Your search found 15 records
1 Ragab, R.. 1996. Constraints and applicability of irrigation scheduling under limited water resources, variable rainfall and saline conditions. In International Commission on Irrigation and Drainage (ICID); FAO. Irrigation scheduling: from theory to practice. Proceedings of the ICID/FAO Workshop on Irrigation Scheduling, Rome, Italy, 12-13 September 1995. Rome, Italy: FAO. pp.149-166. (FAO Water Reports 8)
Irrigation scheduling ; Constraints ; Salinity ; Rain ; Evapotranspiration ; Water stress ; Irrigation management
(Location: IWMI HQ Call no: 631.7.1 G000 FAO Record No: H017899)
2 Ragab, R.; El-Quosy, D. E. D.; van den Broek, B.; Pereira, L. S. (Eds.) 1996. Crop-water-environment models: Selected papers to the workshop organized by the ICID Working Group on "Sustainable Crops and Water Use" at the occasion of the 16th Congress of the International Commission on Irrigation and Drainage at Cairo, Egypt. Cairo, Egypt: ICID. Egypt National Committee. v, 301p.
Simulation models ; GIS ; Linear programming ; Calibrations ; Irrigation management ; Irrigation scheduling ; Irrigation practices ; Irrigation water ; Irrigation requirements ; Crop yield ; Maize ; Water requirements ; Water use ; Drainage ; Groundwater ; Salinity ; Waterlogging ; Water balance ; Arid zones ; Nitrogen ; Pesticide residues ; Leaching ; Soil properties ; Soil moisture ; Soil salinity ; Soil water relations ; Lysimetry ; Water distribution
(Location: IWMI-HQ Call no: 631.7.1 G000 RAG Record No: H019361)
3 Ragab, R; Pearce, G. (Eds.) 1998. Proceedings of the International Workshop on the Use of Saline and Brackish Water for Irrigation - Implications for the Management of Irrigation, Drainage and Crops, Bali, Indonesia, 23-24 July 1998. Jakarta, Indonesia: Indonesian National ICID Committee (INACID) iii, 338p.
Irrigation efficiency ; Drainage ; Models ; Crop production ; Irrigation water ; Water quality ; Soil reclamation ; Soil properties ; Cotton ; Reservoirs ; Wheat ; Soil salinity ; Sodic soils ; Sprinkler irrigation ; Groundwater ; Communal irrigation systems ; Effluents ; Waterlogging ; Horticulture ; Eucalyptus ; Food production ; Water conservation ; Soil degradation ; Environmental effects ; Water pollution ; Leaching ; Case studies / Cyprus / Spain / Iran / Southern Africa / Yugoslavia / India / Palestine / Tunisia / Kazakhstan / China / Israel / Pakistan / Rajad Project / Jiangsu Province / Khuzistan Province
(Location: IWMI-HQ Call no: ICID 631.7 G000 RAG Record No: H022866)
The 49th International Executive Council Meeting and 10th ICID Afro-Asian Regional Conference, Bali, Indonesia, organized by ICID. Cosponsored by IPTRID, FAO, CIGR (International Commission on Agricultural Engineering) and Eur Agr Eng Special Interest Group on Soil and Water.
4 Ragab, R.. 1998. The use of saline / brackish water for irrigation: Possibilities and constraints. In Ragab, R; Pearce, G. (Eds.), Proceedings of the International Workshop on the Use of Saline and Brackish Water for Irrigation - Implications for the Management of Irrigation, Drainage and Crops, Bali, Indonesia, 23-24 July 1998. Jakarta, Indonesia: Indonesian National ICID Committee (INACID) pp.12-41.
Irrigation water ; Water quality ; Salinity ; Drainage ; Water reuse ; Constraints ; Mathematical models ; Leaching ; Drip irrigation ; Sprinkler irrigation ; Irrigation scheduling ; Irrigation practices / USA / Israel
(Location: IWMI-HQ Call no: ICID 631.7 G000 RAG Record No: H022868)
5 Ragab, R.; Pearce, G.; Kim, J. C.; Nairizi, S.; Hamdy, A. (Eds.) 2001. 52nd IEC Meeting of the International Commission on Irrigation and Drainage - International Workshop on Wastewater Reuse Management, Seoul, Korea, 19-20 September 2001. Seoul, Korea: International Commission on Irrigation and Drinage (ICID), Korean National Committee on Irrigation and Drainage (KCID). vii, 229p.
Wastewater ; Water quality ; Water reuse ; Recycling ; Irrigation water ; Crop production ; Fertilizers ; Pollution control ; Wetlands ; Nitrogen ; Case studies ; Rice ; Soil properties ; Legislation / China / India / Egypt / Pakistan / Morocco / Korea Republic / Iran / Palestine / Uganda
(Location: IWMI-HQ Call no: ICID 631.7.5 G000 RAG Record No: H029339)
6 El-Sadek, A.; Feyen, J.; Ragab, R.. 2002. Simulation of nitrogen balance of maize field under different drainage strategies using the Drainmod-N model. Irrigation and Drainage, 51(1):61-75.
