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Recent content by larryTHUR

  1. larryTHUR

    HEC-HMS Reservoir

    I had try several initial conditions. So far, so god. When i choose elevation al initial condition, i had to enter a value which is above my elevation in the tables. Otherwise: Computed pool elevation is below minimum table value for reservoir "TEST". In the tables i had enter a value for...
  2. larryTHUR

    HEC-HMS Reservoir

    Thanks, now it works. But i have an other question. There are some tables where you have to enter values for the discharge (Elevation-Discharge, Storage-Discharge). Is this the discharge from the formula: √2gh or can i enter the discharge which results from the metrics of the outlet...
  3. larryTHUR

    HEC-HMS Reservoir

    One more question. i try it with overtop dam. For this i need the elevation of the dam. But when i enter the maximum elevation of the reservoir/waterlevel, i become the message: Computed pool elevation is above maximum table value for reservoir "HRB_Test". Why must i choose a elevation under...
  4. larryTHUR

    HEC-HMS Reservoir

    Okay, but for a spillway i have to make many details, which i don't know. I only have some pictures and a DEM. Perhaps i can add a new elevation within or above the freeboard and give her a realy great discharge for "overtopping the dam?
  5. larryTHUR

    HEC-HMS Reservoir

    Hello again, i got the problem that i want to use a reservoir to catch some a part of the flood (in german: Hochwasserrückhaltebecken ;)). The thing is, that the volume of the reservoir is really small, so HEC-HMS end most of the simulation runs because: "ERROR 41346: Computed storage in...
  6. larryTHUR

    HEC-HMS

    Hello, one question again. I'm working on my first project with HEC-HMS. I got a example, but i want to understand what i'm done. For a subbasin, you can choose the Baseflow Method Recession, like in my example. After this you have to enter a recession constant. Where can i get this figure or...
  7. larryTHUR

    HEC-HMS Table Input

    Hello, i got a similar problem. When i tried to enter time-series data for the precipitation gage, there are no values in the "time" column and i can't enter values by my self. I can only enter values for the precipitation, but when i choose another tab, the values are lost. Saving the model...
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