User:Jcreer/SMS:GSSHA Model Control

General

• Total time (TOT_TIME) – An integer giving the total duration of the simulation in minutes
• Time step (TIMESTEP) – An integer giving the duration of each time step in the simulation in seconds. The time step must be evenly divisible into 60 seconds (e.g., 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, or 60 seconds).
• Outlet slope (OUTSLOPE) – The slope of the cell containing the watershed outlet. This must be a positive decimal number.

Overland Flow

• ELEVATION dataset –
  • Select –
• Solver(OVERTYPE) –
  • "ADE" – Alternating Direction Explicit method.
  • "ADE-PC" – Alternating Direction Explicit Predictor-Corrector method. Completes most slowly, but is the most robust.
• ROUYGH_EXP –
• INTERCEPTION –
• RETENTION –
• AREA_REDUCTION –

Infiltration

• Infiltration type –
  • "No infiltration" –
  • "Green & Ampt w/ soil moisture redistribution (INF_REDIST)" –
    • Soil moisture depth (SOIL_MOIST_DEPTH) –
    • Top layer depth (TOP_LAYER_DEPTH) –
  • "Green & Ampt multilayer (INF_LAYERED_SOIL)" –
    • Soil moisture depth (SOIL_MOIST_DEPTH) –
  • "Richard's infiltration (INF_RICHARDS)" –
    • Weight (RICHARDS_WEIGHT) –
    • DTHETA MAx (RICHARDS_DTHETA_MAX) –
    • C option (RICHARDS_C_OPTION) –
    • K option (RICHARDS_K_OPTION) –
    • Upper option (RICHARDS_UPPER_OPTION) –
    • Max Iteration (RICHARDS_ITER_MAX) –
    • Max num. cells (MAX_NUMBER_CELLS) –
    • Soil moisture depth (SOIL_MOIST_DEPTH) –

Channel Routing

• Channel routing computation scheme –
  • "No routing" –
  • "Diffusive wave (DIFFUSIVE_WAVE)" –
    • Allow overbank flow (OVERBANK_FLOW) –
    • Allow overland backwater (OVERLAND_BACKWATER) –
    • Outlet head BC (HEAD_BOUND / BOUND_DEPTH) – A decimal value in meters
    • Create hot start file –Turn on to create a hot start file.
    • Start from hot start file –Turn on to specify a hot start file.
    • Soil erosion (SOIL_EROSION) –
      • Sediment porosity (SED_POROSITY) –
      • Water temperature (WATER_TEMP) –
      • Sand size (SAND_SIZE) –
    • Compute containment transport –
      • Decay coefficient (CHAN_DECAY_COEF) –
      • Dispersion coefficient (CHAN_DISP_COEF) –
      • Initial concentration (INIT_CHAN_CONC) –

Output – General

• Dataset write frequency (MAP_FREQ) –
• Hydrograph write frequency (HYD_FREQ) –
• Output units –
  • "English (QOUT_CFS)"
  • "Meters (METRIC)"
• Suppress screen printing (QUIET) –
• Suppress long term simulation printing (SUPER_QUIET) –
• Strict Julian dates (STRICT_JULIAN_DATE) –
• Output contaminants (ALL_CONTAM_OUTPUT) –