Jump to content
GMS, SMS, and WMS User Forum

HEC-RAS overbank Mannning's n


Recommended Posts

Hello, I am working with an existing HEC-RAS model. I have noticed that when I lower the manning's n in the overbank area adjacent to the banks, the water surface actually rises. I have not done any storage routing, so the flows are the same. Please let me know why it is doing that.

Thanks,

Ashish

Link to post
Share on other sites
  • 4 weeks later...

Hi Ashish,

That is very interesting that your water surface rises when lowering the Manning's n value. Maybe something else in your model is changing, causing your water surface to rise. I'd compare everything in your models before and after changing the Manning's value. Has anybody else seen this or have any input on this topic?

Chris

Link to post
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...