Irrigation performance of a water distribution system: The case of Kigugu irrigation scheme-Mvomero district Morogoro region Tanzania
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Date
2024
Journal Title
Journal ISSN
Volume Title
Publisher
Science publishing group
Abstract
This study assessed the performance of the Kigugu Irrigation Scheme's water distribution system in Tanzania with an emphasis
on its impact on crop yields. We used a combination of participatory tools and direct observation to gather comprehensive data,
including weather patterns, water discharge rates, and farmer input levels. Descriptive statistical analysis revealed significant
variations in water distribution across canals, with Relative Water Supply (RWS) values ranging from 0.7 to 5.9, indicating
instances of both over- and under-supply. Despite these variations, satisfactory performance was demonstrated by the irrigation
system, with high Water Delivery Performance Ratio (WDPR) values consistently recorded above 0.65, indicating that water
demands were largely met across the system. Furthermore, the study found that equity in water distribution improved
significantly during the growing season, with the equity index dropping from 0.2 to 0.1. This underscores the critical need for fair
water allocation practices, particularly during low-flow periods, to ensure that all farmers receive an adequate supply. Based on
these findings, several recommendations for irrigation system modifications were proposed to further improve water distribution
and equity. In terms of productivity, a notable correlation between water distribution and crop yield was observed. A canal with a
design discharge of 0.0228 m 2 /s produced a yield of 552.18 metric tonnes, demonstrating efficient water utilization. In contrast,
canal SC.4-2, with a lower discharge of 0.0185 m2/s, achieved a smaller yield of 274.31 metric tonnes, further highlighting the
importance of optimal water distribution for enhancing agricultural productivity. Overall, the Kigugu Irrigation Scheme
maintains a reliable water supply, contributing positively to sustainable water resource management and agricultural
productivity. This, in turn, supports local economic growth, enhances food security, and improves community well-being. The
study’s findings provide critical insights for future improvements in irrigation management and resource allocation
Description
Journal article
Keywords
Irrigation Performance, Water Distribution System, Crop Yields, Relative Water Supply, Water Delivery Performance Ratio
Citation
https://doi.org/10.11648/j.ijimse.20240901.12