Sustainability of irrigated farming systems in a Tunisian region: A recursive stochastic programming analysis

Belhouchette, Hatem and Blanco Fonseca, Maria and Wery, J. and Flichman, Guillermo (2012). Sustainability of irrigated farming systems in a Tunisian region: A recursive stochastic programming analysis. "Computers And Electronics in Agriculture", v. 86 ; pp. 100-110. ISSN 0168-1699. https://doi.org/10.1016/j.compag.2012.02.016.

Description

Title: Sustainability of irrigated farming systems in a Tunisian region: A recursive stochastic programming analysis
Author/s:
  • Belhouchette, Hatem
  • Blanco Fonseca, Maria
  • Wery, J.
  • Flichman, Guillermo
Item Type: Article
Título de Revista/Publicación: Computers And Electronics in Agriculture
Date: August 2012
ISSN: 0168-1699
Volume: 86
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Economía y Ciencias Sociales Agrarias [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The aim of this study was to evaluate the sustainability of farm irrigation systems in the Cébalat district in northern Tunisia. It addressed the challenging topic of sustainable agriculture through a bio-economic approach linking a biophysical model to an economic optimisation model. A crop growth simulation model (CropSyst) was used to build a database to determine the relationships between agricultural practices, crop yields and environmental effects (salt accumulation in soil and leaching of nitrates) in a context of high climatic variability. The database was then fed into a recursive stochastic model set for a 10-year plan that allowed analysing the effects of cropping patterns on farm income, salt accumulation and nitrate leaching. We assumed that the long-term sustainability of soil productivity might be in conflict with farm profitability in the short-term. Assuming a discount rate of 10% (for the base scenario), the model closely reproduced the current system and allowed to predict the degradation of soil quality due to long-term salt accumulation. The results showed that there was more accumulation of salt in the soil for the base scenario than for the alternative scenario (discount rate of 0%). This result was induced by applying a higher quantity of water per hectare for the alternative as compared to a base scenario. The results also showed that nitrogen leaching is very low for the two discount rates and all climate scenarios. In conclusion, the results show that the difference in farm income between the alternative and base scenarios increases over time to attain 45% after 10 years.

More information

Item ID: 15750
DC Identifier: http://oa.upm.es/15750/
OAI Identifier: oai:oa.upm.es:15750
DOI: 10.1016/j.compag.2012.02.016
Official URL: http://www.sciencedirect.com/science/article/pii/S0168169912000567
Deposited by: Memoria Investigacion
Deposited on: 17 Jun 2013 12:38
Last Modified: 21 Apr 2016 16:02
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