Recently, we have developed a two-dimensional analytical petroleum vapor intrusion model, PVI2D (petroleum vapor intrusion, two-dimensional), which can help users to easily visualize soil gas concentration profiles and indoor concentrations as a function of site-specific conditions such as source strength and depth, reaction rate constant, soil characteristics, and building features. In this study, we made a full comparison of the results returned by PVI2D and those obtained using Abreu and Johnson's three-dimensional numerical model (AJM). These comparisons, examined as a function of the source strength, source depth, and reaction rate constant, show that PVI2D can provide similar soil gas concentration profiles and source-to-indoor air attenuation factors (within one order of magnitude difference) as those by the AJM. The differences between the two models can be ascribed to some simplifying assumptions used in PVI2D and to some numerical limitations of the AJM in simulating strictly piecewise aerobic biodegradation and no-flux boundary conditions. Overall, the obtained results show that for cases involving homogenous source and soil, PVI2D can represent a valid alternative to more rigorous three-dimensional numerical models.

中文翻译：

---

PVI2D 与 Abreu-Johnson 石油蒸气侵入评估模型的比较


最近，我们开发了一种二维分析石油蒸气入侵模型 PVI2D（石油蒸气入侵，二维），它可以帮助用户轻松可视化土壤气体浓度剖面和室内浓度作为特定场地条件的函数，例如源强度和深度、反应速率常数、土壤特性和建筑特征。在本研究中，我们对PVI2D返回的结果与使用Abreu和Johnson的三维数值模型（AJM）获得的结果进行了全面的比较。这些比较作为源强度、源深度和反应速率常数的函数进行检查，表明 PVI2D 可以提供与通过AJM。两个模型之间的差异可归因于 PVI2D 中使用的一些简化假设以及 AJM 在模拟严格分段好氧生物降解和无通量边界条件时的一些数值限制。总体而言，获得的结果表明，对于涉及同质源和土壤的情况，PVI2D 可以代表更严格的三维数值模型的有效替代方案。