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Found 7 results

  1. Greeting, I will like to know how GSSHA handles the variable stage (water surface elevation) boundary conditions. Does the GSSHA water depth results for a cell are being forced with this overland flow boundary condition if the feature point is located within the same cell or the boundary condition is being applied at the cell and GSSHA is allow to compute the hydrodynamics for this cell? In other words, does the GSSHA water depth results will be identical to the boundary condition applied at the same cell. Also, what does GSSHA does between the variable stage overland boundary
  2. I am having a problem with my WMS 10.1.17 where when I run the CleanDam tool and accept changes, but the resultant grid still has depressions. It isn't readily apparent until I run a GSSHA simulation and look at the ponding. When I turn on digital dams in display properties I get no display of digital dams, however when I look at the flow directions with my depth grid, I can plainly see all four arrows pointing inward and a pond. I turn on elevations display values which confirms the flow directions honor the elevation file. I have tried running CleanDam externally from WMS as well with no
  3. I'm attempting to model a small basin (~0.2 sq mi) using a long-term simulation. I can get the model to run without errors or warnings, but some of the model results are counter-intuitive. So I'd like to verify if I've set up my model correctly and throw out a couple concerns/questions that some of you might be able to help me out with. Some quick background about my model setup: I'm using a single rain gauge located very near the basin boundary, defined using a .gag file with hourly data for the duration of November 2009. I've compiled WES format hydrometeorological data file that also g
  4. Hello everybody, I'm trying to run long-term simulation but it falls down very quickly. I suppose that the problem can be in my precipitation data file (.gag) as the last message concerns the precipitation data. Is there anyone who could confirm that to me? I attach the printscreen. The .gag file can be found at /data/files/osobni%20stranky/Vaclav%20David/model_data20180222_6_cont_prec.gag THanx in advance for any advice. Vaclav David
  5. Hello, My project has two large drainage basins that were delineated by creating two outlet points. However, after running the simple GSSHA model, only one hydrograph and summary data is created. Is it possible to generate hydrographs for both outlets as well as at other nodes in the model? Thank you in advance!
  6. Hello, I'm attempting to construct a GSSHA model of a low-relief watershed containing a significant number of natural topographic depressions. I'm uncertain about how to build and apply the depression polygon mask within WMS. I have a polygon shapefile of the depressions for this watershed. Can someone either point me in the direction of a tutorial on this process, or provide general steps within the answer to this post? Thanks, David
  7. Hi. I was wondering if anyone could clarify an aspect of the water elevation in the channel when using GSSHA. In the development of the channel input file for GSSHA, firstly stream arcs are generated from the DEM in WMS for GSSHA; then the thalweg profile (vertices) are then assigned elevations and corrected using the Smooth GSSHA Streams dialog box; and finally channel properties (channel depth, bottom width and side slope, and Manning's N) are assigned (using the Feature Objects -> Attributes). Figure 1 (attached) illustrates the cross-section of a river, where the brown line is a 40m res
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