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Articles 1441 - 1470 of 16422

Full-Text Articles in Physical Sciences and Mathematics

Interactive Threats Reduce Foraging And Prey Capture Effort By Endangered Killer Whales, Dr. Marla Holt Apr 2022

Interactive Threats Reduce Foraging And Prey Capture Effort By Endangered Killer Whales, Dr. Marla Holt

Salish Sea Ecosystem Conference

Vessel traffic is a global threat to many marine mammals. Vessels can strike individuals, introduce pollutants, disrupt behavior, and generate noise. Moreover, marine mammals face other threats such as altered prey fields due to anthropogenic factors (e.g. habitat, fisheries, climate change). However, there is often uncertainty regarding what aspects of these threats create the greatest risks given difficulties of studying marine mammal behavior. Here, we use high-resolution animal-borne Dtags to study the behavioral ecology of endangered Southern Resident killer whales (SRKW) that rely on biosonar to hunt Pacific salmon and investigate how proximate vessels affect foraging behavior and outcomes. We …

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The Variety And Value Of Grassroots, Ground-Up Recovery Efforts, Jess Newley, Donna Sandstrom, Dr. Frances Robertson, Susie Washington-Smyth, Jessica Scott Apr 2022

The Variety And Value Of Grassroots, Ground-Up Recovery Efforts, Jess Newley, Donna Sandstrom, Dr. Frances Robertson, Susie Washington-Smyth, Jessica Scott

Salish Sea Ecosystem Conference

The endangered status of the southern resident killer whale population and the likelihood of further human growth and development around the Salish Sea both indicate that the population’s recovery will be a daunting, long-term challenge to Canadian and U.S. governments and First Nation Tribes. Communities and non-governmental organizations presently have, and will continue to have, a vital role to play in contributing to the collective effort to provide the whales a quieter, less disruptive Salish Sea to successfully forage, communicate, socialize and raise their calves. For this panel, presenters will describe some of the activities currently underway to reach the …

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Region-Wide Declines In Size At Age For Bc Chinook Salmon: Trends And Causes In Space And Time., Dr. Ravi Maharaj Apr 2022

Region-Wide Declines In Size At Age For Bc Chinook Salmon: Trends And Causes In Space And Time., Dr. Ravi Maharaj

Salish Sea Ecosystem Conference

Declines in the size-at-age of Chinook salmon have been observed across the Pacific Northwest. Reasons for these declines are not well understood, though a number of potential causal factors have been highlighted. Here we present an analysis of size-at-age trends for BC Chinook escapements, testing the possible effects of some of these factors including hatchery influence, fishing, ocean conditions and predation among others. This project is part of a broader review of hatchery effectiveness being conducted by the Pacific Salmon Foundation.

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Projecting Future Climate States For The Salish Sea In Support Of The Management Of Local Ecosystems And Fisheries, Dr. Amber Holdsworth Apr 2022

Projecting Future Climate States For The Salish Sea In Support Of The Management Of Local Ecosystems And Fisheries, Dr. Amber Holdsworth

Salish Sea Ecosystem Conference

Projections of the future ocean state for Canada’s Salish Sea are necessary to understand the effects of climate change on ecosystems, fisheries, and aquaculture providing critical information on likely future conditions and the ability to adaptively manage fisheries resources, ecosystems and significant areas. A multi-stage downscaling system is under development to improve our understanding of climate impacts for the Salish Sea and to generate actionable climate data for decision makers. Climate models are global and, therefore, are restricted to coarse resolutions on the order of 100km. The narrow straits and channels and complex bathymetry of the Salish Sea are modelled …

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Oceanographic Conditions And Harmful Algae In The Strait Of Georgia, Canada – Outcomes Of Seven Years Of Monitoring With The Citizen Science Program., Svetlana Esenkolova Apr 2022

Oceanographic Conditions And Harmful Algae In The Strait Of Georgia, Canada – Outcomes Of Seven Years Of Monitoring With The Citizen Science Program., Svetlana Esenkolova

Salish Sea Ecosystem Conference

The Pacific Salmon Foundation’s Citizen Science Oceanography Program was started in 2015, with assistance from Fisheries and Oceans Canada (DFO) and Ocean Networks Canada (ONC). The purpose of this innovative program is to obtain high-resolution data on oceanographic conditions and lower trophic levels that can be used to assess conditions relevant to juvenile salmon survival in the Salish Sea. Sampling occurs at 50-80 sites, about 20 times a year from February to October, resulting in ~1500 oceanographic stations each year, which are archived at ONC and the Strait of Georgia Data Centre. Analysis of oceanographic conditions (temperature, salinity, dissolved oxygen, …

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Phase 2 Development Of A Hydrologic Condition Index For The Puget Sound Basin, Colin Hume Apr 2022

Phase 2 Development Of A Hydrologic Condition Index For The Puget Sound Basin, Colin Hume

Salish Sea Ecosystem Conference

The Department of Ecology is developing a Hydrologic Condition Index (HCI) for the Puget Sound Basin. Building on the Puget Sound Watershed Characterization broad-scale indices of watershed processes, the HCI will further the multi-scale decision support framework established to assist local governments and natural resource practitioners in land use, stormwater, salmon recovery, and other watershed based planning processes. Building off of an initial concept from King County, Phase 1 development of the HCI established preferred methodologies for calculating the index, validated the index with stream gage measured high-pulse-counts (a measure of stream flashiness), and produced recommendations for further development. Additionally, …

