online_rainflo:   RAINFLO©, Rainfall-runoff model
 [Topology]

[Flood hydrology]

[Sample Input]

[Main Page]

[Rationale]

[Description]

[Procedures]

FEATURES

The RAINFLO model has the following distinctive features:

  • Generalized topological structure, which enables it to handle a basin of any order.

  • Three internally defined time steps:

    • the time step of hyetograph definition, equal to 30 minutes,

    • the time step for convolution, equal to the duration of the [watershed] unit hydrograph, and

    • the time step for channel routing, equal to 7.5 minutes.

  • Four NRCS 24-hr type storms: I, IA, II, and III.

  • Three NRCS antecedent moisture conditions (AMC): I, II, and III.

  • Hydrologic abstraction with the NRCS runoff curve number and a φ-index.

  • Automatic reach subdivision for channel routing. The model always runs with a Courant number close to 1, regardless of the input reach lengths.

  • Input comprises:

    1. basin name

    2. run selections

    3. topology

    4. hydrologic data for upland watersheds

    5. hydrologic data for reach watersheds

    6. hydraulic data for channel reaches.

  • Output is the flood hydrograph(s):

    • at the basin outlet, or

    • at all reach outlets.

  • Output includes global mass conservation by comparing total input effective rainfall volume with output flood hydrograph volume at the basin outlet. This helps in locating input errors and assessing the general quality of the run.

  • The free version of the model is capable of running up to six (6) upland watersheds and eleven (11) reach watersheds.

  • At the present time, the model can handle SI (metric) units only. U.S. Customary units is under development.
Thank you for running online_rainflo.