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Don't know if you are still interested, but I did some investigation of this a couple of years back. We were dealing with a weir operating v close to modular limit, so the position of this and further drowning effects was important. I compared formulae/charts provided by Ackers (1971); King...

Hi, We are designing an overspill gate weir and need to ensure ventilation of the the nappe to avoid vibration. Designing the vent pipes is proving to be a bit of a challenge. Can you suggest any references we can refer to? In general sizing is OK, but what is not clear is what reduction in...

I have a common problem relating to sizing of rock armour downstream of a number of existing low head (~2m) gated hydraulic strucutres with a level invert/apron (ie no stilling basin). In the absence of good downstream scour protection these structures typically dig a hole in the river bed...

Colleagues, I am designing a pipe siphon to effect the drawdown of a reservoir under emergency conditions. To give a sense of scale I've done a preliminary sizing at 0.5m dia. I've struggled to find any good guidance on the design of this type of installation (there seems to be plently out...