Irrigation Water Management and Its Impacts On Crop Production and Agricultural Land: The Case of Metti-Walga Irrigation Scheme in South West Shoa Zone

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Addis Ababa University


This study examines irrigation water management activities in Metti-Walga irrigation scheme and effects of this irrigation on crop production, income generation and employment cr eation with existing water control. To serve this objective, household survey, FGDs, interview and field observation were used to colJect data at group and individual levels. The questionnaires were administered and filed by using 10calJy recruited and trained enumerators. The analysis was undertaken using simple statistical methods. 105 respondents were selected by lottery method from the total population of 740 irrigators. The findings of this study highlight the negative effects of irrigation on cultiva ted land and agricultural productions. Mismanagement of irrigation water resulted in rise of the water table, which ca uses water logging. About 20 hectares of the cultivated land at lower-lying and flat areas are converted to water logged and the production of irrigated crops declined. However, the irrigation scheme enables farmers to generate more income and able to create employment in the scheme. The Price and demand for irrigated crops increase due to facilities improved fOJ- m arketing agricultural productions. But sustainability of the scheme is in a serious problem. The study reveals that irrigation use activities such as control structure, water management activities and organizational structures are inadequate. Conveyance systems are inefficient because of water loss through ca nal seepage, percolation and leakage. Water use activities s uch as water alJocation, distribution and field application are inappropliate. Organizational structures that are responsible for managing the physical structures and water use activities l ack coordination and integration. This resulted in inefficiency of the irrigation system . Farmers were organiz ed in the form of Irrigation Groups and Water Users Groups for activities ofinigation management but lack institutional arrangement and inadequate tl-aining of users made organizational control activities. Woreda Agricultural and Rural Development Office has shortage of skilled manpower and budget to train and assist the farmers in operation and maintenance of the control structures. Hence, lack of awareness, skl1led m anpower and coordination to manage irrigation system m ake the conveyance system and field application inefficient. These poor irrigation water management activities causes wastage of water that resulted in shortage of inigation water in the scheme and conversion of cultivated land to water logging.



Water Management