Impact of the loess’ hydraulic characteristics on its degree of saturation for the purpose of radon index measurements (Northeast Bulgaria case study)

IF 0.2 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society Pub Date : 2022-12-01 DOI:10.52215/rev.bgs.2022.83.3.271

M. Trayanova, B. Kunovska, Simeon Valchev

{"title":"Impact of the loess’ hydraulic characteristics on its degree of saturation for the purpose of radon index measurements (Northeast Bulgaria case study)","authors":"M. Trayanova, B. Kunovska, Simeon Valchev","doi":"10.52215/rev.bgs.2022.83.3.271","DOIUrl":null,"url":null,"abstract":"Radon gas has high mobility and is driven by advection and diffusion with the soil gas throughout connected and water-unsaturated pores and/or cracks in permeable rocks and soils. Therefore, there is a need for quantitative assessment of the saturation state, even on a daily-base in order to estimate the radon potential correctly. The more so as, the permeability is one of the key factors in the radon risk assessment. For the purpose of such investigation, a vertical profile model was elaborated for a study site in Northeast Bulgaria. On the base of pedotransfer function analyses, the hydraulic parameters describing the retention function and the hydraulic conductivity function were determined for each case study. The results show that even in a month with high amount of rainfall precipitation (13% of the total amount per year), the loess profile at certain depths remains unsaturated, regardless the difference in the hydraulic characteristics.","PeriodicalId":40733,"journal":{"name":"Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society","volume":" ","pages":""},"PeriodicalIF":0.2000,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.52215/rev.bgs.2022.83.3.271","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Radon gas has high mobility and is driven by advection and diffusion with the soil gas throughout connected and water-unsaturated pores and/or cracks in permeable rocks and soils. Therefore, there is a need for quantitative assessment of the saturation state, even on a daily-base in order to estimate the radon potential correctly. The more so as, the permeability is one of the key factors in the radon risk assessment. For the purpose of such investigation, a vertical profile model was elaborated for a study site in Northeast Bulgaria. On the base of pedotransfer function analyses, the hydraulic parameters describing the retention function and the hydraulic conductivity function were determined for each case study. The results show that even in a month with high amount of rainfall precipitation (13% of the total amount per year), the loess profile at certain depths remains unsaturated, regardless the difference in the hydraulic characteristics.

查看原文本刊更多论文

黄土水力特性对其饱和度的影响——以氡指数测量为例(保加利亚东北部为例)

氡气具有很高的流动性，是由土壤气体在透水岩石和土壤中的连通孔隙和/或裂隙中的平流和扩散驱动的。因此，有必要对饱和状态进行定量评估，即使是在每天的基础上，以便正确估计氡势。渗透性是氡风险评估的关键因素之一。为了进行此类调查，为保加利亚东北部的一个研究地点制定了垂直剖面模型。在土壤传递函数分析的基础上，确定了每个案例研究中描述滞留函数和导水函数的水力参数。结果表明，即使在降雨量高（每年占总降雨量的13%）的月份，无论水力特性的差异如何，一定深度的黄土剖面仍保持非饱和状态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society GEOSCIENCES, MULTIDISCIPLINARY-

自引率

50.00%

发文量