transform.base {RHMS}

base function for class of transform

Description

This function transforms an excess rainfall event to a direct runoff hydorgraph.

Usage

## S3 method for class 'base'
transform(rainfall,transformMethod,transformParams,Area,UH,simulation)

Arguments

rainfall

an object inherited from loss function

transformMethod

a string: the type of transformation method. available types: "SCS", "snyder", and "user". default to "SCS"

transformParams

a list of parameters associated to the selcted type of transformMethod:

• Tlag for "SCS" method

• Ct, Cp, L, and Lc for "snyder" method

Area

the area of drainage basin (Km^2)

UH

a data.frame: must be provided when transformMethod is set to "user". UH is the ordinates of a user defined UH by the which its first collumn is time (Hr) and the second collumn includes flow rates (cms)

simulation

a list of simulation time and dates as below:

• start: the date which simulation starts, must be in 'YYYY-MM-DD' format

• start: the date which simulation ends, must be in 'YYYY-MM-DD' format

• by: the interval of each steps in seconds

Value

Hydrogaph of direct runoff

Author(s)

Rezgar Arabzadeh

See Also

transform