Évaluation ex ante de l’irrigation de complément dans un contexte sahélien: couplage d’un modèle biophysique à un modèle économique d’exploitation agricole

Bétéo Zongo, Abdoulaye Diarra, Bruno Barbier, Malicki Zorom, Harouna Karambiri, Souleymane Ouédraogo, Patrice Toé, Yacouba Hamma and Thomas Dogot
Additional contact information
Abdoulaye Diarra: Word Health Organization Country Office Gabon
Bruno Barbier: CIRED - Centre International de Recherche sur l'Environnement et le Développement - Cirad - Centre de Coopération Internationale en Recherche Agronomique pour le Développement - EHESS - École des hautes études en sciences sociales - AgroParisTech - ENPC - École nationale des ponts et chaussées - Université Paris-Saclay - CNRS - Centre National de la Recherche Scientifique, UMR G-EAU - Gestion de l'Eau, Acteurs, Usages - Cirad - Centre de Coopération Internationale en Recherche Agronomique pour le Développement - IRD - Institut de Recherche pour le Développement - AgroParisTech - IRSTEA - Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture - Montpellier SupAgro - Institut national d’études supérieures agronomiques de Montpellier
Malicki Zorom: 2iE - Institut international d'ingénierie de l'eau et de l'environnement
Harouna Karambiri: 2iE - International Institute for Water and Environmental Engineering [Ouagadougou]
Souleymane Ouédraogo: INERA - Institut de l'Environnement et Recherches Agricoles [Ouagadougou] - CNRST - Centre national de la recherche scientifique et technologique [Ouagadougou]
Yacouba Hamma: 2iE - Institut international d'ingénierie de l'eau et de l'environnement, LEAH - Laboratoire Hydrologie et Ressources en Eau (LEAH)
Thomas Dogot: [FUSAGx] - Gembloux Agro-Bio Tech [Faculté universitaire des sciences agronomiques de Gembloux] - ULiège - Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich

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Abstract: Ex ante evaluation of supplemental irrigation in a Sahelian context: coupling biophysical and economic models Description of the subject. In Sahelian countries, irregular spatial and temporal rainfall distribution remains a threat for rainfed agriculture despite the use of a wide range of techniques for soil conservation. Objectives. To analyze several irrigation strategies for rainfed crops and to assess the likely economic incentives to support the adoption of supplemental irrigation from farm ponds in response to dry spells. Method. The supplemental irrigation strategies and economic incentives were analyzed using an applied bio-economic model in a typical farm. Results. The simulations showed that supplemental irrigation from small individual ponds would increase farmers' income compared to the situation without irrigation. Maize, sorghum and millet production under supplemental irrigation in a dry year would increase expected income by 26.49% (133,030 CFA francs equivalent to 202.80 euros) compared to the situation without irrigation. Simulations with incentives to promote supplemental irrigation focused on four subsidy modalities and the introduction of a credit system for agricultural households. Conclusions. Of the incentives studied, the food-for-work subsidy to mobilize labor for basin building seems particularly suitable for scaling-up supplemental irrigation.

Date: 2019-09-02
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Published in Biotechnologie, Agronomie, Société et Environnement / Biotechnology, Agronomy, Society and Environment, 2019, 3, pp.174-187. ⟨10.25518/1780-4507.18056⟩

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Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:hal-04559886

DOI: 10.25518/1780-4507.18056

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