2. SUMMA base settings

Recall that a SUMMA Grouped Response Unit (GRU) contains at least one but possibly more Hydrologic Response Units (HRUs).

2.1. basinParamInfo.txt

GRU-level parameters. These control the properties of the aquifer that the HRUs share in certain model setups and the settings for within-GRU routing. The shared aquifer is disabled if all HRUs are modeled as independent soil columns; see setting “settings_summa_connect_HRUs” in the control file. Within-GRU routing is controlled by the model decision subRouting. In the default setup in this workflow, this decision is set to timeDlay which means that within-GRU routing is active. Note that this means that the mizuRoute setting doesBasinRoute should be set to 0 to avoid the water inside a given GRU being routed twice. See:

  • https://summa.readthedocs.io/en/latest/input_output/SUMMA_input/#attribute-and-parameter-files

2.2. localParamInfo.txt

HRU-level parameters. First column is the default value. Second and third columns provide plausible ranges that are currently not used by SUMMA (but must be provided regardless). These columns may be used in the future for built-in parameter sampling or sensitivity analysis. See:

  • https://summa.readthedocs.io/en/latest/input_output/SUMMA_input/#attribute-and-parameter-files

2.3. modelDecisions.txt

Controls the modeling options active within SUMMA. Note that with the current workflow, modeling option qTopmodl for decision groundwatr should not be used, because the required geospatial parameters are not defined. To use the qTopmodl option parameters tan_slope and contourLength must be set to appropriate values for each HRU in the attributes .nc file. As mentioned above, option timeDlay for decision subRouting should not be used at the same time as mizuRoute’s doesBasinRoute option. See:

  • https://summa.readthedocs.io/en/latest/input_output/SUMMA_input/#model-decisions-file

2.4. outputControl.txt

Controls which variables SUMMA writes to the output files. See:

  • https://summa.readthedocs.io/en/latest/input_output/SUMMA_input/#output-control-file

  • https://summa.readthedocs.io/en/latest/input_output/SUMMA_output/

2.5. *.TBL

Contain the lookup tables used for soil parameters (TBL_SOIL_PARM.TBL) and vegetation parameters (TBL_VEGPARM.TBL). Files TBL_GENPARM.TBL and TBL_MPTABLE.TBL are legacy files that are no longer used but still need to be provided.