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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/9242
Title: Soil moisture flow modeling with water uptake by plants (wheat) under varying soil and moisture conditions
Authors: Yadav, Brijesh K.
Mathur S.
Siebel M.A.
Published in: Journal of Irrigation and Drainage Engineering
Abstract: A variably saturated soil moisture flow model is developed for planted soils with depth varying properties by incorporating a nonuniform macroscopic root water uptake function. The model includes spatial and temporal variation of the root density with dynamic root growth for simulating water uptake by plants along with the impact of soil moisture availability. The governing partial differential moisture flow equation integrated over the depth with a plant water uptake term is solved numerically by the implicit finite difference method using an iterative scheme. The model is first tested for barren soils for two profiles considering constant and depth varying soil characteristics under constant inflow condition. The results obtained are later tested with experimental data available in the literature. A nonuniform plant water uptake term is subsequently incorporated in the model and water uptake by wheat plants under different soil moisture availability conditions is studied. Finally, the moisture flow model is validated with field data of rain fed wheat (Triticum aestivum) using a dynamic root growth model for a layered root zone soil profile. The simulated soil moisture regime of the layered root zone shows a reasonably good agreement with the observed data. © 2009 ASCE.
Citation: Journal of Irrigation and Drainage Engineering (2009), 135(3): 375-381
URI: https://doi.org/10.1061/(ASCE)IR.1943-4774.0000068
http://repository.iitr.ac.in/handle/123456789/9242
Issue Date: 2009
Keywords: Crops
Layered soils
Numerical models
Soil water
ISSN: 7339437
Author Scopus IDs: 57209494362
55434325100
6604081434
Author Affiliations: Yadav, B.K., Dept. of Environmental Resources, UNESCO-IHE Institute for Water Education, Westvest 7, 2601 DA Delft, Netherlands
Mathur, S., Dept. of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 11016, India
Siebel, M.A., Dept. of Environmental Resources, UNESCO-IHE Institute for Water Education, Westvest 7, 2601 DA Delft, Netherlands
Corresponding Author: Yadav, B.K.; Dept. of Environmental Resources, UNESCO-IHE Institute for Water Education, Westvest 7, 2601 DA Delft, Netherlands; email: Yadav;brijeshy@gmail.com
Appears in Collections:Journal Publications [HY]

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