ADT Average Daily Traffic

AES Atmospheric Environment Services (Canada)

AGU American Geophysical Union

Al Aluminum

AM/FM Automated Mapping/Facilities Management

Amer. American

ANSI Area of Natural Significant Interest/American National Standards Institute

AOC Area Of Concern

ARCS Assessment and Remediation of Contaminated Sediment

AS asphalt

As Arsenic

ASCII American Standard Code for Information Interchange

ASCE American Society of Civil Engineers

ASEE American Society of Engineering Education

Assoc. Association

ATC Artificial trapezoidal channel

AWMA Air and Waste Management Association

AWRA American Water Resources Association

AWWA American Waterworks Association

BACT Best Available Control Technology

BBS Bulletin Board System

BMPs Best Management Practices

BMM Best Management Model

BOD Biological Oxygen Demand

Bull. Bulletin

C $ Canadian dollars

ca Circa, about, approximately

CAD Computer Aided Design/ Drafting

CAE Computer Aided Engineering

Can. Canadian

CAPPI Constant Altitude Precipitation Index maps

CBOD Carbonaceous Biochemical Oxygen Demand

CDF Centralized Detention Facility; Cumulative Density Function

Cd Cadmium

Cdn Canadian currency

CDROM Compact Disk Read Only Memory

CEAM Center for Exposure Assessment Modeling

CF Continuous Flow

CFF Confined Filtration Facility

cfs Cubic Feet per Second

1 cfs = 4.719x10-4m3/s

Chap. Chapter

CHy WMO Commission for Hydrology

Cl Chlorine /Chloride

CMC Central Microcomputer Controller

CN Curve Number in SCS method

COD Chemical Oxygen Demand

COWAR Commitee on Water Research

CP Concrete paver

CPU Central Processing Unit

Cr Chromium

CRL Communications Research Laboratory

CSCE Canadian Society of Civil Engineers

CSIR Council for Scientific and Industrial Research

CSO Combined Sewer Overflow

CST Central Standard Time

Cu Copper

CWA Clean Water Act (U.S.)

CWQG Canadian Water Quality Guidelines

CWRA Canadian Water Resources Association

CWWTP Central Wastewater Treatment Plant

DDE Dynamic Data Exchange

DEC Department of Environmental Conservation

DEIS Draft Environmental Impact Statement

DEM Digital Elevation Model

Dept. Department

DEP Department of Environmental Protection

DEQ Department of Environmental Quality

DER Department of Environmental Resources

DFO Dept. of Fisheries and Oceans

DNR Department of Natural Resources

DNRC Department of Natural Resources and Conservation

DO Dissolved Oxygen

DOC Department of Conservation

DPD n-diethyl-e-phenylenediamine

DPD method Analytical method for determining chlorine residual utilizing the reagent DPD

DRO Direct Runoff Hydrograph

DS Dissolved Solids

DWF Dry Weather Flow

DXF Drawing Exchange File

E. coli. Escherichia coli.

EA Environmental Assessment

EAs Exposure Assessments

EBB Electronic Bulletin Board

ECD Electron Capture Detector

EIC Engineering Institute of Canada

EIS Environmental Impact Statement

EMAIL Electronic Mail

EMAP Environmental Monitoring and Assessment Program

EMC Event Mean Concentration

Eng'rg Engineering

EPA Environmental Protection Agency

EPRI Energy Production Research Institute

EPS Environmental Protection Service

ERL Environmental Research Laboratory

ESA Environmentally Sensitive Area

ESR Equivalent Solids Reservoir

ESRI Environmental Systems Research Institute

EST Eastern Standard Time

ET Evapotranspiration

EV Extreme Value

FAO Food and Agriculture Organization (of the UN)

FC Faecal Coliform

FDRP Flood Damage Reduction Program

Fe Iron

FEMA Federal Emergency Management Agency

FERC Federal Energy Regulatory Commission

FHWA Federal Highway Administration

FLUCS Florida Land Use Classification System

FS Fecal Stretococci

FTU Formazin Turbidity Unit

FWS Free Water Surface

FY Fiscal Year

FYI For Your Information

GC Gas Chromatography

GDS Graphic Data System

GEWEX Global Energy and Water Cycle Experiment

GIS Geographic Information System

gpm Gallons Per Minute

GRU Grouped Response Unit

GUI Graphical User Interface

ha Hectares

HCB Hexachlorobenzene

HEC Hydrologic Engineering Center

(U.S. Army Corps of Engineers)

