干旱区生态环境知识资源中心(Arid): 某污染场地地下水硝态氮迁移过程的数值模拟

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	某污染场地地下水硝态氮迁移过程的数值模拟
其他题名	NUMERICAL SIMULATION OF TRANSFER PROCESS OF NITRATE NITROGEN IN GROUNDWATER OF A POLLUTED SITE
	郑富新 1; 尹芝华 1; 杜青青 1; 夏雪莲 1; 翟远征 1; 左锐 1; 王金生 1; 滕彦国 1; 杨光 2
来源期刊	环境工程
ISSN	1000-8942
出版年	2018
卷号	36 期号:12 页码:103-107
中文摘要	以西北某沙漠地区的废水排放场地为例,利用Visual MODFLOW 2010.1软件构建污染物溶质运移模型,模拟废水中硝态氮在该场地饱和带地下水中的迁移、扩散和衰减规律,从而定量模拟预测未来20年内污染晕的扩散范围和浓度变化趋势。结果表明:含硝态氮废水在进入含水层后对地下水造成明显污染。随着时间延长,地下水中污染晕的范围在水平方向上呈椭圆状缓慢扩大,污染中心区地下水硝态氮浓度明显降低。受场地地下水水力梯度的限制,地下水流动缓慢,污染晕的空间扩散范围非常有限。废水进入含水层后第1年、第5年、第10年和第20年年末,污染晕的水平分布面积分别为18.52万,21.25万,24.15万,28.24万m~2,面积平均扩散速率为0.512万m~2/a;硝态氮的最大浓度分别为1.32,0.68,0.27,0.14 mg/L。污染晕中心相对于第1年、第5年、第10年和第20年分别沿地下水流线方向迁移447.21,948.68,1 755.63 m,距离平均迁移距离为87.78 m/a。在切断污染源后,随着时间延长,废水排放对地下水水质产生的影响将逐渐减弱,最终能够达到可接受水平。
英文摘要	In this paper,a wastewater discharge site in a desert area of northwestern China was taken as an example,and the Visual MODFLOW 2010.1 software was used to construct a solute transport model for pollutants to simulate the transfer,diffusion and attenuation rule of nitrate nitrogen in the groundwater of the saturated zone in the site,so as to quantitatively predict the diffusion range and variation tend of concentration of pollution halo in the next 20 years.The results showed that the wastewater containing nitrate nitrogen had caused significant pollution to groundwater after entering the aquifer.As time went on,the pollution halo in groundwater slowly expanded in oval shape in horizontal direction,and the concentration of nitrate nitrogen in the groundwater of pollution centre area reduced significantly.Due to the limitation of hydraulic gradients of groundwater in the site,the groundwater flow was very slow,and the spatial diffusion of the pollution halo was limited.At the end of the 1st year,the 5th year,the 10th year and the 20th year after the waste water entering the aquifer,the horizontal distribution area of pollution halo was 185 200,212 500,241500,282 400 m~2,and the average area diffusion rate was 0.512 m~2/a;the maximum concentrations of nitrate nitrogen were 1.32,0.68,0.27,0.14 mg/L respectively.Compared with the location of centre of pollution halo in the first year,the centre of pollution halo displaced 447.21,948.68,1 755.63 meters respectively,along the direction of groundwater flow line direction in year 5,year 10 and year 20,with an average rate of 87.78 m/a.After the source of pollution shut off,the impact of wastewater discharge on groundwater quality would gradually diminish,and eventually reached an acceptable level.
中文关键词	硝态氮 ; 污染场地 ; 迁移扩散 ; 饱和带
英文关键词	Visual MODFLOW nitrate nitrogen polluted sites transfer and diffusion visual MODFLOW saturated zone
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6399621
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237838
作者单位	1.北京师范大学水科学研究院, 北京 100875, 中国; 2.哈尔滨供水集团有限责任公司, 哈尔滨, 黑龙江 150080, 中国
推荐引用方式 GB/T 7714	郑富新,尹芝华,杜青青,等. 某污染场地地下水硝态氮迁移过程的数值模拟[J]. 北京师范大学,2018,36(12):103-107.
APA	郑富新.,尹芝华.,杜青青.,夏雪莲.,翟远征.,...&杨光.(2018).某污染场地地下水硝态氮迁移过程的数值模拟.环境工程,36(12),103-107.
MLA	郑富新,et al."某污染场地地下水硝态氮迁移过程的数值模拟".环境工程 36.12(2018):103-107.