[hamidciv]

hi dear experts

I'm in doubt to choose TLEN parameter, i'm working on sediment scour, water depth in my flume is equal to 700mm and height of the sand bed is 320mm, value of the water depth on my sediment bed is equal to 380mm, because water is also included sediment thickness. as the flow-3D manual has recommended, it is equal to 7 % water depth but in sediment simulation, I don't know, what should I consider the value of this parameter? do i consider it eqaul to water depth on sediment bed(380mm) or total water depth(700mm)?

If anyone has experience on my problem, please advise me.

i would be grateful for any comment.

best regards
hamid