{"title":"Experimental assessment of solute dispersion in stratified porous media","authors":"T. Kurasawa, Mariko Suzuki, Kazuya Inoue","doi":"10.3178/hrl.14.123","DOIUrl":null,"url":null,"abstract":": The objective of this paper is to evaluate effects of strati‐ fied porous formation on solute dispersion using two-dimensional laboratory tracer tests. An image analysis tech‐ nique was used to analyze the solute dispersion processes and quantify the dispersivity and behaviors of forward and backward tails of solute plumes. Longitudinal dispersivity estimates for the stratified porous media increased with travel distance and are in reasonable agreement with previ‐ ous work. Moreover, in all of the stratified cases the trans‐ verse dispersivity exhibited a similar trend which decayed with travel distance. The summary of dispersivities esti‐ mated from this study and previous studies suggests that if both degree of heterogeneity and scale for stratified and randomly heterogeneous porous media are similar, the lon‐ gitudinal dispersivity is larger in stratified media than in randomly heterogeneous media. In order to quantify behav‐ iors of forward and backward tails, we defined the travel distances x 05 and x 95 corresponding to the 5th and 95th per‐ centiles, respectively, of the cumulative concentrations in the longitudinal direction, and found that the distance between x 05 and x 95 spread out linearly in the stratified cases.","PeriodicalId":13111,"journal":{"name":"Hydrological Research Letters","volume":"29 1","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Hydrological Research Letters","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3178/hrl.14.123","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"WATER RESOURCES","Score":null,"Total":0}
引用次数: 4
Abstract
: The objective of this paper is to evaluate effects of strati‐ fied porous formation on solute dispersion using two-dimensional laboratory tracer tests. An image analysis tech‐ nique was used to analyze the solute dispersion processes and quantify the dispersivity and behaviors of forward and backward tails of solute plumes. Longitudinal dispersivity estimates for the stratified porous media increased with travel distance and are in reasonable agreement with previ‐ ous work. Moreover, in all of the stratified cases the trans‐ verse dispersivity exhibited a similar trend which decayed with travel distance. The summary of dispersivities esti‐ mated from this study and previous studies suggests that if both degree of heterogeneity and scale for stratified and randomly heterogeneous porous media are similar, the lon‐ gitudinal dispersivity is larger in stratified media than in randomly heterogeneous media. In order to quantify behav‐ iors of forward and backward tails, we defined the travel distances x 05 and x 95 corresponding to the 5th and 95th per‐ centiles, respectively, of the cumulative concentrations in the longitudinal direction, and found that the distance between x 05 and x 95 spread out linearly in the stratified cases.
期刊介绍：
Hydrological Research Letters (HRL) is an international and trans-disciplinary electronic online journal published jointly by Japan Society of Hydrology and Water Resources (JSHWR), Japanese Association of Groundwater Hydrology (JAGH), Japanese Association of Hydrological Sciences (JAHS), and Japanese Society of Physical Hydrology (JSPH), aiming at rapid exchange and outgoing of information in these fields. The purpose is to disseminate original research findings and develop debates on a wide range of investigations on hydrology and water resources to researchers, students and the public. It also publishes reviews of various fields on hydrology and water resources and other information of interest to scientists to encourage communication and utilization of the published results. The editors welcome contributions from authors throughout the world. The decision on acceptance of a submitted manuscript is made by the journal editors on the basis of suitability of subject matter to the scope of the journal, originality of the contribution, potential impacts on societies and scientific merit. Manuscripts submitted to HRL may cover all aspects of hydrology and water resources, including research on physical and biological sciences, engineering, and social and political sciences from the aspects of hydrology and water resources.
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