winnow_BCs: Winnow Basin Characteristics

In wfarmer-usgs/PUBAD: Appliles and Analyzes Several Methods for Prediction in Ungaged Basins

Description

The function winnow_BCs removes correlated basin characteristics and aggregate monthly variables to seasonal variables.

Usage

winnow_BCs(BCs, BC.code6.remflg = F)

Arguments

BCs	A data frame of basin characteristics from clean_BCs.R.
BC.code6.remflg	(optional) A logical value indicating if the code-6 variables, those derived from an uncalibrated hydrologic model, should be removed. The defautl is FALSE.

Details

Reads in the "clean" basin characteristics (BCs) produced by clean_BCs.R and then "winnows" them by:

• 1."pre-removing" various highly correlated or unlikely to be useful BCs, including "SITE", "STD", "CDL", forest NLCD variables other than total forest (FORESTNLCD06).

• 2.

  Add a few BCs are combinations of existing BCs, including:

  • (a)July - Jan monthly temperatures (then all other monthly temperatures are removed; annual average is also retained.)

  • (b)Phase of annual cycle of monthly water balance WB (WB5100...) variables, then delete monthly WB variables but retain annual WB variable WB5100_ANN_MM.

  • (c)Combining monthly PPT variables into quarterly (DJF, MAM, JJA, SON)

  • (d)Combining woody and emergent NLCD fractions to a single total wetland fraction; also creating a NLCD total wetland plus NLCD water variable

  • (e)Adding ELEV_RANGE_M_BASIN variable as difference of ELEV_MAX_M_BASIN and ELEV_MIN_M_BASIN

Value

A matrix of basin characteristics, with some removed.

wfarmer-usgs/PUBAD documentation built on May 4, 2019, 5:21 a.m.