Interpretation of ponded infiltration data using numerical experiments

[img]
Preview
PDF
Language: English
748Kb
Title:Interpretation of ponded infiltration data using numerical experiments
Creators:
Dohnal, Michal; michal dot dohnal at cvut dot cz ; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29, Prague, Czech Republic.
Vogel, Tomas; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29, Prague, Czech Republic.
Dusek, Jaromir ; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29, Prague, Czech Republic.
Votrubova, Jana ; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29, Prague, Czech Republic.
Tesar, Miroslav ; Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic, Pod Paťankou 5, Prague 6, Czech Republic.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 64, 3, pp. 289-299
Uncontrolled Keywords:ponded infiltration experiment, two-parameter infiltration equation, three-dimensional axisymmetric dualcontinuum model, preferential flow

Abstract

Ponded infiltration experiment is a simple test used for in-situ determination of soil hydraulic properties, particularly saturated hydraulic conductivity and sorptivity. It is known that infiltration process in natural soils is strongly affected by presence of macropores, soil layering, initial and experimental conditions etc. As a result, infiltration record encompasses a complex of mutually compensating effects that are difficult to separate from each other. Determination of sorptivity and saturated hydraulic conductivity from such infiltration data is complicated. In the present study we use numerical simulation to examine the impact of selected experimental conditions and soil profile properties on the ponded infiltration experiment results, specifically in terms of the hydraulic conductivity and sorptivity evaluation. The effect of following factors was considered: depth of ponding, ring insertion depth, initial soil water content, presence of preferential pathways, hydraulic conductivity anisotropy, soil layering, surface layer retention capacity and hydraulic conductivity, and presence of soil pipes or stones under the infiltration ring. Results were compared with a large database of infiltration curves measured at the experimental site Liz (Bohemian Forest, Czech Republic). Reasonably good agreement between simulated and observed infiltration curves was achieved by combining several of factors tested. Moreover, the ring insertion effect was recognized as one of the major causes of uncertainty in the determination of soil hydraulic parameters.

Official URL: http://147.213.145.2/vc/vc1.asp

Title:Interpretation of ponded infiltration data using numerical experiments
Translated title:Interpretation of ponded infiltration data using numerical experiments
Creators:
Dohnal, Michal; michal dot dohnal at cvut dot cz ; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29, Prague, Czech Republic.
Vogel, Tomas; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29, Prague, Czech Republic.
Dusek, Jaromir ; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29, Prague, Czech Republic.
Votrubova, Jana ; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29, Prague, Czech Republic.
Tesar, Miroslav ; Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic, Pod Paťankou 5, Prague 6, Czech Republic.
Uncontrolled Keywords:ponded infiltration experiment, two-parameter infiltration equation, three-dimensional axisymmetric dualcontinuum model, preferential flow
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:64
Number:3
Page Range:pp. 289-299
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:8671
Item Type:Article
Deposited On:18 Aug 2016 14:26
Last Modified:18 Aug 2016 12:26

Citation

Dohnal, Michal; Vogel, Tomas; Dusek, Jaromir; Votrubova, Jana; Tesar, Miroslav (2016) Interpretation of ponded infiltration data using numerical experiments. Journal of Hydrology and Hydromechanics, 64 (3). pp. 289-299. ISSN 0042-790X

Repository Staff Only: item control page