在工业场地会议上评估土壤污染状况的地质统计方法

Florine Garcia, C. Cornet, Michel Garcia, J. Mathieu, J. Dumont
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引用次数: 1

摘要

本研究的重点是对生产场所内污染物质量的估计,以及与这些质量位置相关的空间不确定性的量化。目的是在将场地转让给另一家工业试验公司之前,对目前的土壤污染(现状)进行评估。所提出的方法方法依赖于土壤污染的地质统计建模,通过使用模拟方法生成大量真实和等概率的土壤污染物等级3D图像。这些图像是真实的,因为它们再现了等级数据及其观测到的空间变异性。它们是等概率的,因为它们都有相同的概率来表示实际的土壤污染。为了评估场地转移前的土壤污染,可以从整个场地或区域的模拟中估计原位污染物的质量和相关的不确定性。利用模拟,可以以足够高的置信度确定潜在土壤污染源可能存在或未发现的位置,以及土壤污染不确定的位置。污染源被定义为对应于污染物质量垂直积累超过饱和区以上某个临界阈值的区域。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Approche géostatistique appliquée à l’évaluation d’un état de pollution des sols dans le cadre d’une session de site industriel
This study focuses on the estimation of masses of contaminants in place inside a production site and the quantification of the spatial uncertainty related to the location of these masses. The aim is to provide an assessment of the current soil contamination (current status) before the transfer of the site to another indus-trial company. The proposed methodological approach relies on geostatistical modeling of the soil contamination by using a simulation method that generates a large number of realistic and equiprobable 3D images of grades for soil contaminants of interest. The images are realistic because they reproduce the grade data and their observed spatial variability. They are equiprobable in that they all have the same probability to represent the actual soil contamination. To assess the soil contamination before the site transfer, the masses of contaminants in place and the associated uncertainty can be estimated from the simulations, for the whole site or by zone. Using the simulations, it can be identified the locations where potential soil contami nation sources are likely to be or not found with high enough confidence, and those where the soil conta mination is uncertain. The sources of contamination are defined as corresponding to the areas where the vertical accumulation of contaminant mass exceeds some critical threshold above the saturated zone.
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