Division of irrigation water in The Fayoum, Egypt

Wolters, W.; Ghobrial, Nadi Selim; Bos, M.

doi:10.1007/bf01139327

Cited by 6 publications

(3 citation statements)

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“…El Fayoum area is one of most important agricultural lands of Egypt for a long time due to good soil cover and high crop productivity, In addition to it has a beauty nature represented by natural springs, waterfalls and the great natural lake (Qaroun Lake). El Fayoum's water enters through two main gated intakes, one being the natural channel Bahr Youssef, the other Bahr Hassan Wasef a canal dug in 1905 (Wolters et al 1987). There are two main drains; The Bats in the east and the Wadi in the west.…”

Section: Introductionmentioning

confidence: 99%

Geochemical modeling and isotopic approach for delineating water resources evolution in El Fayoum depression, Egypt

2022

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In this study, an attempt was made to understand the hydrogeochemical processes controlling water resources (surface and groundwater) evolution in El Fayoum depression, Egypt. Hydrochemical, inverse geochemical modeling integrated with environmental isotopes was applied. Forty-three surface and groundwater samples were collected and analyzed for major chemistry (cations, anions) and environmental stable isotopes (δ18O, δD). The ionic sequence based on relative molar proportions for cations was Na+ > Ca2+ > Mg2+ > K+ and Na+ > Mg2+ > Ca2+ > K+ for surface and groundwater, respectively and for anions was HCO3− > Cl− > SO42− for all water samples. δ18O and δD relationship plot on a typical evaporation line, enhance potential evaporation of recharging water prior to infiltration. Saturation index estimation revealed that water resources were affected by carbonate and evaporites minerals dissolution and supersaturated with Goethite, Gibbsite and Barite minerals. Inverse geochemical modeling using PHREEQC was used to identify water resources evolution in the study area through two flow paths A, B. The inverse model was constrained so the primary mineral phase including calcite, Aragonite, Anhydrite and Gypsum with Carbon dioxide (gas) are constrained to dissolve until they reach saturation, Whereas H2(g), hydrogen sulphide (gas) and O2(g) are constrained to out gas in all models for flow path (A). For flow path (B), Dolomite, Anhydrite and Gypsum are tend to dissolve with carbon dioxide (gas), H2(g) and O2(g) gases tend to outgassed. Finally, two processes controlling water resource evolution; carbonate and evaporites dissolution and development of cation exchange process through the aquifer system.

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Section: Introductionmentioning

confidence: 99%

Geochemical modeling and isotopic approach for delineating water resources evolution in El Fayoum depression, Egypt

2022

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“…Although the overall irrigation efficiency in Fayoum is relatively high, the irrigation water is not uniformly divided over the area [26]. Measurements of discharges and the division of flow over Fayoum showed that the improvement of irrigation water management should begin upstream, at the system's main flow-division structures.…”

Section: Matching Irrigation Supply With Crop Demand Currently Impossmentioning

confidence: 99%

Issues and Challenges in Spatial and Temporal Water Allocation in the Nile Delta

et al. 2016

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"Egypt is a gift of the Nile," wrote Herodotus, and indeed, without the Nile there would be no Egypt as the world knows it. Egypt is mainly dependent on the flow in the Nile River (with an agreed share of 55.5 BCM) and it receives about 1.3 BCM rainfall annually (mainly along the north coast). The overall water use efficiency is already high, due to e.g., water scarcity and reuse of drainage water. Egypt's water resources are managed by the Ministry of Water Resources and Irrigation (MWRI), with agriculture as by far the largest user of irrigation water, with a share of about 85%. The purpose of the paper is to discuss the major issues and challenges in the spatial and temporal allocation of water, in relation to a free cropping pattern and the characteristics of the irrigation system. We conclude that the current world-wide call for "crop-demand-based precision irrigation supply" will not be easily attainable in Egypt. Instead, "water security" in the form of "guaranteed or agreed" water supply may be a preferred water allocation aim for various reasons, including lack of large storage possibilities, impossibility of fine-tuning supplies in the system, and the needed capacity to deal with (future) droughts. Although the paper concentrates on technical issues, it is increasingly realized that the challenges are not only of a technical nature and that there is a need for integration of policies as well as a need to establish effective science-business-policy interfaces at the national level.

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“…(ex, SHAACK, 1986;PAUDYAl et al, 1991;SNELL, 2001;GILLIES, 2010). A eficácia na captação de água é fundamental por permitir a otimização do uso dos volumes disponíveis, (WOLTERS et al, 1987;RIJO;PEREIRA, 1987;RENAULT, 1988;MURRAY-RUST;VANDER VELDE, 1994), se direcionam esforços para o monitoramento das vazões e melhoria nas suas partilhas (ex, BHUTTA; VAN DER VELDE, 1992;REPLOGLE 1997;KOUCHAKZADEH;MARASHI, 2005;WAHL et al, 2005).…”

Section: Tipologias De Canais Abertosunclassified

Assinaturas topográficas humanas (ATH´S) no contexto dos canais derivados multifuncionais e suas repercussões hidrogeomorfológicas

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Division of irrigation water in The Fayoum, Egypt

Cited by 6 publications

References 1 publication

Geochemical modeling and isotopic approach for delineating water resources evolution in El Fayoum depression, Egypt

Geochemical modeling and isotopic approach for delineating water resources evolution in El Fayoum depression, Egypt

Issues and Challenges in Spatial and Temporal Water Allocation in the Nile Delta

Assinaturas topográficas humanas (ATH´S) no contexto dos canais derivados multifuncionais e suas repercussões hidrogeomorfológicas

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