Impacto de estratégias de gestão dos recursos hidricos sobre a disponibilidade da agua para usos multiplos numa bacia hidrografica semi-arida
In the semi-arid crystalline area of Ceará, the exploitation of alluvial aquifers for irrigation and domestic supply to rural communities over the last 10 years has upset the traditional mechanisms of water resources management. In the Forquilha watershed (Quixeramobim-CE), the main water resources are reservoirs (1 to 7 hm3), and an alluvial aquifer (2.3 hm3). From 1998 to 2006, pumping of alluvial groundwater for irrigation supply increased from ~0 to 0,7 hm³/year, and the fraction of population supplied through domestic water networks, using reservoirs and the aquifer, increased from 1% to 70%. Physical and socioeconomic issues were used 1) to characterize the system, 2) to build future scenarios of water resources exploitation, and 3) to build hydrological balance models in order to simulate the different impacts on water resource availability and salinity. Simulation results showed that, releases from the upstream main reservoir are necessary to keep reservoir salinity below 0.7 g/L and for guaranteeing domestic needs in the whole watershed. Moreover, the simulations showed that the area of irrigated fields cannot increase beyond the current extent (75 ha) without serious problems with water availability and salinity in the whole watershed. Otherwise, important socioeconomic problems are expected.
Main Authors: | Burte, Julien, Jamin, Jean-Yves, Coudrain, Anne, Frischkorn, Horst, Rodrigues, Eduardo S.P.M. |
---|---|
Format: | conference_item biblioteca |
Language: | por |
Published: |
s.n.
|
Subjects: | P10 - Ressources en eau et leur gestion, gestion des eaux, http://aims.fao.org/aos/agrovoc/c_8320, http://aims.fao.org/aos/agrovoc/c_1401, |
Online Access: | http://agritrop.cirad.fr/547779/ http://agritrop.cirad.fr/547779/1/document_547779.pdf |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Simulations of multipurpose water availability in a semi-arid catchment under different management strategies
by: Burte, Julien, et al. -
Quelques commentaires sur le compte-rendu du séminaire "Aménagements hydro-agricoles" organisé par le GRET et le Ministère de la Coopération. Montpellier - 4 au 8 septembre 1989
by: Le Gal, Pierre-Yves -
Quels sont les conflits multi-usages de l'eau dans les pays émergents ?
by: Ducrot, Raphaèle, et al. -
Comment partager savoirs et points de vue pour une gestion collective de l'eau ?
by: Ducrot, Raphaèle, et al. -
How to finance multiple use water systems for the rural poor? : Lessons learnt from the domestic water sector in the Olifants River Basin, South Africa
by: Lefebvre, Marie, et al.