Clackamas County Water Environment Services Clackamas County Service District #1 Benthic Macroinvertebrate and Geomorphological Monitoring Report 2017
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Clackamas County Water Environment Services Clackamas County Service District #1 Benthic Macroinvertebrate and Geomorphological Monitoring Report 2017 REPORT- June 29, 2018 prepared by TABLE OF CONTENTS 1.0 Introduction ........................................................................................................ 5 1.1 MONITORING NETWORK ............................................................................... 5 1.2 SETTING .................................................................................................................. 6 1.3 PROJECT OBJECTIVES ....................................................................................... 9 2.0 Methods ............................................................................................................ 10 2.1 SITE SELECTION................................................................................................ 10 2.2 GEOMORPHIC MONITORING ..................................................................... 12 2.3 MACROINVERTEBRATE MONITORING.................................................. 17 3.0 Observations and Results ................................................................................. 28 3.1 SITE DESCRIPTIONS ........................................................................................ 28 3.2 DATA SUMMARY ................................................................................................ 46 4.0 Discussion ........................................................................................................ 77 4.1 DISCUSSION OF GEOMORPHIC SURVEY ............................................... 77 4.2 DISCUSSION OF MACROINVERTEBRATE SURVEY ............................ 83 5.0 Recommendations and Conclusions ................................................................ 87 6.0 References ........................................................................................................ 94 Figures Figure 1. Macroinvertebrate and geomorphic survey reaches sampled in Clackamas County (c), Oregon in the fall of 2017. ............................................................................................. 7 Figure 2. Surficial geology and streams in the CCSD #1 Service Area. Modified from Ma, et al. (2012) ................................................................................................................................... 8 Figure 3. Annual peak flow data for CCSD #1 .......................................................................................... 47 Figure 4. Graphical Geomorphic data summary ........................................................................................ 52 Figure 5A. Correlation between geomorphic parameters and percent fines in riverbed sampled from reaches in Clackamas County (CCSD #1), Oregon in the fall of 2017.................................................................................................................................... 53 Clackamas County – CCSD #1 i Aquatic Macroinvertebrate and Geomorphic Monitoring - 2017 Figure 5B. Correlation between geomorphic parameters and percent of eroding bank sampled from reaches in Clackamas County (CCSD #1), Oregon in the fall of 2017.................................................................................................................................... 54 Figure 6. Relationships between multimetric scores and PREDATOR O/E model scores of macroinvertebrate communities sampled from riffles in stream reaches in Clackamas County (CCSD #1), Oregon in the fall of 2017. .......................................... 64 Figure 7. Multimetric scores (top panel) and PREDATOR MWCF O/E scores (bottom panel) of macroinvertebrate communities sampled from riffles in Clackamas County (CCSD #1), Oregon in the fall of 2002, 2007, 2009, 2011, 2014, and 2017. ....................................................................................................................................... 65 Figure 8. Mean multimetric (upper panels) and mean MWCF O/E (bottom panels) scores of macroinvertebrate communities sampled from riffles in Clackamas County (CCSD #1), Oregon in the fall of 2002, 2007, 2009, 2011, 2014, and 2017. Left panels include data from all reach. ............................................................................. 66 Figure 9. Mean multimetric scores of riffles sampled from reaches within three Clackamas County (CCSD # 1) subbasins (Kellogg Creek, n= 2; Mt. Scott Creek, n= 4; and Rock Creek, n= 4), Clackamas River tributaries (n= 2), and the Richardson Creek reach. Samples were collected in the fall of the 2017. ................... 67 Figure 10. Fine sediment stressor model scores (top panel) and temperature stressor scores (bottom panel) of macroinvertebrate communities sampled from riffles in Clackamas County (CCSD #1), Oregon in the fall of 2002, 2007, 2009, 2011, 2014, and 2017. Red lines indicate thresholds above which values indicate a stressed condition. ................................................................................................................ 71 Figure 11. Mean temperature stressor scores (upper panels) and mean fine sediment stressor scores (bottom panels) of macroinvertebrate communities sampled from riffles in Clackamas County (CCSD #1), Oregon in the fall of 2002, 2007, 2009, 2011, 2014, and 2017. ................................................................................................ 73 Figure 12. Relationships between multimetric scores of macroinvertebrate communities sampled from riffles and select environmental variables in Clackamas County (SWMACC: Solid circles and CCSD # 1: Open circles), Oregon in the fall of 2017. ....................................................................................................................................... 75 Figure 13. Relationships between MWCF O/E scores of macroinvertebrate communities sampled from riffles and select environmental variables in Clackamas County (SWMACC: Solid circles and CCSD # 1: Open circles), Oregon in the fall of 2017. ....................................................................................................................................... 76 Figure 14. Correlation between geomorphic parameters and O/E scores sampled from reaches in Clackamas County (CCSD #1), Oregon in the fall of 2017. ...................... 82 Clackamas County – CCSD #1 ii Aquatic Macroinvertebrate and Geomorphic Monitoring - 2017 Tables Table 1. Site information for stream reaches where channel morphology assessment was conducted in Clackamas County Service District #1 (CCSD #1), Oregon. ......................................................... 11 Table 2. Environmental parameters measured in the field to characterize stream reaches in the Clackamas County (CCSD #1), Oregon, in the fall of 2017. ...................................................... 18 Table 3: Metric set and scoring criteria (WQIW 1999) used to assess condition of macroinvertebrate communities sampled from riffles in stream reaches within Clackamas County (CCSD #1), Oregon, in the fall of 2017. ........................................................................................ 23 Table 4. Multimetric score ranges for the assignment of macroinvertebrate community condition levels (WQIW 1999). .......................................................................................................................... 23 Table 5. Metric set used to assess condition of macroinvertebrate communities sampled from glides/pools in Clackamas County (CCSD #1), Oregon in the fall of 2017. ............................ 25 Table 6. Geomorphic data collected in 2017 for long-term monitoring- Clackamas County Service District (CCSD #1), Oregon. ........................................................................................................... 49 Table 7. Channel parameters calculated for each study reach in 2017 - Clackamas County Service District #1 (CCSD #1), Oregon. ..................................................................................................... 50 Table 8. Bed substrate and bank conditions in 2017 for each study reach - Clackamas County Service District #1 (CCSD #1), Oregon. ..................................................................................................... 51 Table 9. Environmental conditions of a lower reach (Cow Creek; M-CO-10), from which glides were sampled and 13 higher-gradient stream reaches in which riffles were sampled for macroinvertebrates in Clackamas County (CCSD #1), Oregon in the fall of 2017. ................ 56 Table 10. Land uses in the drainage basin upstream of monitoring reaches sampled in Clackamas County (CCSD #1), Oregon in the fall of 2017. ........................................................................... 57 Table 11. Habitats from which macroinvertebrate samples were collected in monitoring reaches sampled in Clackamas County (CCSD #1), Oregon in the fall of 2002, 2007, 2009, 2011, 2014, and 2017. ......................................................................................................................... 59 Table 12. Western Oregon multimetric scores and PREDATOR MWCF O/E scores calculated from macroinvertebrate samples collected from riffles in 13 stream reaches in Clackamas County (CCSD #1), Oregon, in the fall of 2017. .......................................................................... 60 Table 13. Multimetric scores calculated for riffle samples collected from stream reaches in Clackamas County (CCSD #1),