HGF Hydraulic Gradeline Factor

HPC Heterotrophic Plate Count

HQ Headquarters

HRT Hydraulic Retention Time

HRU Homogeneous Response Unit

HSI Habitat Suitability Indices

HSIA Hydraulically Significant Imper- vious Area

HWL High Water Level

I/O Input/Output

IAHR International Association for Hydraulic Research

IAHS International Association of Hydrological Sciences

IAMAP International Asociation of Meteorology and Atmospheric Physics

IAWPRC International Association for Water Pollution Research and Control

IAWQ International Association on Water Quality

IBM International Business Machines

ICID International Commission on Irrigation and Drainage

IDF Intensity-Duration-Frequency curves

IEEE Inst. of Electrical and Electronic Engineering

IETD Inter-Event Time Definition

IFIM Instream Flow Incremental Methodology

IHD International Hydrological Decade

IHP International Hydrological Program

IJC International Joint Commission

IN Indicated Number

INAA Instrumental Neutron Activation Analysis

Inst. Institute

Int. International

IRAP Industrial Research Assistance Program (Canada)

IUGS International Union of Geological Sciences

IWRA International Water Resources Association

J. Journal

JTU Jackson Turbidity Unit

LAER Lowest Achievable Emission Rate

LAN Local Area Network

LANDSAT Satellite Imagery for Geograph- ical Information

LBIS Land Based Information System

LPD liters per day

LWL Low Water Level

m Metres

m3 Cubic Metres

MAB Man and the Biosphere Program

mcf Million Cubic Feet

MCLs Maximum Contaminant Levels

MDP Master Drainage Plan

M.E. Master of Engineering

Mg Magnesium

MGD Million Gallons per Day

MH Maintenance Hatch (Manhole)

MINTEQA2 Metal Speciation for Equilibrium for Surface- and Ground-water

MIPS Million Instruction Sets Per Second

MISA Municipal/Industrial Strategy for Abatement (Canada)

MMI Man-Machine Interface

Mn Manganese

MNR Ontario Ministry of Natural Resources

M.O. Microorganisms

MOE Ontario Ministry of the Environ- ment (See MOEE)

MOEE Ontario Ministry of Environment and Energy (replaces MOE)

MPN Most Probable Number

MRI Mean Recurrence Interval

MS Mass Spectrometry

M.Sc. Master of Science

MSL Mean Sea Level

MSD Mass Spectrometry Detector

MSS Multi Spectral Scanner

MTC Ontario Ministry of Transporta- tion and Communication

MTO now MTC (see above)

MTP Main Treatment Plant

Na Sodium

NAPP National Aerial Photography Program

NCDC National Climatic Data Center

NGO Non-Governmental Organization

NHAP National High Altitude Photo- graphy

Ni nickel

NITR nitrate plus nitrite

NNN Nitrate/Nitrite Nitrogen

No. Number

NOAA National Oceanographic and Atmospheric Administration

NOD Nitrogenous Oxygen Demand

NPD Nitrogen-Phosphorus Detector

NPDES National Pollution Discharge Elimination System (U.S.)

NPS Non Point Source

NRCC Northeast Regional Climate Center; National Research Council for Canada

NTIS National Technical Information Service (U.S.)

NTU Nephelometric turbidity unit

NURP Nationwide Urban Runoff Program (U.S.)

NWRI National Water Research Institute (Canada)

NWS National Weather Service (U.S.)

