NDLI: A two-dimensional water balance model for micro-irrigated hedgerow tree crops

Content Provider	Springer Nature Link
Author	Annandale, J. G. Jovavic, N. Z. Campbell, G. S. Sautoy, N. Benadé, N.
Copyright Year	2003
Abstract	Distribution of water and energy is non-uniform in widely spaced, micro-irrigated, hedgerow crops. For accurate water use predictions, this two-dimensional variation in the energy and water balance must be adequately accounted for. To this end, a user-friendly, two-dimensional, mechanistic soil water balance model (SWB-2D), has been developed. Energy is partitioned at the surface depending on solar orientation, row direction and canopy size, shape and leaf area density. Water is assumed to be distributed uniformly at the surface in the case of rainfall, whilst micro-irrigation only wets a limited portion of the field. Crop water uptake is calculated as a function of evaporative demand, soil water potential and root density. Evaporation is also calculated as being either limited by available energy or by water supply. Water is redistributed in the soil in two dimensions with a finite difference solution to the Richards’ equation. A field trial was set up to test the 2-D soil water balance model in a citrus orchard at Syferkuil (Pietersburg, South Africa). Model predictions generally compared well to actual soil water content measured with time domain reflectometry probes. Scenario modelling and analyses were carried out by varying some input parameters (row orientation, canopy width, wetted diameter and fraction of roots in the wetted volume of soil) and observing variations in the output of the soil water balance. The model holds potential for improving irrigation scheduling and efficiency through increased understanding and accuracy in estimating soil water reserves, since it accounts for the differing conditions in the under-tree irrigated strip and inter-row rainfed areas.
Starting Page	157
Ending Page	170
Page Count	14
File Format	PDF
ISSN	03427188
Journal	Irrigation Science
Volume Number	22
Issue Number	3-4
e-ISSN	14321319
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-10-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science Water Science and Technology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Modeling the water transport and nitrogen dynamics in irrigated salad crops

Quantification of soil surface evaporation under micro-scale advection in drip-irrigated fields

Spatial and temporal variability of nitrate in irrigated salad crops

The soil water balance of rainfed and irrigated oats, Italian rye grass and rye using the CropSyst model

Evaluation of the Watermark sensor for use with drip irrigated vegetable crops

Soil water competition in a temperate hedgerow agroforestry system in South Africa

Evaluation of crop water stress index for LEPA irrigated corn

Water balance model for paddy fields under intermittent irrigation practices

Water needs and equivalence relations for different irrigated crops in the São Francisco basin

A two-dimensional water balance model for micro-irrigated hedgerow tree crops

Similar Documents

Modeling the water transport and nitrogen dynamics in irrigated salad crops

Quantification of soil surface evaporation under micro-scale advection in drip-irrigated fields

Spatial and temporal variability of nitrate in irrigated salad crops

The soil water balance of rainfed and irrigated oats, Italian rye grass and rye using the CropSyst model

Evaluation of the Watermark sensor for use with drip irrigated vegetable crops

Soil water competition in a temperate hedgerow agroforestry system in South Africa

Evaluation of crop water stress index for LEPA irrigated corn

Water balance model for paddy fields under intermittent irrigation practices

Water needs and equivalence relations for different irrigated crops in the São Francisco basin

A two-dimensional water balance model for micro-irrigated hedgerow tree crops