elfdata_vahydro: Retrieve data from DEQ VAHydro database and format data for...

In elfgen: Ecological Limit Function Model Generation and Analysis Toolkit

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)

elfgen documentation built on Aug. 23, 2022, 5:07 p.m.