人类活动对哈尔滨市高铁地下水时空分布的影响

哈尔滨市区的第四系砂砾石含水层中，原生的高铁水广泛分布。在研究地下水质的演变规律时发现，近20年内，高铁地下水在各种人为活动影响下发生了很大变化。依据市区80个地下水动态监测井点近20年的水位及水质监测资料，研究了地下水中铁浓度的变化与地下水开采强度、雨水水质变化、农业施肥、污水排放等人类活动的关系。结果表明：地下水中的铁浓度与上述人类活动均存在较大的相关性，铁浓度动态呈现先增大后减小的变化趋势。

Impact of Human Activities on Spatial-Temporal Distribution of Groundwater with High Iron Concentration in Harbin City

Groundwater with an inherently high iron concentration is widely distributed in the quaternary system of sand and gravel aquifers in Harbin City. This study reveals that the groundwater quality in the region has changed with human activities in the last 20 years. The groundwater quality analysis was conducted, and the relation between the iron concentration and exploitation intensity, PH value of precipitation water, fertilizer use on farm land and the discharge of sewage were investigated, by using the recorded data of groundwater table and hydrochemistry over the last 20 years from 80 wells. The results show that there is a positively strong correlation between iron concentration in the groundwater and human activities. Variations in the dynamic curve of the iron concentration also reflect the above stated phenomenon. On the other hand, the study shows that the spatial distribution of iron concentration is related with the groundwater drawdown funnels. However, the formation of the drawdown funnel was noted to precede the occurrence of high iron concentration area.