חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Numerical analysis of solute transport in variably saturated bimodal heterogeneous formations with mobile-immobile-porosity
Year:
2012
Source of publication :
Advances in Water Resources
Authors :
רוסו, דוד
;
.
Volume :
47
Co-Authors:
Russo, D., Department of Environmental Physics and Irrigation, Inst. of Soils Water and Environmental Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan 50250, Israel
Facilitators :
From page:
31
To page:
42
(
Total pages:
12
)
Abstract:
Considering flow and transport in three-dimensional, variably saturated, composite bimodal heterogeneous formations, the main purpose of this study was to extend the previous analyses [37], restricted to the one-region case in which the entire water-filled pore space is mobile, to the two-region case in which part of the water-filled pore space of each of the sub-soils of the composite formation is stagnant, and to investigate the effect of the interaction between the mobile and the immobile regions on solute transport in these formations. Following Russo [37], formations with fine- and coarse-textured embedded soils (FTES- and CTES-formations, respectively), were considered in the analyses. Main results of the present study suggest that mass exchange between the two regions masks features of the transport that exist in bimodal, one-region flow domains, related to characteristics of the unsaturated hydraulic conductivity in variably saturated bimodal, heterogeneous formations. In particular, the crossover behavior (i.e., that under relatively wet conditions, solute spread is larger in the FTES-formations than in the CTES-formations, while the opposite occurs under relatively dry conditions) characterizing one-region, bimodal flow domains disappears in two-region, bimodal flow domains. The latter attributes to the transfer of mass from the mobile region to the immobile region and the extension of the capture zone for the solute particles associated with the fine-textured embedded soil to lower water saturations. Consequently, for both steady state- and transient-flows, as water saturation decreases, the response of the composite formations is essentially independent of the texture of the embedded soil. © 2012 Elsevier Ltd.
Note:
Related Files :
Capture zones
Dry condition
Heterogeneous formation
Soils
three-dimensional flow
Water saturations
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.advwatres.2012.05.017
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
20954
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:40
You may also be interested in
Scientific Publication
Numerical analysis of solute transport in variably saturated bimodal heterogeneous formations with mobile-immobile-porosity
47
Russo, D., Department of Environmental Physics and Irrigation, Inst. of Soils Water and Environmental Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan 50250, Israel
Numerical analysis of solute transport in variably saturated bimodal heterogeneous formations with mobile-immobile-porosity
Considering flow and transport in three-dimensional, variably saturated, composite bimodal heterogeneous formations, the main purpose of this study was to extend the previous analyses [37], restricted to the one-region case in which the entire water-filled pore space is mobile, to the two-region case in which part of the water-filled pore space of each of the sub-soils of the composite formation is stagnant, and to investigate the effect of the interaction between the mobile and the immobile regions on solute transport in these formations. Following Russo [37], formations with fine- and coarse-textured embedded soils (FTES- and CTES-formations, respectively), were considered in the analyses. Main results of the present study suggest that mass exchange between the two regions masks features of the transport that exist in bimodal, one-region flow domains, related to characteristics of the unsaturated hydraulic conductivity in variably saturated bimodal, heterogeneous formations. In particular, the crossover behavior (i.e., that under relatively wet conditions, solute spread is larger in the FTES-formations than in the CTES-formations, while the opposite occurs under relatively dry conditions) characterizing one-region, bimodal flow domains disappears in two-region, bimodal flow domains. The latter attributes to the transfer of mass from the mobile region to the immobile region and the extension of the capture zone for the solute particles associated with the fine-textured embedded soil to lower water saturations. Consequently, for both steady state- and transient-flows, as water saturation decreases, the response of the composite formations is essentially independent of the texture of the embedded soil. © 2012 Elsevier Ltd.
Scientific Publication
נגישות
menu      
You may also be interested in