What are the freely available hydraulic models that can be used to understand hydraulics in canal system of large scale irrigation (65000 hectares) scheme? The canal system has sediment problem and has decreased the capacity of canal in some portions. Which model is suitable?
The US Army Corps' HEC RAS software which is free to download and also has various user and technical manuals is certainly a possibility. HEC-RAS will model sediment transport see here http://www.hec.usace.army.mil/software/hec-ras/ for more details.
This paper see http://ijesi.org/papers/Vol(4)9/D049015031.pdf looks like it could be of use to you because it details work to model sediment transport in an irrigation canal system in Kenya using the HEC-RAS.
IWMI has also produced various relevant software see: http://www.iwmi.cgiar.org/resources/models-and-software/ including OASIS (Options AnalysiS in Irrigation Systems). I have not used OASIS, my understanding is that it is more of a water balance tool.
MIKE is another possibility, more's complete hydraulic module, but it's so expensive
HEC-RAS it's only free software solutions that could be use to analisys hydrolic.
I agree HEC-RAS model could be a good option (free software). You can also check at USACE web page for specific free sedimentation models.
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