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Everything posted by Waverly

  1. Hello, I'm working the the MODRAT hydrology model. I was wondering if the Reservoir (or detention basin) routing feature is still included and, if so, if you had any more guidance on the feature. I see it is referenced in the "Schematic" MODRAT tutorial, but I just don't see where I can turn on the Reservoir Routing display option in the MODRAT parameters window. Is there a screenshot of this option anywhere? Or has it been removed? Thank you!
  2. I am currently working on the "Watershed Modeling - MODRAT Interface (Map-based)" tutorial. I have been stuck at the point where you apply rainfall depth and distribution to the drainage areas. I keep on following steps 1 through 6, but when I try to complete step 7, the rainfall depths are not applied to the drainage areas. See Steps below: "7.3 Rainfall Depth & Distribution AssignmentYou will now load a rainfall depth grid for the 25-year storm frequency for Los Angeles County and let WMS compute the average rainfall depth for each basin. Then you will assign a rainfall mass curve to the model to provide the temporal distribution of the storm depth.1. Switch to the Drainage module2. Select File | Open…3. Change the File Type filter to Rainfall Depth Grid (*.*).4. Open the file named “lac25yr24hr.asc” – the rainfall grid will be opened and displayed.5. Right-click on the Drainage coverage in the Project Explorer and select Zoom To Layer.6. Switch to the Hydrologic Modeling module7. Select Calculators | Compute GIS Attributes….8. Select Rainfall Depth as the Computation.9. Select OK.10. Double-click on the basin labeled 1A to bring up the MODRAT Parameters window and view the Rainfall Depth assigned.11. Choose Show: All in the upper right corner of the dialog.12. In the Temporal distribution column click on the Define… button in the All row (colored yellow) of the spreadsheet. This will bring up a window where you will specify the rainfall temporal distribution (time vs. cumulative rainfall percentage).13. Select the Import button in the XY Series Editor.14. Open the file named “LACDPWStorm-4thday.xys”.15. The Selected Curve in the XY Series Editor should now read LACDPWStorm-4thday and the rainfall mass curve displayed.16. Select OK.17. Select OK."For soil number and the impervious surface computation, a new coverage was created, but that is not true for this parameter. The reason I mention this is because that when I open up "Compute GIS Attributes..." in step 7 above, there is an option that uses "WMS Coverages" or "GIS Layers" as can be seen in the attached image. But there is currently no coverage for the 25 year 24 hour storm. Instead the "lac25yr24hr" file (that contains the depth data for the 25 year 24 hour storm) is located under terrain data in the top left of the attached image, and has not been applied to a "Coverage" yet. Is there a step missing? Thanks for your help in advance.
  3. Chris, Thank you for your prompt response. I had a feeling this was the direction I would need to use, but wanted to verify with someone more familiar with the program. I will revisit those tutorials and try implementing the ideas in my model. Thank you again!
  4. I am working on a master drainage project for a city and I'm looking for some tips and suggestions for how to most efficiently use WMS. I am somewhat new to the program and I'm not quite sure how to accomplish what I want to model. Mostly, I will need to model master drainage channels and large storm drain pipes within the watershed. What is the best, most efficient way to input this data? We would also like to model the major culvert passings and road embankments. To further complicate things we are only modeling a portion of the city and there is another city uphill of this one whose drainage facilities come into our portion. Is there a way to add this data as inflow points on the boundary of the watershed (our boundary will be drawn at the city line)? The watershed is on the scale of 100 sq. miles in a relatively flat, urban area. Thanks in advance for any suggestions given!
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