Review of the Inland Estimated Recovery System Potential (ERSP) Prototype Calculator (2022) / Chapter Skim
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Appendix B: USCG Inland ERSP Calculator Software Issues
Appendix B: USCG Inland ERSP Calculator Software Issues
Pages 37-49
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From page 37... ...
COMPATIBILITY The calculator is not compatible with the Apple operating system, which limited the committee members who were able to use the calculator. SPILL VOLUME Despite the ability to enter a spill volume, the daily ERSP output is constant from 1 to 999 bbl, 1,000 to 99,999 bbl, and 100,000 and greater bbl.
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From page 38... ...
Review of the Inland Estimated Recovery System Potential (ERSP) Prototype Calculator 38
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From page 39... ...
Appendix B SKIMMER SELECTION The software requires that a Stationary/Advancing/Self-Propelled Skimmer be selected to perform calculations. Selection of an Advancing Skimmer or Stationary Skimmer results in an error message.
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From page 40... ...
Those remain tied to the Stationary/Advancing/Self-Propelled Skimmer that was selected. Note that while the Elastec TDS 118G Drum Skimmer appears to be selected, the Throughput and Recovery efficiencies remain tied to the Minimax 12 W that had previously been selected.
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From page 41... ...
At first look, it appears that any value entered into the Throughput Efficiency is used in the calculation, independent of the skimmer selection. However, the next panel shows that one can remove the Throughput Efficiency and the calculator will run using the last value that had been in that block.
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From page 42... ...
This issue also occurs with the Planning Volume Classification and Spill Volume. The calculator appears to take whatever was last entered in the Spill Volume.
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From page 43... ...
This is more of a nuisance than an issue in the model, potentially confounding a user's interpretation of the calculator's results.
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From page 44... ...
CONTINUOUS RELEASE In the run below, the ERSP total is 1,000 bbl even though the release was 1,000/bbl per day for 2 days and the results indicated more than 1,000 bbl recovered.
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This speed exceeds any vessel or ability to put boom in a current.
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From page 46... ...
CUSTOMIZATION MODULE B In the scenario below, the ERSP exceeds the amount spilled. However, the results indicate that it will be 57 hours until no more oil will be available to recover.
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Surprisingly, the stagnant case, where the shoreline type is expected to retain more oil, is the one with the higher recovery. This is likely a result of the differences in the weather models used to determine thickness.
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From page 48... ...
This error occurred whenever stagnant flow was used and Module A was activated. This may be because of the limited shoreline cases run for the stagnant flow scenario.
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From page 49... ...
Appendix B 49
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