Arnaud Duranel

Hello
I have a question re the floodplain resistance tab in the hydrodynamic editor. From the Mike11 manual I understand that floodplain resistance values, either global or local, apply above the "level of divide" specified in the cross-section raw data editor (under "Morphological model"), whereas the bed resistance value applies below that level. However, in my case, changing the floodplain resistance (even by 2 orders of magnitude) does not change the river level at all, even though the river level is higher than the level of divide. I got the same result using a simple model with one branch, a few triangular sections (with default parameters) and a constant inflow: the floodplain resistance, unlike the bed resistance, has no impact on river levels, even when the river level is higher than the level of divide. What am I missing here? The level of divide has to be specified as level above the bed bottom, right?
Please note that I use Mike 2009.
Many thanks.
Arnaud
UCL Department of Geography, London