O&M Operation and Maintenance

OLE Object Linking & Embedding

OP Organophosphorus

ORD Office of Research and Development

OW Office of Water

p. Page

P Phosphorus

PAH Polycyclic-Aromatic-Hydro-

carbons; Polynuclear Aromatic Hydrocarbons

Pb Lead

PC Personal Computer

PCB Polychlorinated Biphenyl

PCP Pollution Control Planning / Pollution Control Plant

PDE Partial Differential Equation

pdf's Probability Density Functions

PDM Probabilistic Dilution Model

PF Plug Flow

PFPT Peak Flow Presentation Table

pH Negative Log of Hydrogen Ion Concentration

Ph.D. Doctor of Philosophy

PHC Petroleum Hydrocarbons

Phys. Physics

PLC Programmable Logic Controller

PLUARG Pollution from Land Use Activities Reference Group

pp Pages

PP Permanent Pools

Proc. Proceedings

PSD Power Spectral Density

pub. Published

PWQMN Provincial Water Quality Monitoring Network (Canada)

PWQO Provincial Water Quality Objectives (Canada)

QA/QC Quality Assurance/Quality Control

R&D Research and Development

RACT Reasonably Available Control Technology

R/LPOLY Right/Left Polygon

RAP Remedial Action Plan

RDMS Relational Database Manage- ment System

RFA Rainfall Accumulation Map

ROW Right of Way

RTC Real Time Control

RTCDEMO Real Time Control Demonstra- tion

RTCSIM Real Time Control Simulation

RTU Remote Telemetery Unit

SCADA Supervisory Control and Data Acquisition (system)

SCOWAR Scientific Committee on Water Research

SCS USDA Soil Conservation Service

SFS Subsurface Flow System

SI Suitability Index

Soc. Society

SOD Sediment Oxygen Demand

SO4 Sulphate

SPDES State Pollutant Discharge Elimination System

SPM Storage Pumping Model

SQL Structured Query Language

SS Suspended Solids

SSES Sewer System Evaluation Surveys

STN Scientific and Technical Information

STORET Storage and Retrieval of US Waterways Parametric Data

STP Sewage Treatment Plant

SUNY State University of New York

SYMAP Synagraphic Mapping

TBRG Tipping Bucket Rain/Runoff Gage

TC Total carbon (incl. organic & inorganic)

TDS Total Dissolved Solids

TF Transfer Function

THOD Theoretical Oxygen Demand

TIC Total Inorganic Carbon

TIN Triangulated Irregular Network

TKN Total Kjeldahl Nitrogen

TM Thematic Mapper

TN Total Nitrogen

TOC Total Organic Carbon

TOD Total Oxygen Demand

TP Total Phosphorus

Trans. Transactions

TSI Trophic State Indices

TSS Total Suspended Solids

TVS Total Volatile Solids

U. University

UAA Use Attainability Analysis

UN United Nations

UNCED United Nations Commission on Environment and Development

UNDP United Nations Development Program

UNEP United Nations Environment Program

UNESCO United Nations Education Scientific and Cultural Organisation

UNIDO United Nations Industrial Development Organization

UNIX A general purpose time-sharing operating system. Trademark of Bell Laboratories.

US $ United States dollars

USACE United States Army Corps of Engineers

USDA United States Department of Agriculture

USEPA United States Environmental Protection Agency

USCS Unified Soil Classification System

USGPM US Gallons Per Minute

USGS United States Geological Survey

UST Underground Storage Tank

UTM Universal Transverse Mercator

UWRC Urban Water Resources Council (A.S.C.E.)

UZS Upper Zone Storage

V Vanadium

VDU Visual Display Unit

VOC Volatile Organic Compound

Vol. Volume

VSS Volatile Suspended Sediment

VTOC Volatile Toxic Organic Compounds

WAN Wide Area Network

WHO World Health Organization

WMO World Meteorological Organization

WMP Watershed Management Plans

WPCP Water Pollution Control Plant

WQA Water Quality Act of 1987 (Canada).

WSC Water Survey of Canada

WSEL Water Surface Elevation Level

WSI Western Sanitary Interceptor

WSM Watershed Model

WTP Water Treatment Plant

WUA Weighted Usable Area

WWT Wastewater Treatment

WWTP Wastewater Treatment Plant

WYSIWYG What You See Is What You Get

Zn Zinc

ZUM Zones of Uniform Meteorology

30Q20 The average streamflow over a

30-day period which is equalled/ exceeded on average once in every 20 yrs.

7Q20 The average streamflow over a

7-day period which is equalled/ exceeded on average once in every 20 yrs.