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)


[Package elfgen version 2.3.3 Index]