This report provides results for 30 randomly selected lakes and reservoirs throughout Oregon. The study was part of a larger assessment to describe the status of biological, chemical and habitat conditions in lakes and reservoirs across the United States, the National Lakes Assessment. Assessments of lake conditions in Oregon showed many similarities to lake conditions observed nationally. Poor biological conditions, as measured by plankton assemblages, were observed for 23% of the lakes surveyed in Oregon. Nationally, 22% of lakes showed poor biological conditions. Riparian and shallow water habitat conditions and excessive nutrients were the most common stressors to the biology in Oregon. This same pattern was observed nationally and across the Western United States.
This report provides a summary of data collected as part of the USEPA funded 2007 National Lakes Assessment. As a partnering agency, Oregon Department of Environmental Quality (ODEQ) surveyed 30 randomly selected sites across the state to assess the ecological conditions of Oregonís lakes. Biological, water quality, and physical habitat indicators were used to identify the percent of lakes surveyed in various condition classes.
High Level Indicators of Oregonís Forested Streams
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Water quality and macroinvertebrate conditions were assessed for sites identified as primarily forest land use. We assessed conditions at multiple spatial scales (statewide and basins), as well as across multiple ownership classes (federal, state, private industrial, and private non-industrial).
Coastal Coho Stream Assessment: Summary Report by DEQ (2008)
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This 8-page report summarizes DEQ's assessment of water quality conditions affecting Coho fish populations within the Coastal Coho Evolutionarily Significant Unit (ESU).
Lower Columbia Wadeable Streams Assessment Summary Report (2008)
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This 8-page summary report describes the chemical, physical and biological habitat conditions of Lower Columbia region, in regards to the spawning and rearing of salmonids.
Lower Columbia Wadeable Streams Assessment Report (2008)
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The report describes the chemical, physical and biological habitat conditions of Lower Columbia region, in regards to the spawning and rearing of salmonids.
PREDATOR: Development and use of RIVPACS-type macroinvertebrate models to assess the biotic condition of wadeable Oregon streams (November 2005 models)
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This document outlines the predictive models used to assess macroinvertebrate conditions throughout Oregon. It gives a brief background on predictive models, followed by details of the specific models built for Oregon. Also, examples of data interpretation are provided.
Upper Grande Ronde Basin Section 319 National Monitoring Program Project Summary Report (2007)
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This report describes the monitoring design and results from the Upper Grande Ronde Section 319 National Monitoring Program (NMP) project. Monitoring was conducted by Oregon Department of Environmental Quality (DEQ) from 1993 through 2005.
This report describes the ecological conditions of wadeable, perennial streams throughout Oregon and relates indicators of chemical and physical conditions to the conditions of biological communities. 118 sites were selected randomly.
Detecting Shifts in Macroinvertebrate Assemblage Requirements: Implicating Causes of Impairment in Streams
ODEQ developed two models to assess temperature and fine sediment stress to macroinvertebrate assemblages. We used a weighted averaging approach to determine optimum temperature and sediment conditions for individual macroinvertebrate taxa. Using these optima and a macroinvertebrate sample, we can infer temperature and fine sediment conditions in a stream. These inferences can provide a sense of the level of stress the macroinvertebrate assemblage is under due to temperature and fine sediments.
Accommodating Change of Bacterial Indicators in Long Term Water Quality Datasets. Journal of the American Water Resources Association (JAWRA) 41(1):47-54 (2005)
The State of Oregon adopted a water quality standard based on Escherichia coli (E. coli) in 1996. The objective of this study was to develop a regression relationship between fecal coliform and E. coli.
Oregon Coast Coho Assessment Water Quality Report (2005)
The Water Quality report is DEQís portion of the Oregon Coast Coho(OCC) Assessment. The Water Quality report is part of a larger, interagency and individual agencies reports which are available at the Coastal Coho Assessment web page.
- Section A: Describes the implementation of conservation efforts to restore OCC administered through DEQ's programs. 08-LAB-004 PDF
- Section B: Describes the nature, extent and risk of threats to OCC that were evaluated by DEQ monitoring work: water temperature, dissolved oxygen, stream fertility, fine sediment and substrate, and biological condition. 08-LAB-006 PDF
- Section B: Technical Appendix 08-LAB-005 PDF
Assessment of Thermo Fluids Spill on Macro Invertebrate Communities of Johnson Creek (2004)
The Oregon DEQ Watershed Assessment Section performed an assessment on the benthic community of Johnson Creek following the suppression of a fire at the Thermo Fluids facility in Southeast Portland on March 18th, 2004.
Using field data to estimate the thermal niche of aquatic vertebrates. North American Journal of Fisheries Management 25:346-360 (2004)
This paper uses field data collected throughout Oregon to describe the temperature needs of fish species in different regions. We focus on the maximum temperatures that various fish species (and a few amphibians) can withstand as well as optimal temperatures for fish during critical summer conditions.
Selecting Reference Condition Sites - An Approach for Biological Criteria and Watershed Assessment (2004)
This paper describes the approach the Oregon DEQ Watershed Assessment Section uses to select reference condition sites. The purpose of selecting reference condition sites is to establish an objective and systematic method for finding water bodies minimally disturbed by human activities.
