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Sushban's Achievements


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  1. Thanks Chris, I guess I will have to burn the keys to switch to WMS 10 (Beta) Version, is that correct? Is there an expected date for the release of WMS 10 regular version?
  2. I learned about WMS supporting PEST based auto-calibration method from this link: http://www.xmswiki.com/xms/WMS:GSSHA_Calibration I was trying to explore more about it but I can't find "Calibration Setup" button in WMS to set up PEST auto-calibration. I am using WMS 9.1.12 version. Does WMS support both SCE and PEST auto-calibration method?
  3. Sushban

    about GSSHA

    Chris, The purpose is to use GSSHA for irrigation farmland with relatively flat terrain. I understand that high resolution elevation data will be required to represent flat areas. But if there are regions with local depression in the field, it will also create digital dams. Will it be a good idea to remove these digital dams and instead represent these using retention depth in the mapping table? http://gsshawiki.com/Surface_Water_Routing:Overland_Flow_Routing Section 5.2.3 Runoff Retention It explains that the water held in the retention storage, never becomes direct runoff and can only be removed from the land surface as infiltration. Retention storage is input as a depth (mm) as a table of values related to index maps by using the mapping table. Sushban
  4. Sushban

    about GSSHA

    Thanks Chris, From what I read in tutorials in gsshawiki, " digital dam exists as a result of a lack of grid's elevation resolution", " the presence of digital dams creates problems with surface runoff as the water ponds in artificial depression", and it explains how these digital dams could be removed and fixed using different manual and automatic techniques. Clark Barlow, in this thread, replied that if water really does pond, you may not want to remove the digital dams. So, if we do not remove some of the digital dams, which are natural depressions, then I am interested to learn how GSSHA performs overland flow process. Does the water ponded in the digital dams route to downstream rivers when there is excess water to over-top neighboring cell elevation? Or it can just be infiltrated and evaporated? Sushban
  5. Sushban

    about GSSHA

    Is the process defined in gsshawiki or other sources, about how does overland flow process work if we do not remove digital dams assuming water really does pond there?
  6. What version of GSSHA does WMS 9.1.8 have?
  7. Attached picture is from the GSSHA long-term runoff simulation summary file. Although the first rainfall event starts on 07/14/2013 at 15:00, the summary file writes Hydrometeorology (hmet) data began on 07/15/2013 at 2:00. Is this delay normal, shouldn't both rainfall and hmet data start on same time? Seaworth06.txt
  8. For long term simulation in GSSHA, where can we download direct and global radiation? I downloaded other hydrometeorology parameters (Pressure, Sky Cover, Wind Speed and Temperature) from NCDC website (http://gis.ncdc.noaa.gov/map/viewer/#app=cdo). Relative Humidity was estimated based on dew point and average temperature using this formula: RH: =100*(EXP((17.625*TD)/(243.04+TD))/EXP((17.625*T)/(243.04+T))) Is there any other recommended method for Relative Humidity estimation?
  9. Good news, I installed the latest version of WMS (9.1.5) and now I can import online maps including World Imagery and World Topo Maps like before. I wonder if the problem is totally fixed or if there is limited number of times I can access these maps before it becomes inaccessible.
  10. I currently use WMS Version 9.1. I like the "Get Online Maps" and other added features in the new versions. Until recently, I was able to import "World Imagery" and "World Topo Map" but it's been few days when I try to import, error message (attached) pops up saying - "There was a problem loading online image. The Error ID is 20." However, I can still import "NAIP Color Imagery for US".
  11. That's what I thought. I have a question, in general, for Chris and others interested. What parameters are most sensitive to controlling the shape (slope, volume,..) of falling limb of hydrograph?
  12. GSSHA needs observed peak and volume flow data to compare calibration runs for a closeness of fit. If an observed hydrograph has multiple peaks for a single event, how will automatic calibration in GSSHA deal with that? Also, does automatic calibration in GSSHA tends to match observed peak and volume only, but not the shape of hydrograph?
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