UKFE (version 1.0.2)

UAF: Urban adjustment factor (UAF) and percentage runoff urban adjustment factor (PRUAF)

Description

UAF and PRUAF from catchment descriptors for QMED estimation in ungauged urban catchments

Usage

UAF(CDs = NULL, URBEXT2000, BFIHOST)

Value

a data.frame with columns UAF and PRUAF

Arguments

CDs

catchment descriptors derived from either GetCDs or CDsXML

URBEXT2000

quantification of catchment urbanisation (used when CDs is not)

BFIHOST

baseflow index as a function of hydrological soil type of the catchment (used when CDs is not)

Author

Anthony Hammond

Details

The urban adjustment factor is to adjust the rural QMED estimates (as estimated using the QMED function) to urban estimates. This is necessary because the QMED equation is calibrated on rural catchments. The assumption is that the magnitude of QMED is impacted by urbanisation and that this impact can be modelled as a function of the catchment descriptors URBEXT and BFIHOST. This UAF function is based on URBEXT2000 and BFIHOST19.

Examples

# Get some catchment descriptors for an urban catchment and calculate the UAF & PRUAF
cds_53006 <- GetCDs(53006)
UAF(cds_53006)

# Calculate UAF and PRUAF using a user input URBEXT2000 and BFIHOST
UAF(URBEXT2000 = 0.1138, BFIHOST = 0.3620)