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Loxahatchee River Watershed Restoration Project Performance Measures

Evaluation of Base Conditions and Alternative Plans

The Loxahatchee River Watershed Restoration Project Deliver Team (PDT) utilized the Lower East Coast subRegional Model – North Palm (LECSR-NP) to simulate hydrologic conditions over a 41-year period in southern Martin County and northern Palm Beach County. The modeling results are presented in a series of Performance Measure Graphics (PMGs) that show comparisons of water flows, water levels and related indicators.

The PMGs are organized into 11 categories, then separated by specific basins, canals, water storage facilities and water control structures. As users drill down into the categories, a variety of results (wet, dry or average conditions) for graphic types (stage hydrographs, stage duration curves, water budgets, etc.) will appear. The final level in each category will be a selection of model runs that have been grouped for comparison:

  • Performance Measurement Set #1 – 2014 (current) base condition and 2070FWO (future without project) base condition
  • Performance Measurement Set #5 – 2070FWO, Alternatives 2, 5, 10 and 13

(NOTE: The titles "Performance Measure Sets #2, #3 and #4" were used in prior test simulations and were no longer available to be utilized for the project due to changes in the grouping of alternatives.)

Both Performance Measure Sets #1 and #5 are available below. A total of 21 additional PMGs were added to Performance Measure Set #5 on April 13, 2018. The PDT was notified by email when the update occurred. Performance Measure Set #1 has not changed since the original April 6, 2018 posting.

Please keep in mind that the LECSR-NP is a groundwater model that uses customized add-on packages to simulate surface water conditions. While the model does not specifically route surface water along a specific path such as a canal, it can effectively calculate the movement of groundwater and surface water between multiple points.

Finally, please remember that this modeling is not intended to, and does not, provide absolute results of specific past or future conditions. The modeling results are provided so the PDT and other interested parties can make relative comparisons on the performance of the alternatives.