elfdata_vahydro {elfgen}

R Documentation

Retrieve data from DEQ VAHydro database and format data for ELF generation. Contact Virginia DEQ Office of Water Supply to request access to the VAHydro database.

Description

Given a set of VAHydro input parameters, outputs a dataframe of flow metric and richness metric data for hydrologic unit supplied

Usage

elfdata_vahydro(
  watershed.code,
  watershed.bundle,
  watershed.ftype,
  x.metric,
  y.metric,
  y.sampres,
  datasite,
  EDAS.localpath = tempdir()
)

Arguments

watershed.code	Hydrologic unit code, either HUC6, HUC8, HUC10, or HUC12 (e.g. HUC10 code '0208020101').
watershed.bundle	dH bundle of hydrologic unit
watershed.ftype	dH ftype of hydrologic unit
x.metric	x-metric, i.e. streamflow or drainage area
y.metric	y-metric, most commonly species richness
y.sampres	Sample resolution of y.metric (e.g. 'species')
datasite	VAHydro database URL
EDAS.localpath	Local file path for storing downloaded EDAS data. Defaults to a temp directory.

Value

A dataframe of sites containing species richness data (NT Total values) and mean annual flow (MAF) data.

Examples

# We don't run this example by R CMD check, because it takes >10s

# Retrieve dataset of interest
watershed.df <- elfdata_vahydro(
   'nhd_huc8_02080201',
   'watershed',
   'nhd_huc8',
   'nhdp_drainage_sqmi',
   'aqbio_nt_total',
   'species'
   )
elfdata_vahydro(watershed.df)

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