摘要
以贵阳市城区为研究对象,通过收集整理2001—2014年地下水水质及水位监测点数据,并采集市区及市郊地下水样14组进行δ34S-SO2-4同位素分析,研究了城镇化对浅层地下水的水位动态、水化学作用及组分产生的影响。结果表明:研究区内地下水位变幅呈减小趋稳,且变化趋势在空间和时间上与城镇化方向和时间一致,原因在于地下水的停采导致水位抬升,地面硬化和城市给排水管网渗漏大幅削弱了地下水位的季节性和年际的波动;城镇化使地下水溶滤作用减弱,硫酸盐和氯化物的输入有所增加,硫同位素分析进一步表明城镇化区域地下水中的硫酸盐较非城镇化区域更多地受到人为活动的影响,且中心城区的超标现象多于非中心城区。
This paper collects and collates the data of groundwater quality and groundwater level of monitoring wells from 2001 to 2014 in urban area of Guiyang.Based on the analysis of those data and the isotopic characteristics of 14 samples of groundwater collected from urban and suburban area,the paper analyzes the effect of urbanization on dynamic and hydrochemistry of shallow groundwater.The results show that the groundwater level amplitude in the research area reduced and stabilized,and the change trend is consistent with the urbanization in space and time.The reasons are that stopping groundwater exploitation causes the groundwater level to rise,and the surface hardening and the leakage of underground drainage network weakens the seasonal and interannual fluctuation of groundwater level.Urbanization attenuates the leaching and increases the sulfate and chloride input.Sulfur isotope analysis further suggests that sulfates in the groundwater of urbanized areas are more affected by human activities than those in the groundwater of nonurbanized areas.Moreover,the phenomenon of component exceeding standards in the central city is more than the surrounding areas.
出处
《安全与环境工程》
CAS
2017年第4期1-9,共9页
Safety and Environmental Engineering
基金
贵州省公益性
基础性地质工作项目(黔国土资地环函[2014]23)
关键词
城镇化
浅层地下水
水位动态
水化学作用
硫同位素
贵阳地区
urbanization
shallow groundwater
water level dynamic
hydrochemical action
sulfur isotope
Guiyang Area
