I am using Nays2Dflood to design the reduction of the peak discharge in a channel by exploiting the storage capacity of the channel. Initially, the channel is empty and with a steep slope (> 5%).
I was thinking of dams with a window in the bottom (like a gate).
for low flow the gate should drain the water. For higher flows the water would first accumulate in the channel and then flow over its top.
I am doing that now by increasing the topographic level at some sections but I can’t represent the low flow conditions
Also I tried to use a gate but not overtop flow of the gate can occur.
any help / suggestion would be most welcome