Forum Replies Created
-
AuthorPosts
-
cameronParticipant
You could manually skew the data in excel including the piers and then enter in the skewed data into HEC-RAS. If the piers are circular, you would then need to include each pier in series. If the bridge never sees pressure flow, you could just model the piers and abutments as blocked obstructions.
cameronParticipantSnagIt is what I currently use.
cameronParticipanthave you tried converting the tif a flt or asc format?
cameronParticipant*.rasmap is the mapper file.
cameronParticipantThe width of the deck of your bridge plus the distance from upstream cross-section is greater than the reach length between the upstream and downstream cross-sections. to fix it, you need to adjust the width of the bridge deck or distance to upstream cross-section.
cameronParticipantAnother option would be modeling the whole thing as 2D or just 2D upstream of the the second reservoir.
cameronParticipantWhat do your cross-sections near the downstream boundary look like?
cameronParticipantI agree with Lonnie and check that the correct manning values are being used. I have run into multiple occasions when HEC-RAS would revert to using a single roughness value for no reason and it is almost impossible to track down why.
cameronParticipantYou can save the depth results as a grid by setting up the map parameters in Mapper. This can then be used to create an inundation map. The other option is to set up an inundation map result layer in Mapper. The link below tells you how to do it.
http://hecrasmodel.blogspot.com/2016/02/post-processing-creating-inundation.html
cameronParticipantany other message beside the stop message?
cameronParticipantThis usually happens if the flowpaths are digitized in the wrong direction.
cameronParticipantThe max depth is from the entire simulation based on the time step interval (seconds). When you animate it, the depths are based on your mapping interval and not time step (minutes). The max depth may occur at time 1 hour and 4 seconds and unless which your mapping interval may skip around it.
December 19, 2015 at 6:58 pm in reply to: Water not staying in river channel but spreading all over. #9597cameronParticipantHow good is the topographic data? From the cross-section you showed, it does not look very good.
cameronParticipantDid you set the to connections so it knows to go from river to the 2D area?
November 25, 2015 at 10:20 am in reply to: HEC-RAS Beta 5.0 does not run. Error message: hdf5*.dll #9571cameronParticipantThere are two folders that have the hdf5 files, one is in the 64-bit folder and the other is in the 32-bit windows folder. There is a post somewhere on this blog where I gave the exact locations, but I can’t seem to find it.
-
AuthorPosts