Forces involved in wave of water

[TBCEng07]

I am designing a concrete pad that is to receive wastewater and material removed from a sanitary sewer. A screen will be placed acrosss the pad to keep large debris out of the drain. I am trying to figure out where to begin as far as designing the screen to handle the wave of water that the sewer operations staff will release on the pad. I know for a fact that they have bent the last two screens that were installed on the old pad b/c they unload 1000 gallons of water in like 30 seconds. I didnt know that the truck had to be unloaded like a Nascar pit stop.

Anyone have any thoughts on how to stiffen the new screen up. Seems to me that there should be some equation to calculate the energy disapated by a wave of water 2 feet or so high.

 

[cvg]

mount the fine screen onto a heavier bar grate.