Wind induced waves in narrow irrigation canals

[Philip_Crawfor]

Hi,

We are trying to estimate the likely maximum wave generated from wind blowing along an irrigation canal. We will subsequently estimate runup and the required freeboard to prevent overtopping.

Our canal is ~ 5m deep, has 1:2 side-slopes and a 4.6m wide base. The canal is aligned with the prevalent wind for ~8 km but within this reach there are a number of significant kinks.

Currently we are using wave theory for dams / shore protection but these assume wide water bodies. Does anyone know how to quantify the wave height for a narrow canal? I would assume wave generation to be considerably less for a water body that is narrow like a canal.

We are unable to find any research on this topic. Any advice would be greatly appreciated.

 

[SteamKing]

You can start with these studies and design standards:

http://www.usbr.gov/pmts/hydraulics_lab/pubs/HYD/HYD-465.pdf

http://www.usbr.gov/pn/snakeriver/landuse/authorized/designstandards3.pdf

 

[Huyen401]

Hi there,

I am not an expert in this field, but I did some research and found a few resources that may be helpful to you.

Firstly, I found a study from the International Journal of River Basin Management that discusses wave generation in narrow channels and its effects on river structures. The study suggests that wave height in narrow channels is influenced by factors such as channel width, depth, and curvature.

Additionally, I came across a research paper from the University of California, Davis that specifically looks at wave generation in irrigation canals. The paper suggests that wave height in narrow canals is affected by wind speed, canal geometry, and the presence of vegetation.

Based on this information, it seems like you may need to consider the specific characteristics of your canal (such as the kinks and alignment with wind direction) in order to accurately estimate the maximum wave height. It may also be helpful to consult with a hydrologist or other expert in this field for further guidance.

I hope this helps and good luck with your research!