基于T2VOC对比分析LNAPL多种因素运移的数值模拟  

Numerical simulation of LNAPL multi-factor migration based on T2VOC comparative analysis

作　　者：侯岳岚 夏源[2] 程亚平[2,3] 周正涛 HOU Yue-lan;XIA Yuan;CHENG Ya-ping;ZHOU Zheng-tao(Hydrology Center of Guilin City,Guilin 541199,China;Guilin University of Technology,Guilin 541006,China;Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin 541006,China)

机构地区：[1]桂林水文中心,广西桂林541199 [2]桂林理工大学,广西桂林541006 [3]岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541006

出　　处：《广西水利水电》2024年第1期52-57,63,共7页Guangxi Water Resources & Hydropower Engineering

基　　金：国家自然科学基金(51978188);广西科技计划项目(2019GXNSFDA245030)。

摘　　要：本文采用TOUGH2软件对LNAPL进行数值模拟,选取地下水流速率、LNAPL的泄漏强度、地下水位波动等影响因素,对比分析上述几种因素对LNAPL溶解速率的变化及其敏感度,为LNAPL的溶解迁移模拟提供源强依据。结果显示NAPL相饱和度对研究溶解速率变化起关键作用;影响LNAPL溶解速率变化因素:地下水流速率对溶解速率的敏感度最大,其次为地下水位波动的敏感度,泄露速率的敏感度最小。因此,对于地下水流速率较快与经常造成地下水位上升的污染源区,应当格外注意扩大液相的监测,对于渗透速率较快的污染源区,应当注意排查LNAPL的NAPL相。TOUGH2 software was used to conduct numerical simulation of LNAPL.The impacts and sensitivities of groundwater flow rate,LNAPL leakage intensity and groundwater level fluctuation on the dissolution rate of LNAPL were compared and analyzed,so as to provide the basis of source strength for the simulation of LNAPL dissolution and migration.The results of simulation show that NAPL phase saturation plays a key role in the dissolution rate.The factors affecting the dissolution rate of LNAPL are as follows:the sensitivity of groundwater flow rate to dissolution rate is the highest,followed by the sensitivity of groundwater level fluctuation,and the sensitivity of leakage rate is the lowest.Therefore,special attention should be paid to expand the monitoring of liquid phase for the pollution source areas with fast groundwater flow rate and frequent rise of groundwater level.For the pollution source areas with fast penetration rate,attention should be paid to investigate the NAPL phase of LNAPL.

关 键 词：LNAPL 地下水污染 敏感度分析 单因素分析法 数值模拟 

分 类 号：X131[环境科学与工程—环境科学]