Johnson-Ettinger蒸气入侵风险评估模型参数修正研究
Parameters Modification of Johnson-Ettinger Vapor Intrusion Risk Assessment Model
-
摘要: Johnson-Ettinger蒸气入侵模型(J-E模型)作为目前应用最广泛的评价蒸气入侵潜在风险的筛选工具，其模型预测结果的准确性影响蒸气入侵风险的判断。通过对J-E模型进行敏感性分析，发现对其预测结果影响较大的参数依次为土壤毛细管层含水率、空气交换指数、封闭空间的体积以及毛细管层的厚度。基于以上分析结果，提出采用美国环境保护局(US EPA)推荐的饱和含水率对毛细管层含水率进行修正，毛细管层厚度采用VG方程描述的水分特征曲线拐点处的毛细管压头进行修正。修正后的J-E模型预测结果与三维数值模拟的计算结果较为吻合，两者的差距不到1个数量级。Abstract: At present, the Johnson-Ettinger (J-E) model is the most popular screening tool for evaluating the potential risk of vapor intrusion, which is a process by that the contaminant soil gas migrate from a subsurface vapor source into the building. In this study, a sensitivity analysis of J-E model was performed to identify most important parameters. The analysis suggests that the soil moisture content in the capillary fringe is of the greatest influence, followed by air exchange rate, enclosed space volume and thickness of capillary fringe. Based on such results, the study proposed to employ a saturated water content in the capillary fringe and the capillary head at inflection point of water retention curve as the thickness of the capillary fringe. After the application of this modification, the model predictions are in better agreement with three-dimensional numerical simulations, with differences less than one order of magnitude.
-
Key words:
- J-E model /
- risk assessment /
- sensitivity analysis /
- parameter modification
-
-
U.S. Environmental Protection Agency (US EPA). What is vapor intrusion[EB/OL].(2012-01-01)[2021-07-01]. https://www.epa.gov/vaporintrusion/what-vapor-intrusion U.S. Environmental Protection Agency (US EPA). Technical guide for assessing and mitigating the vapor intrusion pathway from subsurface vapor source to indoor (OSWER)[R]. Washington DC:US EPA, 2015 ASTM. Standard guide for risk based corrective action applied at petroleum release sites[S]. Washington,D,C:American Society of Testing Materials 1995 Johnson P C, Ettinger R A. Heuristic model for predicting the intrusion rate of contaminant vapors into buildings[J]. Environmental Science&Technology, 1991, 25(8):1445-1452 芦伟,李忠元,杨洁,等.箱体实验验证Johnson&Ettinger蒸气入侵模型[J].华东理工大学学报:自然科学版, 2018, 44(3):382-389 Lu W, Li Z Y, Yang J, et al. Experimental validation of Johnson&Ettinger vapor intrusion model with a scale model[J]. Journal of East China University of Science and Technology:Natural Science Edition, 2018, 44(3):382-389(in Chinese)
Hers I, Zapf-Gilje R, Johnson P C, et al. Evaluation of the Johnson and Ettinger model for prediction of indoor air quality[J]. Groundwater Monitoring&Remediation, 2003, 23(2):119-133 Yao Y J, Shen R, Pennel K G, et al. A numerical investigation of oxygen concentration dependence on biodegradation rate laws in vapor intrusion[J]. Environmental Science Processes&Impacts, 2013, 15(12):2345-2354 Yao Y J, Pennell K G, Surberg E M. Simulating the effect of slab features on vapor intrusion of crack entry[J]. Building and Environment, 2013, 59:417-425 中华人民共和国生态环境部.建设用地土壤污染风险评估技术导则:HJ25.3-2019[S].北京:中华人民共和国生态环境部, 2019 雷城英,李玉进,王梦珂,等. C-RAG模型在砷污染场地中的修正及应用研究[J].生态毒理学报, 2021, 16(1):147-154 Lei C Y, Li Y J, Wang M K, et al. Research on modification and application of C-RAG model in arsenic contaminated site[J]. Asian Journal of Ecotoxicology, 2021, 16(1):147-154(in Chinese)
Hers I, Zapf-Gilje R, Evans D, et al. Comparison, validation, and use of models for predicting indoor air quality from soil and groundwater contamination[J]. Soil and Sediment Contamination:An International Journal, 2002, 11(4):491-527 Johnston J E, Sun Q, Gibson J M. Updating exposure models of indoor air pollution due to vapor intrusion:Bayesian calibration of the Johnson-Ettinger model[J]. Environmental Science&Technology, 2014, 48(4):2130-2138 Clewell R A, Merrill E A, Yu K O, et al. Predicting fetal perchlorate dose and inhibition of iodide kinetics during gestation:A physiologically-based pharmacokinetic analysis of perchlorate and iodide kinetics in the rat[J]. Toxicological Sciences, 2003, 73(2):235-255 Abreu L D V, Johnson P C. Effect of vapor source-building separation and building construction on soil vapor intrusion as studied with a three-dimensional numerical model[J]. Environmental Science&Technology, 2005, 39(12):4550-4561 U.S. Environmental Protection Agency (US EPA). Documentation for EPA's implementation of the Johnson and Ettinger model to evaluate site specific vapor intrusion into buildings[S]. Washington DC:US EPA, 2017 Yao Y J, Shen R, Pennell K G, et al. Comparison of the Johnson-Ettinger vapor intrusion screening model predictions with full three-dimensional model results[J]. Environmental Science&Technology, 2011, 45(6):2227-2235 Shen R, Pennell K G, Surberg E M. Influence of soil moisture on soil gas vapor concentration for vapor intrusion[J]. Environmental Engineering Science, 2013, 30(10):628-637 Dexter A R, Bird N R A. Methods for predicting the optimum and the range of soil water contents for tillage based on the water retention curve[J]. Soil and Tillage Research, 2001, 57(4):203-212 Moradi A, Tootkaboni M, Pennell K G. A variance decomposition approach to uncertainty quantification and sensitivity analysis of the Johnson and Ettinger model[J]. Journal of the Air&Waste Management Association, 2015, 65(2):154-164 黄凤莲,杜红花,陈跃辉,等.基于居住用地规划室内蒸汽入侵模型修正的污染场地健康风险评估应用研究[J].湘潭大学学报:自然科学版, 2020, 42(1):76-85 Huang F L, Du H H, Chen Y H, et al. Health risk assessment of contaminated sites based on modification of indoor vapor invasion model in residential land planning[J]. Journal of Xiangtan University:Natural Science Edition, 2020, 42(1):76-85(in Chinese)
-
点击查看大图
计量
- 文章访问数: 2081
- HTML全文浏览数: 2081
- PDF下载数: 65
- 施引文献: 0
下载:
