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Irrigation and Drainage Systems Engineering
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The article considers the flow efficiency and operational reliability of large canals. In order to raise efficiency and reliability of exploitation of canals hydraulic control model to change the flow depth was created. It was determined by the law of water transmission in optional time. Patterns based on determination of hydraulic relations under changing values of hydraulic parameters of water flow in the trapezoid cross-section irrigation canal were examined.
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Irrigation would provide farmers with sustained livelihoods and improve their general well-being. The aim of this study was to evaluate the suitability of the land for surface irrigation using GIS based weighted overlay analysis of individual parameters for better utilization of land resources. Factors considered included physical land features (land use/land cover, soil and slope), and proximity to water sources. Based on soil depth, 82.4% of the study area is potential suitable for the intende...
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This report tried to address why Ethiopia is suffered from low agricultural production blessed with high potential of irrigation water resource, irrigable land, labor and suitable climate and why Israel is very effective in irrigated agriculture by having very low arable land, water resource, and with adverse climatic condition. What lessons should Ethiopia share from Israel in irrigated agriculture to improve the economic and social development of Ethiopia? Various research papers were reviewed...
This study conducted to evaluate the performance of Sanko small-scale irrigation scheme at Basketo Special Woreda, South Nation Nationalities Peoples Regional states. The irrigation scheme includes command area of 120 ha and 600 beneficiaries. The scheme was evaluated using internal and productivity performance indicators. From the analyses of the internal performance indicators, the conveyance efficiency of the main canal was found to be 69.3% and application efficiencies at head (61.6%), middl...
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Low availability of surface water has exacerbated the use of groundwater for irrigation in New Mexico. About 75% of the groundwater in NM is brackish and prolonged application without treatment could increase soil salinity. Reverse Osmosis (RO) treats brackish groundwater but disposal or reuse of RO concentrate is a problem. The objective of this study was to test germination and emergence of six halophyte species under a water salinity gradient. Four irrigation water treatments were tap water (...
This is the third manuscript of a three-part paper that presents the development and evaluation of a hydraulic simulation model for linear-move laterals equipped with pressure reducing valve (prvs). System description, model assumptions, and specification of the lateral hydraulic simulation problem are discussed in part-one of the paper. Formulation and numerical solution of the lateral hydraulic simulation problem are described in manuscript-two. Results of model evaluation and simulation examp...
The primary objective of this study was to assess the land resources potential of the Shaya River sub-basin in the Bale Zone of Oromia for irrigation and providing a geo-referenced map of these resources. Watershed delineation, identification of irrigable land, and estimation of surface runoff and irrigation water requirements were the steps followed. Irrigation suitability factors such as slope, texture, depth, drainage characteristics, land use/cover and distance to water source were taken in ...
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Agricultural water is scarce in many parts of the world and becoming a global agenda. It is the largest among sectors which are consuming huge fresh water. This experiment was carried out for three years to investigate the yield and water productivity of onion under different deficit irrigation levels. The method used was field experiment contains combination of five treatments (100% ETc throughout the season, 85% of ETc throughout the season, 70% of ETc throughout the season, 50% of ETc through...
A field experiment was undertaken from 2015 to 2017 G.C., during Gana (from August to December) cropping season to study the effects of in situ moisture conservation and management on yield and yield components of improved maize variety (Melkasa II) at lowland of Bale (Goro and Ginnir districts), southeastern Ethiopian. The experimental design was randomized complete block design (RCBD) using three treatments (flat bed, ridging and furrow with ties, and ridging and furrow without ties (open furr...
An equation that expresses lateral pressure as an explicit function of distance from the lateral inlet is derived for linear-move sprinkler irrigation systems. The equation takes into account the effects of both field slope and span geometry on lateral pressure. The proposed equation is not intended for predictive use. Instead, it is used here in an additional evaluation of the validity of the unique pressure profile variability patterns, of linear-move laterals, produced in an earlier study thr...
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Top fields of study
Irrigation management
Water resources
Hydrology
Environmental science
Irrigation