irrigation system 2019



Agricultural-to-hydropower water transfers: sharing water and benefits in hydropower- irrigation systems .
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This paper presents a methodology to assess agricultural-to-hydropower water transfers in water resources systems where irrigation crop production and hydropower generation are the main economic activities. In many countries, water for crop irrigation is often considered

Port-based modelling for open channel irrigation systems
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A port-based model for the water flow and level dynamics in open channel systems is derived. It is structured into dissipative and conservative sub- systems related through a symplectic geometric structure which expresses instantaneous power conservation. This

Performance measurement in farmermanaged irrigation systems
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Performance Measurement in Farmer-Managed Irrigation Systems Proceedings of an International Workshop of the Farmer-Managed Irrigation Systems Network Shaul Manor and Jorge Chambouleyron, editors IIMI 631.7.6.2 GOOO ERNATIONAL IRRIGATION MANAGEMENT INSTITUTE

Water use efficiency of wheat under drip irrigation systems at Al-Maghara area, North Sinai, Egypt
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A field experiment was conducted during 2004/2005 season in El-Maghara Research Station, about 90 Km South El-Arish city, North Sinai Governorate, Egypt to study water use efficiency of three wheat varieties (ie Sakha Giza 7 and Giza 69) as affected by four

Evaluation of uniformity coefficients for sprinkler irrigation systems under different field conditions in Kurdistan Province (northwest of Iran)
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In the past few decades, several coefficients of uniformity were developed to express the uniformity of water distribution for different sprinkler irrigation systems . Christiansens uniformity coefficient seems to be the most popular uniformity coefficient used by

Performance of some bean (Phaseolus vulgaris L.) varieties under different irrigation systems and regimes
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Two field experiments were carried out for the two successive growing seasons of 2004 and 2005 in a silt clay loam soil at the Experimental Farm of the Faculty of Agriculture, Ain Shams University, Qalubia Governorate, Egypt. The aim of this study was to investigate the effect of

Water productivity at different scales under canal, tank and well irrigation systems
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Generally speaking, the term water productivityrefers to the magnitude of output or benefit resulting from the input quantum of water as applied on a unit base. In the domain of agriculture, it is expressed as the net consumptive use efficiency in terms of yield per unit

Devolution of management in public irrigation systems : cost shedding, empowerment and performance
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This study is undertaken as part of a three-year Rural Resources and Poverty Research Programme fiinded by the British Overseas Development Administration. The programme focuses on the changing role of the state in natural resources management and the

Pneumatic valves for automation of irrigation systems
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Competition for water among domestic, industrial, recreational, and agricultural users in the Western United States is increasing at an alarming rate. Some authorities believe that irrigated agriculture, one of the low efficiency users of water, could be forced to yield part of

Maximizing water use efficiency in wheat yields based on drip irrigation systems
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Maximizing irrigation water use efficiency is one of the most important policies under arid ecosystems conditions. Therefore, the aim of this study was to estimate the wheat yield response to drip irrigation systems and the attributed water use efficiency and saving water

Evaluation of soil moisture sensors under intelligent irrigation systems for economical crops in arid regions
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Problem statement: In irrigation water management, irrigation water use represents a substantial opportunity for agriculture water savings. Automation of irrigation systems , based on Soil Moisture Sensors Systems (SMSS) has the potential to provide maximum water use

Water for food: corruption in irrigation systems
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The vast majority of the worlds farmers still rely on rainfall to grow their crops. In some parts of the world almost all rain falls within such a short period of time that it is either impossible or very risky to try to farm on rainfall only. In large parts of South Asias monsoon region

Evaluation of crop water stress index (CWSI) for eggplant under varying irrigation regimes using surface and subsurface drip systems
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The main objective of this research is to evaluate crop water stress index (CWSI) on eggplant under various irrigation regimes applied with subsurface and surface drip systems in the Eastern Mediterranean Region of Turkey. The field experiments were carried out

Influence of some irrigation systems and water regimes on growth and yield of sesame plants
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Two field experiments were carried out at the Agricultural Experimental Station of National Research Centre at Shalakan, Kalubia Governorate during 2000 and 2001 seasons to study the effect of some irrigation systems ie controlled surface irrigation , sub-surface drip

Paddy field irrigation systems in Myanmar
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Agricultural development is given priority in Myanmars socio-economic development as it is seen as essential in its own right and as the basis of the other sectors of the economy. The agriculture sector contributes 43 percent of GDP; 41 percent of export earnings; and

Property rights and maintenance of irrigation systems
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Property rights play a central role in the management of resources, conveying authority and shaping the incentives of both users and system managers. This has been widely accepted in both research and policy-making in the case of land, and there is growing consensus

Center pivot irrigation systems .
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The use of 8-or 10-inch mainlines allows the system to operate at lower pressure and saves thousands of dollars in reduced pumping cost during the usable life of the system. Table 1 shows approximate pressure loss differences for available mainline sizes. System pressure

Filtration, treatment, and maintenance considerations for micro- irrigation systems
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Micro- irrigation systems can deliver water and nutri- ents in precise amounts and at controlled frequencies directly to the plants root zone. With micro- irrigation systems , an extensive network of pipe is used to distrib- ute water to emitters that discharge it in droplets, small streams, or through

Crop production comparison under various irrigation systems
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Studies on crop productivity for major irrigated crops in the Great Plains were reviewed for different types of modern pressurized irrigation systems . Crops included corn, cotton, grain sorghum, winter wheat, and preliminary data on soybean and sunflower. Irrigation systems

Strawberry response to fumigants applied by drip irrigation systems
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Methods The fumigants were applied in October to field plots located near Salinas (USDA- ARS Spence Farm) and Watsonville (Monterey Bay Academy), California, through 2 drip lines in the 32 wide beds. The Salinas site had not been fumigated or planted to




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