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| dc.contributor.author | Nigussie, Genzeb | |
| dc.date.accessioned | 2020-03-19T09:01:25Z | |
| dc.date.available | 2020-03-19T09:01:25Z | |
| dc.date.issued | 2020-03-19 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/10712 | |
| dc.description.abstract | Food security can be achieved through irrigation development; the efficiency of irrigation scheme is highly depending on physical, technological and environmental factors. This study was initiated to evaluate the performance of Gomit small-scale irrigation scheme using internal performance indices such as conveyance efficiency, application efficiency, storage efficiency deep percolation fraction, water delivery performance and maintenance indicators, so as to recommend appropriate measures to improve the scheme management and performance. Primary data were collected using: field observation, interviewing beneficiary farmers, discharge measurements in the canals, determination of moisture contents of the soil before and after irrigation, determination of soil physical properties and measurement of depth of water applied to the fields. In addition to primary data, secondary data were collected from the secondary sources. The results show that, the main canal conveyance efficiency was 81.6%, the average conveyance efficiency of the secondary canal was 60.51%.The conveyance efficiency of the canals was found to be very low when compared to accepted standards. The application efficiency result on three farmers’ farm located on head, middle and tail of the command were 45.09%, 41.13% and 39.03%, respectively. These values were also found to be below the recommended value (60%). The water delivery performance was only 22 percent showing a very substantial reduction from the design of the canal capacity. Maintenance indicators; effectiveness of infrastructure and sustainability of irrigated area were found to be 23.25% and 41.4%, respectively. These values indicate that, actual command area was reduced from initially designed, and a number of structures initially installed were becoming nonfunctional.Assessment of farmers’ perception about the performance of the irrigation scheme was conducted using structured questionnaires and group discussions. All respondents confirmed that the establishment of the scheme is very important for them to secure food self-sufficiency. The survey established that (75%) the major causes for the under-performance of the scheme are sedimentation from the headwork and/or canals.Generally, the performance of the irrigation system was poor. Therefore, the conveyance systems should be improved through regular canal cleaning and maintenance of infrastructuresand constructing flow control gates (metal sheets) are basic remedial measures. | en_US |
| dc.language.iso | en | en_US |
| dc.subject | Hydraulic engineering | en_US |
| dc.title | PERFORMANCE EVALUATION OF SMALL SCALE IRRIGATION SCHEME:THE CASE OF GOMIT SMALL SCALE IRRIGATION SCHEME ESTIE WOREDA | en_US |
| dc.type | Thesis | en_US |
