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USGS · 70209337

Louisiana Adaptive Management Status and Improvement Report: Vision and Recommendations

Bill Boshart·Morgan Crutcher·Angelina Freeman·Edward Haywood·Syed M. Khalil·Summer Langlois·Darin L. Lee·David Lindquist·Tommy E. McGinnis·James Pahl·Carol Parsons-Richards·Erin Plitsch·Rick Raynie·Robert Routon·Leigh Anne Sharp·John Troutman·Chuck Villarrubia·Todd Folse·Alyson Graugnard·Anne Hawes·Russ Joffrion·Wes Leblanc·Brian Lezina·Jim Pahl·Jody White·Craig Conzelmann·Ann Hijuelos·Sarai Piazza·Kathryn A. Spear·Gregory D. Steyer·Nanciann Regalado·John M. Tirpak·Courtney Schupp·Melissa Carle·Jaclyn Daly·Nicolas Eckhardt·Christy Fellas·Erin M. Fougeres·Stephen Heverly·Stacey Horstman·Jason Kroll·Mel Landry·Barbara A. Schroeder·Eric Weissberger·Sara Wissman·Treda Grayson·Patricia Taylor·Danny Wiegand·Mark Defley·Paulina Kolic·Harris Bienn·Tim J. B. Carruthers·Alyssa Dausman·Alaina Grace·Scott Hemmerling·Andrea Jerabek·Eric White·Ryan Clark·Coleen McHugh·Leland C Moss·Cyndhia Ramatchandirane·Amy Wold
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Abstract

As part of the process to increase implementation of adaptive management for ecosystem-based coastal restoration within Louisiana, we aim for this report to be broadly applicable across planning processes as well as funding and implementing entities. It compiles technical knowledge and guidance summarized as key findings through the text which lead to eight priority recommendations to improve application of adaptive management in Louisiana. This report identifies critical linkage points and opportunities for knowledge and data transfers within, and among, agencies in Louisiana. The primary focus is on CPRA and others affiliated with the LA TIG. This report presents a consensus based common vision for adaptive management of coastal restoration implementation in Louisiana. As CPRA is the primary agency responsible for coordinating and facilitating coastal restoration projects within the state of Louisiana, the primary source of information and experience was collated from personnel and processes carried out at CPRA. To capture needs and mechanisms ,across agencies, extensive input was also received from the LA TIG, representing the other state and federal Trustees.

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90° N90° S · 180° W ← longitude → 180° E
Source-reported bounding extent: 28.925011° to 33.019219° latitude; -94.042964° to -88.817017° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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Bill Boshart, Morgan Crutcher, Angelina Freeman, Edward Haywood, Syed M. Khalil, Summer Langlois, Darin L. Lee, David Lindquist, Tommy E. McGinnis, James Pahl, Carol Parsons-Richards, Erin Plitsch, Rick Raynie, Robert Routon, Leigh Anne Sharp, John Troutman, Chuck Villarrubia, Todd Folse, Alyson Graugnard, Anne Hawes, Russ Joffrion, Wes Leblanc, Brian Lezina, Jim Pahl, Jody White, Craig Conzelmann, Ann Hijuelos, Sarai Piazza, Kathryn A. Spear, Gregory D. Steyer, Nanciann Regalado, John M. Tirpak, Courtney Schupp, Melissa Carle, Jaclyn Daly, Nicolas Eckhardt, Christy Fellas, Erin M. Fougeres, Stephen Heverly, Stacey Horstman, Jason Kroll, Mel Landry, Barbara A. Schroeder, Eric Weissberger, Sara Wissman, Treda Grayson, Patricia Taylor, Danny Wiegand, Mark Defley, Paulina Kolic, Harris Bienn, Tim J. B. Carruthers, Alyssa Dausman, Alaina Grace, Scott Hemmerling, Andrea Jerabek, Eric White, Ryan Clark, Coleen McHugh, Leland C Moss, Cyndhia Ramatchandirane, Amy Wold. 2020. Louisiana Adaptive Management Status and Improvement Report: Vision and Recommendations. https://pubs.usgs.gov/publication/70209337

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Factors affecting benthic macroinvertebrate health in the City of Roanoke, Virginia, 2020–2023

Major waterways in the City of Roanoke (City) have failed to meet Virginia’s aquatic life designated use since 1996. Segments of the upper Roanoke River lack healthy benthic macroinvertebrate communities which prompted a total maximum daily load (TMDL) study by the Virginia Department of Environmental Quality (VDEQ) to identify the most probable stressor(s) causing the impairment. Excess fine sediment was identified as the most probable stressor impairing benthic macroinvertebrates on portions of the Roanoke River in 2006, and a watershed implementation plan published in 2016 required communities within the impaired watershed to implement projects that would reduce the load of fine sediment entering the Roanoke River. Additional benthic macroinvertebrate sampling and stream habitat assessments along the Roanoke River and Tinker Creek (a tributary to the Roanoke River that flows through the City) revealed continued impaired conditions, and subsequent stressor identification analysis was completed in 2023. Samples collected downstream of the City on the Roanoke River and Tinker Creek generally showed more impaired conditions relative to samples collected at locations upstream of the City. Based on this evaluation, sediment and sediment-bound polychlorinated biphenyls (PCBs) were identified as probable stressors while specific conductance, total nitrogen, and sediment metals were possible stressors in Tinker Creek; however, only a sediment TMDL target was identified to address impaired benthic macroinvertebrate communities. In the Roanoke River upstream of the Niagara Dam, sediment and total phosphorus were identified as probable stressors, sediment polycyclic aromatic hydrocarbons and sediment PCB were considered possible stressors; however, the TMDL target was only for total phosphorus. The City partnered with the U.S. Geological Survey (USGS) in 2016 to continuously monitor water quality and streamflow conditions on a major tributary of Tinker Creek, Lick Run, and by 2020, four similar monitoring stations were installed on the Roanoke River and Tinker Creek near the locations of benthic macroinvertebrate sampling. Monitored parameters included streamflow and/or gage height (water level), water temperature, pH, dissolved oxygen, specific conductance, and turbidity. Turbidity is a measure of the relative clarity of the water and was previously used to model suspended-sediment concentrations at the monitoring stations. The City also contracted Kirk Environmental, LLP (KE) to collect benthic macroinvertebrate samples and stream habitat assessments near the locations of the water-quality monitoring stations. Identified benthic macroinvertebrates were used to calculate the Virginia Stream Condition Index (SCI), a multi-metric index composed of eight biological attributes that represent elements of the structure and function of the benthic macroinvertebrate community that measure diversity, composition, and tolerance to pollution. Study objective: In this report, benthic macroinvertebrate samples and stream habitat assessment scores collected at four locations on the Roanoke River and Tinker Creek by KE and the VDEQ between 2020 and 2023 were compared to measured water-quality and streamflow conditions prior to sampling to evaluate patterns between benthic macroinvertebrate health, water quality, and hydrology.

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