Effect of hysteresis on water flow in the vadose zone under natural boundary conditions, Siloam Village case study, South Africa-Reference-Cited by-同舟云学术

Effect of hysteresis on water flow in the vadose zone under natural boundary conditions, Siloam Village case study, South Africa

Published:2017-10-17 Issue:1 Volume:20 Page:88-99
ISSN:1464-7141
Container-title:Journal of Hydroinformatics
language:en
Short-container-title:

Author:

Arrey I. A.¹,Odiyo J. O.¹,Makungo R.¹,Kataka M. O.²

Affiliation:

1. Department of Hydrology and Water Resources, School of Environmental Sciences, University of Venda, P/Bag X5050, Thohoyandou 0950, South Africa

2. Department of Mining and Environmental Geology, School of Environmental Sciences, University of Venda, P/Bag X5050, Thohoyandou, 0950, South Africa

Abstract

Abstract A one-dimensional vadose zone model was used to simulate flow under natural boundary conditions. The effects of hysteresis and temporal variability of meteorological conditions were evaluated. Simulations were performed in HYDRUS-1D code for the period April 2013–January 2014 (6601 hours) at three different locations in a delineated portion of the sub-quaternary catchment A80A of Nzhelele with different soil textures. Soil hydraulic characteristics were estimated in a Rosetta library dynamically linked to the HYDRUS-1D model which is based on the numerical solution of a one-dimensional Richard's equation. Analysis of the simulation results suggests that ignoring hysteresis for soils of similar textural class does not lead to any significant deviation of the model predicted soil moisture, unlike for soils with different textural classes.

Publisher

IWA Publishing

Subject

Atmospheric Science,Geotechnical Engineering and Engineering Geology,Civil and Structural Engineering,Water Science and Technology

Link

http://iwaponline.com/jh/article-pdf/20/1/88/237933/jh0200088.pdf

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