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arto

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About arto

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    Geological Survey of Finland
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    GMS, AHGW
  1. arto

    Modflow - modpath

    I have a one grid layer steady state modflow model in gms 10 . When I put one particle at a distance of 100 meters away from the intake well, it entered the well in 70 days with default porosity value of 0.3. Material K value is 0.002 m/s. Then I changed the porosity value to value 0.01 and after running modflow again, GMS informs that particle enters the well in two and a half days. I"m "confused", when there is less amount of effective pores available for ground water to move then GMS tells that water moves faster (from one place to other) ?
  2. arto

    Dry cells

    I have a one grid layer steady state modflow 2005 PCGN model of an esker. The problem is that in the middle of the modeling (esker)area there is a bedrock "outcrop" that arises above groundwater level (or sometimes even above mineral ground surface).Running modfllow creates dry cells on that area. If I have understood right it is not allowed to "flag" those finite difference grid cells (inside modeling area) as "inactive" (IBOUND) or "isolate" them. I´d would be very pleased to know how to deal with that before mentioned situation, where the esker has accumukated over impermeable crystalline
  3. Hi, I don´´ t know if HFB is the right "topic" for my issue: I have a one grid layer steady sytate modflow model of an esker. The problem is that in the middle of modeling (esker)area there is a bedrock outcrop that arises above groundwater level (or sometimes even above mineral ground surface). If I have understood right it is not allowed to "flag" those finite difference grid cells (inside modeling area) as "inactive" (IBOUND) or "isolate" them. I´d woiuld be very pleased to know how to deal with that before mentioned situation, where the esker has accumukated over impermeable crystalline b
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