Subsurface drainage ; Simulation models ; Nitrogen ; Leaching ; Groundwater ; Drains ; Design ; Maize ; Soil properties
(Location: IWMI-HQ Call no: PER Record No: H029955)
7 Hamdy, A.; Ragab, R.; Scarascia-Mugnozza, E. S. 2003. Coping with water scarcity: Water saving and increasing water productivity. Irrigation and Drainage, 52(1):3-20.
Water scarcity ; Water conservation ; Water use ; Food production ; Irrigation water ; Water resource management ; Irrigated farming ; Water reuse ; Wastewater ; Recycling ; Salinity ; Groundwater ; Surface irrigation ; Conjunctive use ; Productivity
(Location: IWMI-HQ Call no: PER Record No: H031257)
8 Ragab, R.. 2004. A holistic generic integrated approach for irrigation, crop and field management: The Saltmed model. In Taha, F. K.; Ismail, S.; Jaradat, A. (Eds.), Prospects of saline agriculture in the Arabian Peninsula: Proceedings of the International Symposium on “Prospects of Saline Agriculture in the GCC Countries.” Amherst, MA, USA: Amherst Scientific Publishers. pp.309-340.
Computer models ; Soil salinity ; Water quality ; Irrigation management ; Irrigated farming ; Evapotranspiration ; Leaching
(Location: IWMI-HQ Call no: 631.7.5 GG10 TAH Record No: H035638)
9 Flowers, T. J.; Ragab, R.; Malash, N.; Abdel Gawad, G.; Cuartero, J.; Arslan, A. 2005. Sustainable strategies for irrigation in salt-prone Mediterranean: SALTMED. Agricultural Water Management, 78(1-2):3-14.
Drip irrigation ; Furrow irrigation ; Tomatoes ; Salinity ; Water use efficiency ; Evapotranspiration ; Mathematical models / Egypt / Syria / Mediterranean Region
(Location: IWMI-HQ Call no: PER Record No: H037689)
10 Malash, N.; Flowers, T. J.; Ragab, R.. 2005. Effect of irrigation systems and water management practices using saline and non-saline water on tomato production. Agricultural Water Management, 78(1-2):25-38.
Irrigation effects ; Tomatoes ; Water quality ; Salinity ; Drip irrigation ; Furrow irrigation / Egypt / Nile Delta
(Location: IWMI-HQ Call no: PER Record No: H037691)
11 Ragab, R.; Malash, N.; Abdel Gawad, G.; Arslan, A.; Ghaibeh, A. 2005. A holistic generic integrated approach for irrigation, crop and field management: 1. The SALTMED model and its calibration using field data from Egypt and Syria. Agricultural Water Management, 78(1-2):67-88.
Tomatoes ; Salinity ; Water use efficiency ; Evapotranspiration ; Mathematical models ; Calibration ; Soil moisture ; Drip irrigation / Egypt / Syria
(Location: IWMI-HQ Call no: PER Record No: H037694)
12 Ragab, R.; Malash, N.; Abdel Gawad, G.; Arslan, A.; Ghaibeh, A. 2005. A holistic generic integrated approach for irrigation, crop and field management: 2. The SALTMED model validation using field data of five growing seasons from Egypt and Syria Agricultural Water Management, 78(1-2):89-107.
Tomatoes ; Salinity ; Evapotranspiration ; Mathematical models ; Calibration ; Soil water ; Drip irrigation ; Furrow irrigation / Egypt / Syria
(Location: IWMI-HQ Call no: PER Record No: H037695)
13 Afzal, M.; Battilani, A.; Solimando, D.; Ragab, R.. 2016. Improving water resources management using different irrigation strategies and water qualities: field and modelling study. Agricultural Water Management, 176:40-54. [doi: https://doi.org/10.1016/j.agwat.2016.05.005]
Water resources ; Water management ; Water quality ; Irrigation methods ; Strategies ; Models ; Calibration ; Water deficit ; Freshwater ; Water productivity ; Wastewater irrigation ; Crop yield ; Maize ; Potatoes ; Soil moisture ; Soil salinity ; Rain ; Dry matter / Italy / Bologna
(Location: IWMI HQ Call no: e-copy only Record No: H047557)
(3.87 MB)
The aim of this study was to investigate the effects of two different irrigation strategies, regulated deficit irrigation, RDI and partial root drying, PRD using surface freshwater (SW) and brackish treated waste water (TWW) for maize and potato crops. The SALTMED model has been applied using the field measurements of two cropping seasons 2013 and 2014 at the Canale Emiliano Romagnolo, CER’s experimental farm located in Mezzolara di Budrio (Bologna, Italy). In 2013, PRD irrigated potato received 17% less irrigation water than RDI but produced nearly the same yield as under RDI. The water productivity, on average, was 11% higher for PRD compared with RDI. For maize 2014 season, the PRD strategy received almost 15% less irrigation water, but produced a yield only 6% lower than that of RDI and gave equal water productivity to RDI. Given that the two strategies received the same amount of rainfall the results favour the PRD over RDI. Had the site not received above average rainfall (258 mm in 2013 and 259 mm during the 2014 growing seasons), PRD might have produced higher yield and water productivity than RDI. In terms of model simulations, overall, the model showed a strong relationship between the observed and the simulated soil moisture and salinity profiles, total dry mater and final yields. This illustrates SALTMED model’s ability to simulate the dry matter and yield of C3 and C4 crops as well as to simulate different water qualities and different water application strategies. Therefore, the model can run with “what if” scenarios depicting several water qualities, crops and irrigation systems and strategies without the need to try them all in the field. This will reduce costs of labour and investment.
