We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Modeling Optimal Canal Conveyance Capacity for the Ahero Irrigation Scheme using the Hydrologic Engineering Centre River Analysis System (HEC-RAS).
- Authors
Owino, Justus W.; Ong'or, Basil. T.
- Abstract
Irrigation plays a critical role in addressing food security as envisaged in Kenya’s development blueprint, the Big Four Agenda. However, the performance of any open channel irrigation system is a function of its canal conveyance efficiency, among other factors. To overcome challenges with irrigation water conveyance at the Ahero Irrigation Scheme, a Hydrologic Engineering Centre River Analysis System (HEC-RAS) model was used to simulate the flow characteristics at the tail-end section of the canal network, covering a total length of 2.6 km. The study also consisted of a comparative review of an FAO-CROPWAT model estimation water requirement for rice. The manual estimation of the canal capacity in its unmaintained state revealed a discharge capacity of 0.228 m³/s, which was significantly lower than the minimum crop water demand requirement estimation of 0.3166 m³/s (a 28% water deficit). The simulated characteristics projected an optimal flow capacity of 0.583 m³/s. The study recommends canal maintenance (levelling bed undulations, dredging, and smooth concrete lining) to attain the optimal flow capacity at the tail end of the network.
- Subjects
IRRIGATION; CANALS; FOOD security; HYDROLOGY; WATER requirements for crops
- Publication
Journal of Water Management Modeling, 2023, p1
- ISSN
2292-6062
- Publication type
Article
- DOI
10.14796/JWMM.C510