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Mathematical modelling of water and solute movement in ridged versus flat planting systems

Mathematical modelling of water and solute movement in ridged versus flat planting systems
Mathematical modelling of water and solute movement in ridged versus flat planting systems
We compared water and solute movement between a ridge and furrow geometry and that of flat soil with a mathematical model. We focused on the effects of two physical processes: root water uptake and pond formation on the soil surface. The mathematical model describes the interaction between solute transport, water movement and surface pond depth. Numerical simulations were used to determine how solutes of varying mobility and rates of degradation penetrated into the two soil geometries over a growing season. Both the ridge and furrow or flat soil geometries could reduce solute leaching, but this depended on several factors. Rain immediately after a solute application was a key factor in determining solute penetration into soil. In cases with delayed rain after a solute application, solutes in ridge and furrow geometries collected adjacent to the root system, resulting in reduced solute penetration compared to the flat soil geometry. In contrast, substantial rain immediately after a solute application resulted in ponding where water infiltration acted as the dominant transport mechanism. This resulted in increased solute penetration in the ridge and furrow geometry compared to the flat soil geometry.
Water movement, solute transport, ridge and furrow, flat field
1351-0754
Duncan, Simon, Jack
fa8481c1-3788-41a0-a304-02515b93ef7d
Daly, Keith
29920932-1779-4d08-81f8-bdd898191e5a
Sweeney, P
b7d778d9-0fcd-49aa-a0d9-a0ffc39b9418
Roose, Tiina
3581ab5b-71e1-4897-8d88-59f13f3bccfe
Duncan, Simon, Jack
fa8481c1-3788-41a0-a304-02515b93ef7d
Daly, Keith
29920932-1779-4d08-81f8-bdd898191e5a
Sweeney, P
b7d778d9-0fcd-49aa-a0d9-a0ffc39b9418
Roose, Tiina
3581ab5b-71e1-4897-8d88-59f13f3bccfe

Duncan, Simon, Jack, Daly, Keith, Sweeney, P and Roose, Tiina (2018) Mathematical modelling of water and solute movement in ridged versus flat planting systems. European Journal of Soil Science. (doi:10.1111/ejss.12711).

Record type: Article

Abstract

We compared water and solute movement between a ridge and furrow geometry and that of flat soil with a mathematical model. We focused on the effects of two physical processes: root water uptake and pond formation on the soil surface. The mathematical model describes the interaction between solute transport, water movement and surface pond depth. Numerical simulations were used to determine how solutes of varying mobility and rates of degradation penetrated into the two soil geometries over a growing season. Both the ridge and furrow or flat soil geometries could reduce solute leaching, but this depended on several factors. Rain immediately after a solute application was a key factor in determining solute penetration into soil. In cases with delayed rain after a solute application, solutes in ridge and furrow geometries collected adjacent to the root system, resulting in reduced solute penetration compared to the flat soil geometry. In contrast, substantial rain immediately after a solute application resulted in ponding where water infiltration acted as the dominant transport mechanism. This resulted in increased solute penetration in the ridge and furrow geometry compared to the flat soil geometry.

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EJSS-300-17-R3-final inc figures
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More information

Accepted/In Press date: 11 July 2018
e-pub ahead of print date: 13 July 2018
Keywords: Water movement, solute transport, ridge and furrow, flat field

Identifiers

Local EPrints ID: 422380
URI: http://eprints.soton.ac.uk/id/eprint/422380
ISSN: 1351-0754
PURE UUID: 178070e7-d878-4990-b2f9-adb492caba98
ORCID for Tiina Roose: ORCID iD orcid.org/0000-0001-8710-1063

Catalogue record

Date deposited: 23 Jul 2018 16:30
Last modified: 22 Nov 2021 06:34

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Contributors

Author: Simon, Jack Duncan
Author: Keith Daly
Author: P Sweeney
Author: Tiina Roose ORCID iD

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