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Found 3 results

  1. I went back to a model that I hadn't worked on in 9 months or so. Everything seems to be set-up ok (bc reasonable, mesh, etc), but I keep getting the run error message that the srh_pre-v30.....exe file is unknown (see attached screen shot). Which I thought might mean the program can't find the executable. But when I go to preferences, it is pointing to the right folder and executable. Is running from a previous version a problem? Thoughts?
  2. Hello, I've been using HEC-HMS for just about two years now and I'm still learning all of the details of it. I have a detention pond which is draining 1.76 acres onto a state highway. I have put in the Elevation-Area Table in the Paired Data. There is an outlet pipe (the only outlet) of 18"; it's inlet elevation is 1278.00. I'm assuming that is the very bottom of the detention pond, because in the drawing, contours are shown for this pond starting at 1279.00. When I run the 2-year Type II SCS Storm of 3.30 inches, the following error occurs and the process is aborted: "ERROR 40254: Computed pool elevation is below minimum table value for reservoir "Detention Pond". There is also another error which follows the above error. It is ERROR 40261: Reservoir routing failed at simulation time "1 January 2000, 00:05:00" for reservoir "Detention Pond". Because I get an error relating to the time control specifications, is there not enough model time for the pool elevation to get high enough to prevent the first error from occurring? Is that what is happening? Or is it something else? This program can do so much and I'm still so very confused over half of it!! I need a one-on-one tutor to tell me, in layman's terms what all of the components are and what their methods are. Thanks for any advice! Denise
  3. Hello, I am running a watershed simulation with HSPF for temperature modeling. The run period is approximately 10 years. When I run the full period, the HTRCH group stops functioning for 3-4 weeks at time, generally a couple times between August and October each year. During these periods the modeled stream temperature becomes unstable and increases >100 deg F. At first I thought it could be a data integrity issue, but when I decrease the run period to isolate these occurrences, the HTRCH group seems to function properly and the modeled stream temperature remains within an appropriate range, throughout the shortened run period. I'm wondering if anyone else has experienced this happening. I've checked to make sure the run is not exhausting the resources on my computer (i.e. RAM, CPU, ETC), and everything seems fine during the run. Thank you, Theo