Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026098 |
Two Improvements to Gardner's Method of Measuring the Hydraulic Conductivity of Non-saturated Media: Accounting for Impedance Effects and Non-constant Imposed Suction Increment | |
Stanic, Filip1,2; Delage, Pierre1; Cui, Yu-Jun1; De Laure, Emmanuel1; Versini, Pierre-Antoine2; Schertzer, Daniel2; Tchiguirinskaia, Ioulia2 | |
2020 | |
发表期刊 | WATER RESOURCES RESEARCH
![]() |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2020 |
卷号 | 56期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | France |
英文摘要 | Gardner's (1956, https://doi.org/10.2136/sssaj1956.03615995002000030006x) transient method of measuring the hydraulic conductivity function of unsaturated media has been largely used, together with the improved graphical method proposed by Kunze and Kirkham (1962, https://doi.org/10.2136/sssaj1962.03615995002600050006x) to account for the impedance effect resulting from using a low hydraulic conductivity ceramic disk in porous plate testing. These methods are nowadays seldom used, since they have been replaced by numerical back analysis and methods for parameter optimization. Based on tests carried out on a specific device allowing to determine the water retention and transport properties of water in a coarse granular media at low suctions (up to 50 kPa), it was found necessary to account (i) for impedance effects and (ii) for the effects of nonconstant suction increments, as is often the case when using the hanging column technique. A new method is proposed to account for impedance effects, based on an analytical solution of the equations governing water transfer. The validity of this method is tested by considering experimental data from three distinct materials: a coarse green roof volcanic substrate, poorly graded sand, and undisturbed silty clay. Compared to the graphical method Kunze and Kirkham's method, it is less operator-dependent and hence more objective. It is also simpler than numerical back analysis methods, since it does not require any use of numerical code or parameter optimization algorithm, providing a more direct and reliable access to the hydraulic conductivity. An analytical solution is also proposed to solve the problem resulting from the application of a nonconstant suction increment. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000520132500013 |
WOS关键词 | MULTISTEP OUTFLOW |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280462 |
专题 | 资源环境科学 |
作者单位 | 1.Ecole Ponts ParisTech, Navier CERMES, Marne La Vallee, France; 2.Ecole Ponts ParisTech, HM&Co, Marne La Vallee, France |
推荐引用方式 GB/T 7714 | Stanic, Filip,Delage, Pierre,Cui, Yu-Jun,et al. Two Improvements to Gardner's Method of Measuring the Hydraulic Conductivity of Non-saturated Media: Accounting for Impedance Effects and Non-constant Imposed Suction Increment[J]. WATER RESOURCES RESEARCH,2020,56(1). |
APA | Stanic, Filip.,Delage, Pierre.,Cui, Yu-Jun.,De Laure, Emmanuel.,Versini, Pierre-Antoine.,...&Tchiguirinskaia, Ioulia.(2020).Two Improvements to Gardner's Method of Measuring the Hydraulic Conductivity of Non-saturated Media: Accounting for Impedance Effects and Non-constant Imposed Suction Increment.WATER RESOURCES RESEARCH,56(1). |
MLA | Stanic, Filip,et al."Two Improvements to Gardner's Method of Measuring the Hydraulic Conductivity of Non-saturated Media: Accounting for Impedance Effects and Non-constant Imposed Suction Increment".WATER RESOURCES RESEARCH 56.1(2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论