Discussion of Oregon Water Quality Index: A Tool for Evaluating Water Quality Management Effectiveness. Journal of the American Water Resources Association (JAWRA) 38(1):313-314 (2002)
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This report discusses concerns raised by "Oregon Water Quality Index: A Tool for Evaluating Water Quality Management.
Reply to Discussion of Oregon Water Quality Index: A Tool for Evaluating Water Quality Management Effectiveness. Journal of the American Water Resources Association (JAWRA) 38(1):315-318 (2002)
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This report is the authorís response to concerns raised by "Oregon Water Quality Index: A Tool for Evaluating Water Quality Management" .
Oregon Water Quality Index: A tool for Evaluating Water Quality Management Effectiveness. Journal of the American Water Resources Association (JAWRA) 37(1):125-137 (2001)
The Oregon Water Quality Index (OWQI) is a single number that expresses water quality by integrating measurements of eight water quality variables The OWQI improves comprehension of general water quality issues, communicates water quality status, and illustrates the need for and effectiveness of protective practices.
Grande Ronde National Monitoring Program Project Temperature Monitoring Summary Report (2000)
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EThis report summarizes water temperature data collected by DEQ biomonitoring staff at eleven study sites located in the Upper Grande Ronde watershed. Environmental variables related to stream temperature and the effect of stream channel restoration on water temperature are discussed.
A Summary of Chemistry, Temperature, Habitat and Macroinvertebrate Data from the Southeast Oregon Ambient Monitoring Sites (2000)
Oregon DEQ has established a network of ambient water quality monitoring sites throughout the state. This report is a synopsis of current data collected at seventeen ambient monitoring network sites located within the Snake River Basin/High Desert ecoregion of southeast Oregon.
Grande Ronde Section 319 National Monitoring Program Project Fish Survey Report (2000)
This report summarizes methods and results of fish surveys conducted by DEQ biomonitoring staff at Grande Ronde NMP sites from 1994 through 1999.
Upper Deschutes River Basin REMAP Vetebrate Summary (2000)
Results of vertebrate collection activities throughout the Upper Deschutes River basin in 1997-1998. Analyses reveal four distinct fish assemblages based on species composition and environmental factors.
Oregon Plan Fish Summary (1999)
This report summarizes the fish and aquatic vertebrate results collected in the Oregon Coast Range during 1998.
A Preliminary Summary of Oregon Plan and REMAP Temperature Data (1999)
This report summarizes the temperature monitoring completed in the Oregon Coast Range and the Upper Deschutes Basin in Central Oregon.
Aquatic Vertebrate Report (1999)
This report summarizes the vertebrate data collected as part of the Regional Environmental Monitoring and Assessment Program (REMAP) in the Oregon Coast Range. Fish distribution and abundance are described, along with the distribution and abundance of other aquatic vertebrates such as amphibians.
Upper Deschutes River Basin REMAP: Water Chemistry Summary (1999)
The report summarizes the chemical analysis component of the Upper Deschutes Regional Environmental Monitoring and Assessment Program (REMAP) study.
Oregon Coast Range Macroinvertebrate Analysis and Monitoring Status (1999)
This report examines macroinvertebrate data collected from three monitoring programs covering the Oregon Coast Range over the period 1991 to 1997. Its principle objective is to present an overview of biological data currently held by the DEQ Laboratory for this ecoregion.
Analysis of Macroinvertebrate Data from the Grande Ronde Long Term 319 NPS Project (1999)
This report examines macroinvertebrate data collected from the period 1993 to 1996. It is hoped that these initial four years of data collection will satisfy three objectives:
- establish the prevailing biological integrity of each of the study sites;
- examine the effect of seasonal variation on macroinvertebrate data; and
- determine the range in "natural" variability at reference sites
Stream Habitat Index Development and Site Results (1999)
This paper summarizes the physical habitat analysis and consequent Reference Habitat Index (RHI) development.
Winter Storm Turbidity and Biological Integrity of Oregon Coast Streams (1999)
In March of 1997 winter storm turbidity was measured at 27 first through third order streams in the coast ecoregion of Oregon, and compared to the biological integrity scores for the same streams.
Upper Deschutes R-EMAP Temperature Summary (1999)
This report summarizes the 1997 and 1998 temperature data collected for the Regional Environmental Monitoring and Assessment Program (REMAP) located in the upper Deschutes River Basin.
Reference Site Selection: A Six Step Approach for Selecting Reference Sites for Biomonitoring and Stream Evaluation Studies (1999)
Reference sites represent stream condition with minimal human disturbance. These sites provide critical information about natural or attainable stream conditions in different regions of the state.
Benthic evaluation of Oregon rivers (BORIS - A RIVPACS type model) (1999)
This report outlines the methods used to develop Oregonís multivariate model (BORIS) for assessing macroinvertebrate communities.
Multivariate Analysis of Fish and Environmental Factors in the Grande Ronde Basin of Northeastern Oregon (1999)
The report assesses the fish data and habitat data collected from ten tributaries in the Upper Grande Ronde basin from 1993 to 1998. The analysis used a multivariate approach to determine habitat and water chemistry variables that have significant effects on fish communities.