A new modelling approach to simulate preferential flow and transport in water repellent porous media: Model structure and validation

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Abstract

Water repellent soil and surface layers exhibit a complex flow and transport mechanism. Knowledge of the underlying principles is essential, for instance, to simulate water availability for crops and to estimate leaching potentials of agrichemicals. The present study aims to introduce and apply a new modelling approach to simulate preferential flow and transport in water repellent porous media, and to test the model on basis of an extensive field tracer experiment. The process of preferential flow and transport has been incorporated in the well-known SWAP model and applied to field data of tracer transport through a water repellent sandy soil in the Netherlands. Flow concept and model structure have been outlined, and simulation results presented. Results indicated early arrival times of bromide tracer in the subsoil in the case where preferential flow has been taken into account in the model. Comparison of measured and computed bromide concentration profiles and bromide recovery rates show close resemblances. Several strategies to alleviate soil water repellency and prevent the occurrence of preferential flow and transport processes are highlighted, such as irrigation scheduling, clay additions, and application of surfactants
Original languageEnglish
Pages (from-to)361-369
JournalAustralian Journal of Soil Research
Volume43
Issue number3
DOIs
Publication statusPublished - 2005

Fingerprint

preferential flow
porous media
repellents
Model structures
Porous materials
porous medium
bromide
bromides
Bromides
water repellent soils
Water
tracer
tracer techniques
modeling
Soils
water
Agrochemicals
arrival time
transport process
subsoil

Keywords

  • unstable wetting fronts
  • sandy soil
  • layered soils
  • stability analysis
  • fingered flow
  • field soil
  • top layer
  • infiltration
  • surfactants
  • instability

Cite this

@article{5208d8e3924b425186c1ac5c95a8da99,
title = "A new modelling approach to simulate preferential flow and transport in water repellent porous media: Model structure and validation",
abstract = "Water repellent soil and surface layers exhibit a complex flow and transport mechanism. Knowledge of the underlying principles is essential, for instance, to simulate water availability for crops and to estimate leaching potentials of agrichemicals. The present study aims to introduce and apply a new modelling approach to simulate preferential flow and transport in water repellent porous media, and to test the model on basis of an extensive field tracer experiment. The process of preferential flow and transport has been incorporated in the well-known SWAP model and applied to field data of tracer transport through a water repellent sandy soil in the Netherlands. Flow concept and model structure have been outlined, and simulation results presented. Results indicated early arrival times of bromide tracer in the subsoil in the case where preferential flow has been taken into account in the model. Comparison of measured and computed bromide concentration profiles and bromide recovery rates show close resemblances. Several strategies to alleviate soil water repellency and prevent the occurrence of preferential flow and transport processes are highlighted, such as irrigation scheduling, clay additions, and application of surfactants",
keywords = "unstable wetting fronts, sandy soil, layered soils, stability analysis, fingered flow, field soil, top layer, infiltration, surfactants, instability",
author = "C.J. Ritsema and {van Dam}, J.C. and L.W. Dekker and K. Oostindie",
year = "2005",
doi = "10.1071/SR05054",
language = "English",
volume = "43",
pages = "361--369",
journal = "Australian Journal of Soil Research",
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TY - JOUR

T1 - A new modelling approach to simulate preferential flow and transport in water repellent porous media: Model structure and validation

AU - Ritsema, C.J.

AU - van Dam, J.C.

AU - Dekker, L.W.

AU - Oostindie, K.

PY - 2005

Y1 - 2005

N2 - Water repellent soil and surface layers exhibit a complex flow and transport mechanism. Knowledge of the underlying principles is essential, for instance, to simulate water availability for crops and to estimate leaching potentials of agrichemicals. The present study aims to introduce and apply a new modelling approach to simulate preferential flow and transport in water repellent porous media, and to test the model on basis of an extensive field tracer experiment. The process of preferential flow and transport has been incorporated in the well-known SWAP model and applied to field data of tracer transport through a water repellent sandy soil in the Netherlands. Flow concept and model structure have been outlined, and simulation results presented. Results indicated early arrival times of bromide tracer in the subsoil in the case where preferential flow has been taken into account in the model. Comparison of measured and computed bromide concentration profiles and bromide recovery rates show close resemblances. Several strategies to alleviate soil water repellency and prevent the occurrence of preferential flow and transport processes are highlighted, such as irrigation scheduling, clay additions, and application of surfactants

AB - Water repellent soil and surface layers exhibit a complex flow and transport mechanism. Knowledge of the underlying principles is essential, for instance, to simulate water availability for crops and to estimate leaching potentials of agrichemicals. The present study aims to introduce and apply a new modelling approach to simulate preferential flow and transport in water repellent porous media, and to test the model on basis of an extensive field tracer experiment. The process of preferential flow and transport has been incorporated in the well-known SWAP model and applied to field data of tracer transport through a water repellent sandy soil in the Netherlands. Flow concept and model structure have been outlined, and simulation results presented. Results indicated early arrival times of bromide tracer in the subsoil in the case where preferential flow has been taken into account in the model. Comparison of measured and computed bromide concentration profiles and bromide recovery rates show close resemblances. Several strategies to alleviate soil water repellency and prevent the occurrence of preferential flow and transport processes are highlighted, such as irrigation scheduling, clay additions, and application of surfactants

KW - unstable wetting fronts

KW - sandy soil

KW - layered soils

KW - stability analysis

KW - fingered flow

KW - field soil

KW - top layer

KW - infiltration

KW - surfactants

KW - instability

U2 - 10.1071/SR05054

DO - 10.1071/SR05054

M3 - Article

VL - 43

SP - 361

EP - 369

JO - Australian Journal of Soil Research

JF - Australian Journal of Soil Research

SN - 0004-9573

IS - 3

ER -