Ahmed Mohammed Hussen*
Expanding efficient irrigation systems across various scales is one of the best approaches for ensuring reliable and sustainable food security. However, many irrigation schemes in developing countries, particularly in Ethiopia, are underperforming compared to their design capacity. This research, conducted in Assosa Woreda, Benishangul Gumuz regional state, focused on evaluating the Hoha small-scale irrigation scheme's performance using internal indicators. Field water management was assessed based on primary and secondary data. Water flow rates in the main and tertiary canals were measured using the float method and a 3-inch Parshall flume.
The analysis of internal performance indicators such as conveyance efficiency, application efficiency, storage efficiency, distribution uniformity, and deep percolation ratio was performed at the head, middle, and tail sections of the irrigation system. The results showed that the Hoha irrigation scheme's conveyance efficiency was 48.40%, indicating room for improvement in water conveyance. Application efficiency was found to be 57.28%, while storage efficiency was 88.39%. Distribution uniformity and deep percolation ratios were 92.33% and 41.7%, respectively. Overall irrigation efficiency was 27.72%, which is below the desired level. These results suggest a need for significant improvements to enhance the scheme’s overall performance.
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