• Exporting Cross-Sections


    I'm trying to export cross sections of a 3D model to put into a report and struggling to get a good result. Is there a way I can take the entire cross-section, zero isoline, fringes, and all, and export into a nice shp file or similar? I've tried right clicking on the components in the "view component" tab and exporting but not getting the result I want. what I would like to get would be no different than a screen shot (without taking a screenshot and having to edit it in paint).

  • Re: Fluid Transfer BC or Hydraulic Head BC?

    Hi Drake,

    "Considering your stream/ditch is ephemeral (dries up), and overlies clay, is it necessary to assign boundary conditions to it?  It seem it would not contribute significantly to recharge or discharge and mostly just handle runoff. Especially if the ditch was lined with some form of membrane or geotextile."

    The issue here is that the "clay" or alluvial clay as I called it geotechnically behaves as a CL/CI however, particle analysis indicates 50-60% silt and even up to 22% sand. Falling head tests have indicated K values of 7e-6 m/s to 2e-6 m/s, so it will seep and transmit water. also the ditch is just a ditch, no special geotechnical liner or anything in place just straight contact to the soils. Having said that I believe this seep is very local to the ditch and I just happen to have a monitoring well that picked it up...

    "I will also keep an eye out for definition of D for you, but suspect it has something to do with thickness since that is what D is frequently used for if I recall."

    D is thickness of the conductance layer. the equation is conductance=hydraulic conductivity/thickness.
  • Fluid Transfer BC or Hydraulic Head BC?


    I have a bit of what I'm going to call an unusual situation (or maybe it's more usual and I've just never experienced it prior)... I have a model where my initial head is highest in the middle with general topography sloping to the west (left side of the model). The only reason I can figure to be causing this initial head condition is the fact that there is a relatively shallow ditch the runs through that area that doesn't drain adequately, there is typically ~60 cm of water (from spring run off) in it until mid summer until it dries out. I believe this ditch is influencing the very local groundwater conditions in the spring.

    I am trying to figure out which boundary condition is best suited for this. Typically in rivers, etc... I would expect to use a cauchy boundary (in feflow a transfer boundary). however, I am newer to modelling and do not have a bunch of experience with this boundary condition. I understand that the difference for the model is that I have to calculate my in transfer rate (conductance layer) which is an easy enough calculation where:


    however, where I am getting a little hung up is the value of D in the model. is it the thickness of the model layer? say 2m (if that's the distance between slice 1 and 2 is 2m?) or is it some arbitrary made up value that I just pick? for this ditch I suspect there really isn't much of a conductance layer though it's mostly just stagnant evaporating water that is sitting on the same surrounding soils. Also I might add that the ditch itself is just a surface feature in the model i.e. I just have it following slice 1 as a dip in elevation.

    Stratigraphy wise I know the area reasonably well and have a monitoring well located almost adjacent to the ditch the stratigraphy is as follows: low-intermediate plasticity clay overlying high plasticity clay.

    What do you feel would be the best condition to use?
  • Re: 2D Time Variant Recharge

    Hi Bjorn, attached is a very simplified version of the model incl. boundary conditions and obs points. for recharge, I have exact dates and rainfall amounts that I'd like to incorporate.

  • Re: 2D Time Variant Recharge

    Hi Bjorn,

    Unfortunately, I am unable to get technical support as the license for our software was never renewed for the technical support... so I am forced to look around online... If it would help I could attach a image of my basic model with what I am attempting to do.
  • 2D Time Variant Recharge

    Hi all,

    I've seen a few recent posts discussing recharge but none seem to match what I am looking for. I have a 2D Vertical Transient Model that is otherwise calibrated, however, I am having an issue with recharge for the model. I've gone through the tutorial and am a little confused on how to  implement recharge into the model.

    Typically, I would use a fluid flux boundary however, it seems that FeFlow is not able to link a fluid flux boundary to a time series with data... So I determined that the inflow/outflow material settings is the next step (despite my confusion as to why recharge would be a material property????), however I cannot seem to link it to transient data (I realize that I can assign it to dates and times but cannot assign the actual recharge rates), the tutorial uses a shapefile that gets imported into the maps area, but I do not quite understand how I can incorporate a shapefile where each event is a polygon over a small 2D area... Is there a simple way to incorporate recharge as rain events into my model from the top layer using a time series??

  • Initial head inputs

    I'm trying to figure out the best way to input some initial heads within a 2D cross sectional model. within the model I have the 3 monitoring wells that indicate a static head level, however I am struggling with how to input the initial head. I understand that it needs to be input at time step 0, so I have my remaining boundaries beginning at time step 0.1 and my initial time step ending at 0.1. However I cannot seem to figure out how to give each monitoring well it's own initial head to extrapolate along the model as they are quite different. What would be the best way to go about doing this?

  • Re: 2D feflow model creation issue


    I was able to resolve the issue, however, prior to this I actually did the tutorial and in my case didn't find it all that helpful as it seems my project is substantially different (how to input various things isn't the same 2D vs 3D, etc...).

    I appreciate the response though!

  • 2D feflow model creation issue


    I am new to using FEFlow 7.0 and am having some difficulties achieving what I want to achieve.... I have quite a bit of experience with MODFlow so I know what I want to do but just don't know how to do it...

    I am attempting to create a 2D model with actual surface elevations over the area but can't seem to get my actual elevations to show up on the model. What is the best way to do this? I have access to arcmap and lidar data for the area, as well as gps survey of 4 monitoring wells along a transect. I have created points every 1 m with xyz coordinates along the transect. I know my y coordinate would not be necessary in a 2D model so after I remove the Y coord. I cannot seem to import my csv or xls file.

    Can anyone offer me some advice on how to proceed?