14 Beekma, J.; Bird, J.; Mersha, A. N.; Reinhard, S.; Prathapar, S. A.; Rasul, G.; Richey, J.; Van Campen, J.; Ragab, R.; Perry, C.; Mohtar, R.; Tollefson, L.; Tian, F. 2021. Enabling policy environment for water, food and energy security. Irrigation and Drainage, 18p. (Online first) [doi: https://doi.org/10.1002/ird.2560]
Water security ; Food security ; Energy consumption ; Nexus ; Policies ; Water supply ; Water productivity ; Groundwater ; Water use ; Agriculture ; Greenhouses ; Solar energy ; Technology ; Innovation ; Socioeconomic development ; Sustainable development ; Governance ; Markets ; Models
(Location: IWMI HQ Call no: e-copy only Record No: H050156)
(1.35 MB)
The complexity of water, food and energy security is analysed from the perspectives of (i) water and food and (ii) water and energy and their interconnectivity and focuses ultimately on water as a primary input into processes, the entry point for participants of the Third World Irrigation Forum.
The paper provides an overview of trends in water, food and energy security, highlights the interconnectivity between the various elements and introduces the water–food–energy nexus as a tool for improving productivity and sector policies, avoiding unintended consequences on other sectors. Invariably, there will be trade-offs and the challenge is to find combinations of measures that have a net positive outcome. In order to quantify security in the three elements and the trade-offs between them, emerging modelling approaches for the nexus are discussed.
Sub-theme 3 of the forum focuses on productivity and technology interventions1 and sub-theme 2 on stakeholder interaction. The combination of modelling, technology innovations and stakeholder participation in a water–food–energy nexus approach leads to better understanding of linkages and more robust policies and is used to derive recommendations for an enabling policy environment.
The paper provides an overview of trends in water, food and energy security, highlights the interconnectivity between the various elements and introduces the water–food–energy nexus as a tool for improving productivity and sector policies, avoiding unintended consequences on other sectors. Invariably, there will be trade-offs and the challenge is to find combinations of measures that have a net positive outcome. In order to quantify security in the three elements and the trade-offs between them, emerging modelling approaches for the nexus are discussed.
Sub-theme 3 of the forum focuses on productivity and technology interventions1 and sub-theme 2 on stakeholder interaction. The combination of modelling, technology innovations and stakeholder participation in a water–food–energy nexus approach leads to better understanding of linkages and more robust policies and is used to derive recommendations for an enabling policy environment.
15 Wable, P. S.; Garg, K. K.; Nune, R; Venkataradha, A.; Anantha, K. H.; Srinivasan, V.; Ragab, R.; Rowan, J.; Keller, V.; Majumdar, P.; Rees, G.; Singh, R.; Dixit, S. 2022. Impact of agricultural water management interventions on upstream-downstream trade-offs in the Upper Cauvery Catchment, southern India: a modelling study. Irrigation and Drainage, 71(2):472-494. [doi: https://doi.org/10.1002/ird.2662]
Agriculture ; Water management ; Catchment areas ; Upstream ; Downstream ; Water balance ; Water reservoirs ; Runoff ; Land use ; Land cover ; Groundwater ; Water storage ; Rain ; Models / India / Karnataka / Upper Cauvery Catchment
(Location: IWMI HQ Call no: e-copy only Record No: H051055)
(89.40 MB)
The Cauvery basin in southern India is experiencing transboundary issues due to increasing water demand. This study analysed water balance components and the impact of agricultural water management (AWM) interventions in the upper Cauvery catchment of the Cauvery basin. Results showed that the study catchment receives an average of 1280 mm of annual rainfall. Of this, 29% (370 mm) flows downstream, 54% (700 mm) contributes to evapotranspiration (ET) and 17% (215 mm) contributes to groundwater recharge and surface storage. Rainfall varies from 700 to 5400 mm and the Western Ghats (mountain pass) are the main source of freshwater generation. The estimated ET in different catchments ranged from 500 to 900 mm per annum. An increase in the allocation of fresh water supplied by all three reservoirs (Hemavathi, Harangi and KRS) was observed in the canal command areas, from 1450 million cubic metres (MCM) yr ¹ in 1971–1980 to 3800 MCM yr ¹ in 2001–2010. AWM interventions harvested 140–160 MCM (13–20 mm) of surface runoff upstream of the upper Cauvery and reduced inflow into the Krishnaraja Sagar reservoir by 2–6%. The study findings are useful for designing and planning suitable water management interventions at basin scale.
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