A-F G-M N-R S-Z

AASF: Adopt-A-Stream Foundation

AFDM: Ash-Free Dry Mass

AFDW: Ash-Free Dry Weight

AGP: Algal Growth Potential

AI: Autotrophic Index

ANOVA: Analysis of Variance

APA: Alkaline Phosphatase Activity

B-IBI: Benthic Macroinvertebrate Index of Biological Integrity

BMP: Best Management Practice

BOD: Biochemical Oxygen Demand

BPJ: Best Professional Judgement

BuRec: U.S. Department of the Interior, Bureau of Reclamation

CENR: Committee on Environment and Natural Resources

CE-QUAL-RIV1: Hydrodynamic and Water Quality Model for Streams

CFR: Code of Federal Regulations

CGP: Construction General Permit

CLP: Clean Lakes Program

COE: Corps of Engineers

CPP: Continuing Planning Process

CREP: Conservation Reserve Enhancement Program

CRP: Conservation Reserve Program

CSO: Combined Sewer Overflow

CZARA: Costal Zone Act Reauthorization Amendment

DDT: Dichlorodiphenyltrichloroethane

DEQ: Department of Environmental Quality

DIN: Dissolved Inorganic Nitrogen

DITS: Diatom Index of Trophic Status

DO: Dissolved Oxygen

DOC: Dissolved Organic Carbon

DWPC: Division of Water Pollution Control

ECA: Ecological Community Analysis

ECARP: Environmental Conservation Acreage Reserve Program

EDAS: Ecological Data Application System

EMAP: Environmental Monitoring and Assessment Program

EPT: Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies)

EQIP: Environmental Quality Incentives Program

FGA: Filamentous Green Algae

FIP: Forestry Incentives Program

GIS: Geographical Information Systems

HAB: Harmful Algal Bloom

HBN: Hydrologic Benchmark Network

HSFP: Hydrologic Simulation Project FORTAN

HUC: Hydrologic Unit Code

IBI: Index of Biological Integrity

LDC: Legacy Data Center

MITS: Multimetric Index of Trophic Status

N: Nitrogen

NASQAN: National Stream Quality Accounting Network

NAWQA: National Water-Quality Assessment

NIST: National Institute of Standards and Technology

NOAA: National Oceanic and Atmospheric Association

NPDES: National Pollutant Discharge and Elimination System

NPS: Nonpoint Source

NPSM: Nonpoint Source Model

NRCS: Natural Resources Conservation Service

NSCEP: National Service Center for Environmental Publications

NSS: National Stream Survey

NSWS: National Surface Water Survey

NTU: Nephelometric Turbidity Units

NWIS: National Water Information System

ONRW: Outstanding National Resource Waters

P: Phosphorus

PAR: Photosynthetically-active Radiation

PCS: Permit Compliance System

P/R: Productivity/Respiration

QA: Quality Assurance

QC: Quality Control

QUAL2E: Enhanced Stream Water Quality Model

RAD: Reach Address Database

RCC: River Continuum Concept

RF3: Reach File 3

RTAG: Regional Technical Assistance Groups

SAV: Submerged Aquatic Vegetation

SRP: Soluble Reactive Phosphorus

STORET: Storage and Retrieval

TAB: Total Algal Biomass

TDP: Total Dissolved Phosphorus

THM: trihalomethane

TIA: Total Impervious Area

TKN: Total Kjeldahl Nitrogen

TMDL: Total Maximum Daily Load

TN: Total Nitrogen

TP: Total Phosphorus

TSS: Total Suspended Solids

TVA: Tennessee Valley Authority

TWINSPAN: Two Way Indicator Species Analysis

USGMA: Unweighted Pair Group Method Using Arithmetic Averages

USGS: United States Geologic Survey

VNRP: Voluntary Nutrient Reduction Plan

WASP: Water Analysis Simulation Program

WES: Waterways Experiment Station

WHIP: Wildlife Habitat Incentives Program

WLA: Waste Load Allocation

WQBEL: Water Quality Based Effluent Limits

WQN: Water Quality Networks

WQS: Water Quality Standards

WRS: Wetlands Reserve Program