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W Beck

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  1. Hello, I am attempting to use WMS / HEC-RAS to determine the threshold discharge for overbank flow in a third-order watershed. This is part of a floodplain sediment storage study. I am running a series of flows through the model and trying to determine the minimum discharge required to initiate overbank flow. I am assessing the overbank threshold visually, using flood depth contours (generated within the _fd dataset). I assume the presence of any flood depth contour ≥0 represents overbank flow in my WMS model (see attached image 1). I also assume that stream reaches without contours prese
  2. I am at the point where I am able to run steady flow analysis for my HEC-RAC .prj file. However, during the initial stage of post processing, WMS "freezes up" after I select HEC-RAS --> Read Solution. The message "(Not Respoding)" is displayed in upper region of the screen (see attached image). The 2 error messages (attached) also appear. I let this continue for 15-20 minutes before force quitting WMS. Some history: I was originally performing the analyses on my laptop, and was able to get a bit further in the process (i.e., the 2-D scatter point files were created) before WMS "fr
  3. I extracted my drawn-in cross sections from the TIN to create a new cross section database (in prep for HEC RAS). When saving and exiting my .wms file, I was given the following error message (image below). Should I be concerned with this, and if so, how do I address it? Why did this occur? Thank you.
  4. I created a HEC-RAS network schematic, and was in the initial stages of running HEC-RAS when a series of errors occurred. These errors stemmed from the fact that some of my cross sections did not intercept the left overbank (LOB) and / or right overbank (ROB) lines (middle image). Compare to the top image, where the cross section intercepts both LOB and ROB. I did not realize this was critical when creating the cross sections in WMS. Extending the cross sections beyond the LOB / ROB would seem to solve the problem. As you can see in Image 3, when the cross section does not intercept one of the
  5. Chris, Thank you for the advice. I ended up removing points from the extracted cross section prior to merging - this worked nicely.
  6. I am attempting to align (merge) my DEM-extracted cross sections with field survey cross sections (step 6.4 in "Managing HEC-RAS Cross Sections" tutorial). Can you provide any general rules of thumb when attempting alignment? I have attached a series of screenshots to illustrate my questions. Shot A: I have added the field survey cross section (dark line) - I have offset it so you can see it better. Notice that on my field survey, the west top bank is lower than the east top bank. For the DEM extracted cross section (light line), the east and west banks are generally on the same le
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