HEC- Ras: Water leaves riverbed
HEC- Ras: Water leaves riverbed
(OP)
Hello everybody
I'm new in ths Forum and this is my first post. So if I forget to follow any Forum rules or something, please tell me.
Now to my Problem. We are doing a river rehabilitation/ renaturation. In HEC- Ras we implemented the future crosssections of the river. The Problem we have, is that if we do a stady flow Simulation we get water covered areas beside the riverbed (look at attached photo). The Areas which are cover with water and do not belong to the riverbed are always lower than the riverbed, which is probably the reason for Problem. So my question: is it possible to have lower floodplains in HEC-Ras, without them be covered by water?
Thanks for your help
have a nice day!
I'm new in ths Forum and this is my first post. So if I forget to follow any Forum rules or something, please tell me.
Now to my Problem. We are doing a river rehabilitation/ renaturation. In HEC- Ras we implemented the future crosssections of the river. The Problem we have, is that if we do a stady flow Simulation we get water covered areas beside the riverbed (look at attached photo). The Areas which are cover with water and do not belong to the riverbed are always lower than the riverbed, which is probably the reason for Problem. So my question: is it possible to have lower floodplains in HEC-Ras, without them be covered by water?

Thanks for your help
have a nice day!
RE: HEC- Ras: Water leaves riverbed
RE: HEC- Ras: Water leaves riverbed
As stated above, you either need to end your cross section at the top of bank or it an ineffective flow area.
As an aside, it's pretty obvious your channel won't convey whatever storm events your are modeling. I would model the top of bank as a lateral structure so that you can determine how much water is cresting the bank. From the look of you essentially have parallel channels.
RE: HEC- Ras: Water leaves riverbed
RE: HEC- Ras: Water leaves riverbed