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广西北海市滨海平原分布有低矿化度(小于200mg/L)的潜水和承压水,天然状态下地下水的pH值为3.33~7.0,平均值为5.12,其中潜水3.67~7.0,平均值5.17;承压水3.33~6.97,平均值5.07。地下水的pH值没有显著的上升或者下降,部分监测孔有一定的波动,一般在丰水期要略高于枯水期。总体上,雨水的pH值高于潜水,潜水的pH值又略高于承压水,自内陆地区向海边,地下水的pH值呈略减小趋势。pH值较低的大气降水入渗补给和具有多层结构的越流含水系统,有利于这一地区偏酸性地下水的分布。
There is low salinity (less than 200mg / L) of submersible and confined water in the coastal plain of Beihai, Guangxi. Under natural conditions, the groundwater has a pH value of 3.33-7.0 with an average of 5.12, with a dive of 3.67-7.0 with an average of 5.17 Pressure water 3.33 ~ 6.97, average 5.07. The pH value of groundwater did not significantly increase or decrease, some of the monitoring holes have some fluctuations, generally slightly higher than the dry season in the wet season. In general, the pH of rainwater is higher than that of diving, and the pH value of diving is slightly higher than that of confined water. From the inland areas to the sea, the pH value of groundwater tends to decrease slightly. Precipitation infiltration recharge with lower pH value and multi-layer flow-through aquifer system are favorable for the distribution of acidic groundwater in this area.