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Versions

If the grid/arc is changed (moved/split/merged) at any boundaries of the Delta, CALSIM → DSM2 preprocess scripts (and DSM2 configuration) should change, i.e., a different version. Some typical keywords are usually used as part of the scenario version name:

  • Existing (EST): Represents the current Delta condition (could change over time).
  • No Action Alternative (NAA): Future scenarios without major grid changes.
  • Proposed Alternative (PA): Future scenarios with major grid changes (e.g., construction).
  • Level of Development (LOD): Represents land use information (e.g., 2005, 2030). Since censuses are infrequent, different scenarios may use the same LOD.
  • Sea Level Rise Projection (SLR): Represents climate change scenarios (e.g., 15cm, 45cm).

Refer to California Water Fix settings of CALSIM and DSM2 (page 70, Table B-8) for examples: Final EIR-EIS Appendix.

Operational changes or constraints usually only affect CALSIM results, not DSM2 settings. Thus, DSM2 preprocess and configuration often remain unchanged. A practical routine is to use the same file name/modifier/path for various scenarios within one version category (modify folder name or use unique names for post-processing).

Commonly Used Versions

  • Original scripts package in DSM2/scripts or vista/scripts/dsm2.
  • CH2M prepared CWF-related EST, NAA, PA, combining LOD and SLR.
  • SWP Delivery Capability Report (DCR), Water Storage Investment Program (WSIP).
  • Widely used versions in DSM2 v806, with updates to DSM2 v812.
  • Recent practice: CALSIM3 to DSM2 in SWP Fingerprinting study (details).