加油站地下水甲基叔丁基醚(MTBE)的迁移模拟研究.pdf

第11卷第1期
2016年3月
平
Vol11 No I
UI R GEOLOGY
March. 2016
doi:10.3969/.issn.1007-1903.2016.01.003
加油站地下水甲基叔丁基醚(MTBE)的迁移模拟研究
王鹏,周瑞静,宋炜,周磊
(北京市地质工程動察院,北京100048)
摘要:本文以北京市某加油站为何,在水文地质调查、地下水水质评价的基础上,采用 Visual MODFLOW模型进
行地下水流场及溶质运移模拟,预測MTBE在地下水中的迁移及污染趋势。结果表明:监测井水质污染现状为VI级
极重污染,主要贡献指标是錳和MTBE;所建立的模型基本达到精度要求,符合工作区水文地质条件,能基本反映该
区地下水系统动态特征;利用模型对地下水中MTBE的运移模拟可知,运移100天后,加油站下游约500m处潜水中
MTBE将检出,运移800天后,距离加油站最近的水源井一级保护区内潜水将能检出MTBE,1500天后,距离加油站
最近的水源井处潜水中的MTBE浓度将远超过0.5μg/L,另外运移2550天后,MIBE将影响至承压水,4015天后,
距离加油站最近的承压水水源井中MTBE的浓度将达到0.5ルg/L。
关键词:甲基叔丁基醚(MTBE);加油站;地下水;迁移模拟
中图分类号:X523文献标识码:A文章编号:1007-1903(2016)01-0010-06
Study on Transfer Simulation of Methyl Tertiary Butyl Ether (MTBE)in
Groundwater around Gas Station
WANG Peng, ZHOU Ruijing, SONG Wei, ZHOU Lei
(Beijing Institute of Geological and Prospecting Engineering, Beijing 100048)
Abstract: This case study was done at a gas station in Beijing. On the basis of field investigation of
hydrogeological condition and groundwater quality, the Visual MODFLOW is utilized to model subsurface flow
field and solute transportation to predict the migration characters and pollution tendency of MTBE in groundwater
The results show that the water pollution level at the monitoring well is up to level-vi(very serious pollution).The
major pollution factors are Mn and MTBE. The established model meets the requirements of simulation precision
after model identification and verification, and it fits the hydrogeological conditions of the research area, which can
reflect the dynamic characteristics of groundwater flow. By using the model to simulate MTBE migration, it has
found out: after 100 days, MTBE can be detected in the phreatic layer at the downstream of the gas station 500m
away; after 800 days, MTBE can be detected in the first-grade protection zone of the water supply well which is
closest to the gas station; after 1 500 days, the concentration of MTBE in the phreatic layer at the water supply we
near the gas station is more than OSug/L In addition, MTBE would migrate to the artesian aquifer after 2550 days
After 4015 days, the concentration of MTBE in the artesian aquifer at the water supply well would amount to 0.5
?gL.
Keywords: Methyl tertiary butyl ether(MTBE); Gas station; Groundwater; Transfer simulation
作者简介:王鹏(1985-),女,工程师,主要从事地下水资源、地下水环境研究。Fmai: fighting(@163:om