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T_dudunake

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  1. T_dudunake

    Importing XYZ data and attribute (pressure)

    Hi Michal, Thanks for your response. I actually just have a gridded point dataset. I was wondering if the best option would be to convert it to a raster. Otherwise, if I can keep this dataset as a gridded point dataset, then that's one less data processing step which is fine by me. What I'm modeling here (theoretically) is hyporheic exchange on the surface and subsurface of a stream bed. Once I run MODFLOW I will generate flow paths to visualize the hyporheic exchange. What you see in the above screenshot is one longitudinal section of the entire dataset with three distinct locations which represent a boulder on the surface of the bed. In the full data set, I have surface observations regularly spaced at 5mm with an observed location (XYZ) and a modeled pressure value from a flume for every single observation. Note, it is a complete 3D data set. I am able to bring in this dataset as a shapefile then convert it to a feature object (is this a good next step?). My next big hurdle I'm facing is snapping these observation points to a grid cell center where I want one observation point per grid cell (5mm resolution). Can you provide some insight into how I might do that and then assign each grid cell the respective pressure value for that point?
  2. Hi, I'm relatively new to the GMS software and have performed a few of the basic tutorials Aquaveo provides. I have XYZ data that provides spatial reference to every observed pressure points/head values. These points are evenly spaced/gridded. I would like to create a MODFLOW simulation with these pressure data. To my understanding, the best way about creating this model would be to generate a raster that stores XYZ and P data (GeoTIFF). Theoretically, I'd like to create a 3D grid that stores these X, Y, Z, and P data. From there I'm going to need to create an IBOUND layer that specifies the head based on the P value. I've successfully performed these simulations in 2D space but am unable to comprehend where to start in the 3D space. See the attached screenshot for an example of a longitudinal cross-section of a 2D simulation. Can someone provide me some insight on how to begin setting up this model? Let me know if there are further things I need to clarify.
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