![]() Generally, in both irrigation schemes there were a number of irrigation structures which were malfunctioned. The highest sediment accumulation was observed at head and middle reaches of the irrigation schemes than the tail reaches for both irrigation schemes. For both irrigation schemes, the average water surface elevation ratio, delivery performance ratio, and delivery duration ratio of the main canal during the monitoring period was less than one, greater than 5%, and 150% respectively. However in Mychew, the adequacy (0.75) and equity (0.28) of irrigation water was categorized as poor, while good and fair for dependability (0.08) and irrigation efficiency (0.79) respectively. There was no any problem in irrigation adequacy, equity, dependability and efficiency of irrigation water in Tahtay Tsalit irrigation schemes. ![]() Several factors such as flooding, sedimentation, design problem, damage of sluice gates, abstraction of irrigation water by unwanted plants has been identified in both schemes for malfunctionality of different structures. However, hydraulic performance indicators were used to evaluate the performance of the two irrigation schemes. Simple descriptive statistics was employed for analysis of the data collected from group discussions and observations. Moreover, field measurements on canal dimensions and water flow measurements were undertaken at selected sampling points. Hence, comprehensive field observations and focus group discussions was held to investigate the cause and effect of failed hydraulic structures. ![]() Moreover, identification of the cause and effect for malfunctionality of irrigation structures was also another objective of this study. ![]() ![]() However, the performance of Tahtay Tsalit and Mychew irrigation schemes were not assessed yet and hence, this research was undertaken to investigate and compare the performance of the two small-scale irrigation schemes. Assessment of irrigation performances is very essential in taking different water management strategies. ![]()
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