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UKAID Department for International Development (R4D) 1998

Integrated irrigation and drainage to save water (Egypt)

Irrigation Drainage Egypt

UKAID Department for International Development (R4D)

Titre : Integrated irrigation and drainage to save water (Egypt)

Pays : Egypte

Projet de recherche pour le Développement : R7133

DFID Programme : Water

Organismes de mise en œuvre
Joint Financiers : Drainage Research Institute, Ministry of Water Resources and Irrigation, Egypt
Lead Institutes : HR Wallingford Group Ltd
Managing Institutes : HR Wallingford Group Ltd
Collaborating Institutes : Drainage Research Institute, Ministry of Water Resources and Irrigation, Egypt

Durée : Start Date : 01-10-1998 End Date : 30-03-2001

Objectifs  : Integrated water management to save water through the introduction of controlled drainage. Simulation modelling and optimisation techniques used to develop practical methods to optimise water saving, crop yield and pollutant removal.

Descriptif
Recent modelling simulations in the USA indicate that significant savings of water (20% without loss in crop yield) can be made under surface irrigation if drains are periodically blocked as part of an integrated irrigation and drainage strategy (Manguerra and Garcia, 1997). With this controlled drainage, more of the applied water is stored in the soil profile for longer periods, maximising crop utilisation. Irrigation applications are managed to optimise use of shallow groundwater resources. Another benefit is the increased protection this method affords to the groundwater (Wenberg, 1993), as harmful solutes are removed more efficiently by leaching processes. Controlled drainage is not entirely new. In low-lying riverine areas of Poland, water management strategies incorporating controlled drainage are used to create optimum soil moisture conditions under rainfed grasslands (Brandyk et al, 1993). Modelling studies have simulated the depth to watertable and subsequent crop water uptake under different controlled drainage strategies, but the methodology has not been explored as a water-saving technique or as a means of protecting groundwater resources. DRAINMOD is a state-of-the-art drainage simulation model developed over many years (Skaggs 1978) primarily for humid regions of North America. It uses a waterbalance approach to evaluate different irrigation and drainage management options, prmarily focussing on watertable management to optimise soil moisture conditions in the crop rootzone. Application in semi-arid regions (Gupta et al, 1993) has been limited so far, and has not been focussed on water-saving or resource protection benefits. Current global population growth rates require an increase in agricultural food production of about 40-50% over the next thirty to forty years, in order to maintain present levels of food intake (World Bank, 1988). To meet the target, irrigated agriculture must play a vital role, in fact the FAO estimates that 60% of future gains will have to come from irrigation. For this to happen two major constraints must be overcome - irrigated agriculture must use water more efficiently, and quality of water resources must be maintained. The potential of controlled drainage to address these issues has been recognised but not developed. The annual report of the Egyptian Drainage Research Institute to the Advisory Panel on Land Drainage in Egypt has identified controlled drainage as the number one research issue for its current five year work plan, 1997-2002. The relation of the proposed project to this action is clear

Total Cost to DFID : £163,213

Présentation : UKAID

Page publiée le 25 novembre 2015, mise à jour le 26 octobre 2017