NRSA_EPA7 {spsurvey}

NRSA EPA7 data

Description

An sf POINT object of 353 stream segments in the Central United States during the years 2008 and 2013, from a subset of the Environmental Protection Agency's "National Rivers and Streams Assessment."

Usage

NRSA_EPA7

Format

353 rows and 10 variables:

SITE_ID

A unique site identifier.

YEAR

Year of design cycle.

WEIGHT

Sampling design weights.

ECOREGION

Ecoregion.

STATE

State name.

BMMI

Benthic MMI value.

BMMI_COND

Benthic MMI categories.

PHOS_COND

Phosphorus condition categories.

NITR_COND

Nitrogen condition categories.

geometry

POINT geometry using the NAD83 / Conus Albers coordinate reference system (EPSG: 5070).