号地井的井-含水层系统的地下水类型， 并结合研究时段内各井的气压系数和M₂波潮汐因子的结果进行了对比分析． 结果表明: ① 各井的滞后时间与阶跃响应函数之间存在明显的以e为底的指数函数关系， 且底数e的系数的正负决定了井-含水层系统的地下水类型； ② 承压井的阶跃响应函数随滞后时间的增大而增大， 且最佳阶跃响应函数值越大， 相应的气压系数和M₂波潮汐因子也越大， 反之亦然； ③ 潜水井和半承压水井的阶跃响应函数随滞后时间的增大而减小， 其最佳阶跃响应函数与气压系数和M₂波潮汐因子间的关系不明显， 可能与含水层的水力特性、 井孔结构及固体潮汐波的频率有关． 

Quantitative analysis and discrimination of groundwater type in well-aquifer system

In this study, we quantitatively analyzed and determined groundwater types of well-aquifer system for the wells Banqiao, Dahuichang, Huanghua, Dadianzi, Fengzhen and Sanhaodi by using water level, barometric pressure and theoretical earth tide. Furthermore, combining with step response function of water level to barometric pressure in convolutional regression, barometric coefficient and tidal factor of M₂ wave are comparatively analyzed for each well in the studied period. The results show that: ① an obvious exponential relationship exists between lag time and step response function with “e” as the bottom, and the sign symbol of the coefficient before the base “e” could determine groundwater types of well-aquifer system; ② step response function is growing with lag time increase for artesian wells, and the larger the optimal step response function value is, the larger barometric coefficient and tidal factor of M₂ wave are, and the reverse is also true; ③ step response function decreases with latency increase for phreatic and half artesian wells, and because of hydraulic characteristics of aquifer, borehole structures and frequency of solid tidal waves, the relationship between the optimal step response function and barometric coefficient, tidal factor of M₂ wave is inconspicuous.