How to create river centerline and river bank from DEM

Discussion created by on Jan 20, 2013
Latest reply on Jan 21, 2013 by tomdilts

I am working with ArcMap10 and HecGeoRas10. I want to export data from GIS to hec-ras. I read a tutorial and understood how to do this, but I have a problem. How can I determine the centerline and river banks accurately? Of course by using elevation maps and tools in HecGeoRas it's not possible to determine the exact centerline and banks!

One method is to import data in Hec-Ras and change the data for river banks there, but for my case it's not possible to check all the cross sections! Because I'm working on a long river and I have a lot of cross sections.

Thank yo very much if you could help me.