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arto

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    Geological Survey of Finland
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    GMS, AHGW

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  1. arto

    Modflow - modpath

    Thank You very much Rob ! Because I´m a geologist then I´m thinking effective porosity "purely" as a material dependent phenomena (eg. gravel 0.3, clay 0.0001). You "opened my eyes" to figure out "what´s going on" (= keep hydraulic conductivity the same), Thank You.
  2. 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) ?
  3. 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 berdrock and the bedrock surface arises locally above adjacent esker´s groundwater level (or even outcrops) in the middle of the esker.( = in the middle/or centre of the modeling area) ?
  4. 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 berdrock and the bedrock surface arises above adjacent esker´s groundwater level (or even outcrops) in the middle of the esker.( = in the middle/or centre of the modeling area) ?
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