Aquaveo & Water Resources Engineering News

Incorporating Transport Observation Points into a MT3DMS Model

Have you wanted to incorporate the TOB package while running MT3DMS in GMS? We have a workflow that can help with this, as part of building an MT3DMS model in GMS with a conceptual model approach. This post will review how to incorporate transport observation points into your MT3DMS model in GMS.

To do so, use the following steps:

Transport Observatin Package
  1. With your MT3DMS model already open in GMS, right-click the conceptual model and select New Coverage... to create a new coverage and bring up the Coverage Setup dialog.
  2. While in the Coverage Setup dialog, turn on whichever options you want to be observing for in the Obs. Data column of the Observation Points section.
  3. Once done with the Coverage Setup dialog and with a new coverage created, create some points within the coverage.
  4. Using the Select Points\Nodes tool, select the points you have just created, right-click on one of them, and select Attribute Table… to bring up the Attribute Table dialog.
  5. Set the Type drop-down in the All row to obs. pt in the Attribute Table dialog to set the BC type to Observation Points for the points.
  6. Once done with the Attribute Table dialog and with the points set as observation points, right-click the new coverage and select Map To | MODFLOW/MODPATH to map the new coverage to MODFLOW.
  7. Now select MT3DMS | Basic Transport Package… to bring up the Basic Transport Package dialog.
  8. Select the Packages... button to bring up the MT3DMS/RT3D Packages dialog.
  9. Turn on the option for Transport observation package.
  10. Now select MT3DMS | Transport Observation Package... to bring up the Transport Observation Package dialog.
  11. Now you will have the ability to turn on the option to Compute concentrations at observation points and select coverages with concentration observations to be used.

Try out incorporating transport observation points into MT3DMS models in GMS 10.5 today!

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Tips for Using the Measure Tool in WMS

Have you used the Measure tool in WMS? You probably have, but would you like to know more about the tools capabilities? This post will review the capabilities of the Measure tool and give some tips for using it.

The Measure tool allows you to measure distance, slope, and in some cases angles along a path you define. It is designed to give you real-world measurement sizes, and can be useful when the scale of parts of a model aren't immediately apparent. When the tool is selected, you will be able to define a series of line segments along a path. This path can be continually defined until it is terminated by double-clicking. When the path is terminated, it will disappear from the Graphics Window, but along the bottom of WMS, in the Help Message window, the relevant values will be displayed in red text. These will be updated whenever the Measure tool is used, reflecting the most recent path that was defined.

Example of using the Measure tool

The units for distance and slope will depend on the units set by the projection, or by the project defaults, either ft and ft/ft (feet) or m and m/m (meters). It is recommended to make certain you have set the correct units for your project before using the Measure tool.

Angle will only be reported when a line only has two points, whereas distance and slope are always reported. Angle will be measured in radians. Angle will be calculated by measuring an angle starting from a reference line pointing south from the first point, and ending at the line segment defined by the two points.

If you have a TIN or DEM loaded into the project, the Measure tool will be able to get slope values. When the Measure tool is used on an area without elevation data, the slope will be given a value of zero. Slope will be calculated by taking the distance-weighted average of the slopes of all the segments. For each segment, slope will be calculated by dividing the change in elevation across the points by the xy distance of the segment.

The Measure tool can help you build and design your project with accuracy. Try out the Measure tool in WMS 11.1 today!

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