摘要
为研究怀柔、密云区近年地下水水质变化情况,根据2012—2021年地下水水质监测结果,对2021年研究区域地下水进行质量评价,并从时间尺度分析东北部地区近10年地下水水质变化特征,研究结论为:①通过单因子评价法得知2021年研究区域地下水主要污染物为硝酸盐氮,密云区地下水质量总体优于怀柔区。②通过改进内梅罗指数法得知2021年研究区域地下水水质集中在II类,水质整体处于优良水平。③年际变化:2012—2021年研究区域地下水6项水质指标均呈先上升后下降趋势,高值均出现在2016、2017年。④年内变化:2012—2021年,在大多数年份多数指枯水期含量偏高。⑤年内逐月变化:多数指标4月含量偏高,之后呈下降趋势,9月地下水指标含量再次升高,持续到11月之后下降。
In order to study the groundwater quality changes of Huairou and Miyun districts in recent years,based on the groundwater quality monitoring results from 2012 to 2021,the groundwater quality of the studied area in 2021 was evaluated,and the change characteristics of groundwater quality of northeast area in the last 10 years were ana⁃lyzed from time scale.The research conclusions are as follows:(1)By single factor evaluation method,it is conclud⁃ed that the main groundwater pollutant of the studied area in 2021 is nitrate nitrogen,and the groundwater quality of Miyun District is generally better than that of Huairou District.(2)By improved Nemero index method,it is conclud⁃ed that the groundwater quality of the studied area in 2021 is concentrated in class II,and the overall water quality is at an excellent level.(3)Inter-annual changes:the six groundwater quality indexes of the studied area showed an upward and then a downward trend from 2012 to 2021,with all high values appeared in 2016 and 2017.(4)Annual changes:in most years from 2012 to 2021,the contents of most indexes were relatively high in dry season.(5)Month⁃ly changes in the year:the contents of most indexes were relatively high in April and then showed a downward trend.The contents of groundwater indexes increased again in September and continued until they decline after November.
作者
李亚楠
胡春春
康莹
张新
刘冬跃
李心月
LI Ya-nan;HU Chun-chun;KANG Ying;ZHANG Xin;LIU Dong-yue;LI Xin-yue(Beijing Miyun Reservoir Management Office,Beijing 101512,China;Beijing Guanting Reservoir Management Office,Zhangjiakou 075441,China)
出处
《广西水利水电》
2023年第6期38-44,共7页
Guangxi Water Resources & Hydropower Engineering
关键词
地下水
水质
内梅罗指数法
变化特征
北京市东北部地区
groundwater
water quality
Nemero index method
change characteristics
northeast Beijing
