Ayman98

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Everything posted by Ayman98

  1. Hello, When modeling a number of diversions (or other elements) with the same geometry at different locations in the watershed, the HEC-HMS generates the same number of basins with zero values such as the Area, Curve number, Impervious %, .... and Lag time (min). What about the Lag time computation for each Diversion, is it right to set it the same for each diversion? Do I have to calculate it manually using the known Lag time equations? If the diversions have the same geometry, the Lag time will be the same, is this correct? Any clarification will be appreciated on setting the Lag time and its importance and effect on the model calculations. Best regards
  2. Hello, I mapped lakes polygons over the Drainage coverage, and set the polygon attributes to Lakes, and saved the project as HEC-HMS. The lakes didn't appear on the HEC-HMS project, how to fix that to? Best regards
  3. Thank you so much Chris for your kind help. Yes, the Add sink is the best option for the case I mentioned in the figure (or injection wells), I need to use a number of sinks at outlet points inside the watershed, but when use Add sink, it gives an error as "Must select the last outlet" which is not what I need. I would like if the Add sink work at any outlet point. Best regards
  4. Hello Is it possible to model injection wells using HEC-HMS (or open pits to direct the runoff water into the groundwater aquifer as illustrated in the figure or any similar structure for artificial recharge that direct the runoff water into the aquifer)? If possible, how to edit that within WMS? Thank you so much
  5. Hello, I am running HEC-HMS model, in the Define precipitation step, when I use the option of: Frequency storm (to edit the values of rainfall during the storm), the model gives the following error on cleaning the mode: No precipitation time series is defined for basin 1B Why it gives that error? where the precipitation is entered in the Define precipitation step. Best regards
  6. Hello When running HEC-HMS, the difference is so big between the direct flow and the total flow; for example direct flow (1000 M3/s) and total flow (30 M3/s), see attached file, is there any explanation for that big difference? Best regards
  7. Hello, Is there tutorials or tips on installing/creating artificial structure in the GSSHA model such as the following: - Artificial ponds/pans - Injection/recharge wells - Storage dams/ boulder dams Best regards
  8. Hello, Is there a way of exporting the graphs (results) of HE-HMS? Best regards
  9. Hello I am trying to calibrate a GSSHA model, the hydrograph is over estimated, I calibrated the sensitive parameters even at the minimum or maximum to decrease the discharge and the hydrograph to the observed value or close to it but still over estimated, what else I have to look for? Thanks a lot.
  10. Hello, I am trying to include the evaporation/evapotranspiration in GSSHA, the modeled area only includes about 10% vegetation and the rest of the landuse is dry areas (roads, gravel, open spaces, commercial, urban). My question is what about the paramere values in case of no vegetation, can I put zero (0) or I have to use certain values for vegitation radiation coefficient, canopy stomatal resistance. Is there a standard values/tables for these parameters to have an idea and obtain approximates appropriate for my stuy area (Sinai, Egypt). Also, if I used the evapotranspiration table as shown above, does th model will calculate the evaporation from the soil/land uses during the rain storms? Best regards
  11. Hello, Is there any way to check the adverse slopes instead of the visual inspection as there may be a very small tributary that can't be seen. Best regards
  12. Hello, I am trying to run GSSHA but it gives this error and can't run: A non-real overland flow water depth has been detected in cell 411 after applying overland boundary conditions and overland pumping. Why that error and how to fix it? Best regards
  13. Hello, I am trying to run the GSSHA model, it is initialized and didn't go through, but with the infiltration option off it is working well, what is the problem and how to make it running with the infiltration option on. Best regards
  14. Hello The hydrograph in the HMS model result is shown as bars not as the known shape of the hydrograph (bell shape or a curve), why is that and how to modify to show the hydrograph? Best regards
  15. Hello, Is there any way for clipping a hydrologic model such as HEC-HMS or GSSHA to focus on a certain sub-basin (s) instead of starting every thing from the beginning of that sub-basin (DEM trimming, running topaz, delineating the watershed, ....etc)? Best regards
  16. Hello I trying to run a GSSHA model but there is an error message as "No links Found" when saving or running the GSSHA mode, what that error means and how to fix it? Best regards
  17. Hello I am running HEC-HMS and I got the following error: "10000 processes could not be completed because of a lack of memory, contact HEC for recommendations." The processor is i7 and the memory is 8 Gb, is that error is really related to a memory, what I can do? Best regards
  18. Hello I am trying to re-delineate the basins after modifying the outlets, every time I re-use the Delineate Basins Wizard, the process take so long time (about 5 hours or more) compared to the previous one.(about 5 to 15 minutes), I didn't add any thing new, just relocating some of the outlets, I am using WMS v. 10.1.10, nothing is related to the computer performance, space on drives and the memory is ok. What is the reason for that, Is there any thing I have to do to clean the previous processes and make the process take the normal time as before (5 to 15 minutes)? Thank you
  19. Hello I still receive this error on saving the HEC-HMS file: Unrecognized time interval (E Part) What that error means and how to fix that? Best regards
  20. Hello When running the HEC-HMS, there are warning and errors as follows: WARNING 20657: Hyetograph gage "NAKHIEL" for subbasin "691B" contains 596064 missing precipitation values that were set to zero. WARNING 41784: Simulation time interval is greater than 0.29 * lag for subbasin "630B"; reduce simulation time interval. ERROR: 10000 Process could not be completed because of a lack of memory. Contact HEC for recommendations. - The precipitation values of the Hyetograph gage are as follows: 12/5/2001 1:00:00 AM 0.25 1/3/2002 1:00:00 AM 0.76 1/9/2002 1:00:00 AM 0.51 1/10/2002 1:00:00 AM 4.06 1/28/2002 1:00:00 AM 0.51 2/11/2002 1:00:00 AM 1.02 10/28/2002 1:00:00 AM 2.03 10/30/2002 1:00:00 AM 10.92 10/31/2002 1:00:00 AM 32.0 ** up to 2016 The time interval in the job control is 15 min How to fix these problems Best regards
  21. Hello, What is the index precipitation and how to determine it, is there any details and examples? Best regards
  22. Hello WMS provides auto-numbering and naming of the sub-basins as well as few sub-basins will be delineated as empty sub-basins didn't have any tributaries. Is there any options to make WMS get ride of the empty sub-basins and combine them with the more logic adjacent ones, and also is there any option for customizing the auto numbering and labeling of the sub-basins. Best regards
  23. Hello I have a number of rain gauges with rainfall intensity (mm) around my drainage basin, they have different start and end dates with daily rain fall, some of them start from 2001 ending by 2016, others start from 1999 ending by 2012, and so on. How to edit these gauges with their location in WMS to appear as coverages and edit these records and use them in hydrologic modeling, do I have to cut the dates so they have the same start and end dates or no. Best regards
  24. Dear Kyle Thank you so much, I fixed all of that but I still receive this error on saving the HEC-HMS file: Unrecognized time interval (E Part) What that error means and how to fix it? Best regards