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Found 8 results

  1. Hi, Could you please tell me if a SEWAT model can be calibrated using PEST in GMS? This model was calibrated in the mode of MODFLOW using PEST. However, it does not take the effect of the salinity wedge intruded inland along the coastline (although the GMS set up of this model includes all MODFLOW, MT3DMS and SEWAT and salinity wedge and associated coastline boundary conditions). Using the calibrated hydraulic conductivities, vertical anisotropies and recharge rates, The model was run in SEWAT form but water levels are much higher than the calibration targets now because the salinit
  2. Hi, Could you please tell me if a SEWAT model can be calibrated using PEST in GMS? This model was calibrated in the mode of MODFLOW using PEST. However, it does not take the effect of the salinity wedge intruded inland along the coastline (although the GMS set up of this model includes all MODFLOW, MT3DMS and SEWAT and salinity wedge and associated coastline boundary conditions). Using the calibrated hydraulic conductivities, vertical anisotropies and recharge rates, The model was run in SEWAT form but water levels are much higher than the calibration targets now because the salinit
  3. Hi All, I am trying to calibrate a MODFLOW model using PEST. My model has multiple layers (12). However, I do not know how to parameterize the model. Aquaveo tutorials explain it as specifying hydraulic conductivity and recharge values are negative values in different areas. However, I am not able to do this because my model is developed in such a way that these Hydro-geological properties are specified as a properties of materials and these materials are assigned to different areas in each layer. Would you please help me to parameterize my model? Thank you, Lalith
  4. Hi All, I am trying to calibrate a MODFLOW model using PEST. My model has multiple layers (12). However, I do not know how to parameterize the model. Aquaveo tutorials explain it as specifying hydraulic conductivity and recharge values are negative values in different areas. However, I am not able to do this because my model is developed in such a way that these Hydro-geological properties are specified as a properties of materials and these materials are assigned to different areas in each layer. Would you please help me to parameterize my model? Thank you, Lalith
  5. Hello dear users and the developers, I am having a problem with Transient PEST calibration (GMS version 10.2.3). My model consists of 1 layer UGrid and have boundary conditions of specified head (along the coast, 0) and GHB. I have done several PEST runs with 90 pilot points in steady state condition. It worked and got results. In the calibration window, it was showing the flow of parameters changing, the graph was being drawn. Then, I changed it to 7 years long transient model. The forward transient run with MODFLOW-USG was successfully done. But when it comes to transient PEST calibrati
  6. Hello, For a very long time, I have been trying to create a numerical model of an aquifer with complex hydrogeology (by using borehole-to-Ugrid option). I had several layers of 4 different materials. But all my efforts were trash. Because, I have never obtain a successful Modflow-usg run. They never converged. Although wetting option was on, the aquifer had so many dry cells. And these dry cells were always at same locations (not near/at the location of wells). It was meaningless. I couldn't run the PEST. So I decided to make my system more basic and created a one-layer model with HK zone
  7. Hello everyone! I'm building a multilayer model with GMS (MODFLOW-USG) for a region in Portugal and i start the calibration fase. Can anyone tell me the best way to calibrate my model? I'm thinking about to using the pilot point method, but i cant find a tutorial on how to proceed for calibration of multilayer models... Can anyone help me? Thanks in advance
  8. 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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