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Digital Library of the
European Council for Modelling and Simulation |
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Title: |
Simulation
Of Water Use Efficiency To Tackle The Drought |
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Authors: |
Asha Karunaratne, Neil Crout |
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Published in:
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(2010).ECMS
2010 Proceedings edited by A Bargiela S A Ali D Crowley
E J H Kerckhoffs. European Council for Modeling and
Simulation. doi:10.7148/2010 ISBN:
978-0-9564944-1-2 24th
European Conference on Modelling and Simulation, Simulation Meets Global Challenges Kuala
Lumpur, June 1-4 2010 |
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Citation
format: |
Karunaratne, A., Crout,
N., & Azam-Ali, S. (2010). Simulation Of Water
Use Efficiency To Tackle The Drought. ECMS 2010 Proceedings edited by A Bargiela S A Ali D Crowley E J H Kerckhoffs
(pp. 316-322). European Council for Modeling and Simulation. doi:10.7148/2010-0316-0322 |
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DOI: |
http://dx.doi.org/10.7148/2010-0316-0322 |
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Abstract: |
Rainfed environments are
characterized by unpredictable and highly variable seasonal rainfall and hence
highly variable yields. Water use efficiency (WUE, yield per unit of water
use) is commonly used for agricultural production with limited water
resources. Expertise working towards the water resources need to address the
multitudinous aspects in which cropping systems and amounts, timing and
methods of irrigation, and fertilizer applications may be changed to improve WUE
while maintaining yield and harvest quality goals. Since experimentation
cannot address all scenarios accurate simulation models may fill in the gaps.
Crop simulation models are used widely to predict crop growth and development
in studies of the impact on climatic change. The present paper explains the model or WUE
for an underutilised crop, bambara
groundnut under drought as a sub-module of BAMGRO main model (Karunaratne, 2009). This quantitative model explains the root
growth, root distribution and water uptake on daily basis under variable
climatic conditions. The model links the size and distribution of root system
to the capture of water over the growing period. The model was calibrated
using glasshouse experimental data, Nottingham, UK and published information.
It was validated against 2 years of independent data sets (2007, 2008) from
Nottingham and field site at Notwane, Botswana.
Although the limited information on root growth is available, validation of
soil moisture against glass house and field reported satisfactory results. |
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