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Upholding Diverse Knowledge Systems To Identify Marine Areas Of High Ecological, Socio-Economic, And Cultural Value In Howe Sound/ÁTl'ka7tsem, British Columbia, Fiona Beaty, Myia Antone Apr 2022

Upholding Diverse Knowledge Systems To Identify Marine Areas Of High Ecological, Socio-Economic, And Cultural Value In Howe Sound/ÁTl'ka7tsem, British Columbia, Fiona Beaty, Myia Antone

Salish Sea Ecosystem Conference

Marine spatial planning (MSP) involves bringing together knowledge associated with marine spaces and identifying strategies that proactively address pressures while protecting ocean-based values for present and future generations. Unfortunately, MSP processes are often biased toward biophysical and western scientific knowledge, and can exclude diverse ways of knowing (e.g. Indigenous and local knowledge systems) and socio-economic and cultural data. This oversight can not only hamper the effectiveness of MSP, but also generate conflict with communities whose access and livelihoods are impacted by MSP outcomes. In response to this issue, our study led a community-based approach to identify areas of high socio-economic, …

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Urbanization Reduces Understory Kelp Abundance, Macroalgal Function, And Biogenic Complexity In The Salish Sea, Dr. Eliza Heery Apr 2022

Urbanization Reduces Understory Kelp Abundance, Macroalgal Function, And Biogenic Complexity In The Salish Sea, Dr. Eliza Heery

Salish Sea Ecosystem Conference

The Salish Sea, like coastal zones globally, is undergoing rapid urbanization, causing substantial changes to marine habitats and ecosystems. Urban gradient analysis is a common approach in terrestrial and freshwater systems for discerning ecological patterns relative to urban land-use. This study employed a similar approach to assess urban gradients in benthic macroalgal assemblages in Puget Sound. Using benthic photoquadrat data from 38 sites in Central, South, and Whidbey Basin, we characterized the relative importance of urban- and natural-environmental predictors on: (1) the presence/absence of understory kelp, (2) the composition of macroalgal functional groups, and (3) the structural complexity of macroalgal-formed …

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Scaling Shoreline Restoration To Improve Nearshore Marine Habitat For Salmon And Forage Fishes, Emily Bishop Apr 2022

Scaling Shoreline Restoration To Improve Nearshore Marine Habitat For Salmon And Forage Fishes, Emily Bishop

Salish Sea Ecosystem Conference

Shoreline restoration is a widespread activity with a multitude of ambitions. Goals often include protection of people and property from storms and sea level rise, improvement of habitat for fisheries and protected species, and mitigation of the effects of climate change through investments in blue carbon. However, few studies have directly assessed the impacts of restoration actions on specific ecological or economic endpoints, nor characterized the significance of the surrounding landscape to restoration outcomes. We conducted monthly surveys from April through September in 2018-2021 at six restoration sites in Puget Sound to evaluate associations between shoreline restoration and offshore subtidal …

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Finding Common Ground: Communicating Across Borders To Restore The Salish Sea, Jessica Rose, Jade Dudoward, David Sway-La Duenas Apr 2022

Finding Common Ground: Communicating Across Borders To Restore The Salish Sea, Jessica Rose, Jade Dudoward, David Sway-La Duenas

Salish Sea Ecosystem Conference

Puyallup Tribe’s Chief Leschi Schools, Tulalip Tribes, and students and professors at the University of Washington are collaborating through participatory digital storytelling centered around Salish Sea restoration. The goals include intercultural education exchange across multiple disciplines leading to a balanced collaboration between communities that will inform long term policy. Students rarely learn Washington State treaty rights yet Tribes are at the forefront of Salish Sea protection. The results are the erasure of Indigenous knowledge, wisdom, and ways of knowing. Non-indigenous students are learning how to communicate with Tribes by establishing and maintaining trusting relationships in a respectful manner while also …

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Density-Dependent Habitat Limitations For Juvenile Chinook Salmon In Large River Deltas Of Puget Sound, Dr. Correigh Greene Apr 2022

Density-Dependent Habitat Limitations For Juvenile Chinook Salmon In Large River Deltas Of Puget Sound, Dr. Correigh Greene

Salish Sea Ecosystem Conference

Efforts by people to restrain tidal inundation to promote agriculture and development has led to large amounts of tidal wetland habitat loss in large river deltas across the Pacific coast. Concomitant declines in these populations have raised questions about the extent to which juvenile Chinook salmon compete for limited estuary habitat and how estuary restoration will help recover populations. To examine the potential for habitat limitation, we used a cross-system approach to combine outmigrant and population density data in four large river deltas of Puget Sound. By adjusting outmigration abundance to natural-origin outmigrants/ha of delta channel, we were able to …

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Climate Impacts To Groundwater Ponding And Salinity – Stillaguamish And Snohomish, Daniel Elefant, Pe Apr 2022

Climate Impacts To Groundwater Ponding And Salinity – Stillaguamish And Snohomish, Daniel Elefant, Pe

Salish Sea Ecosystem Conference

Climate Impacts to Groundwater Ponding and Salinity – This engineering and geomorphology team collaborated with the Snohomish Conservation District (SCD) to assess localized and regional climate impacts to groundwater in the lower Stillaguamish and Snohomish River basins. The work contributed to a larger land use and community planning framework seeking solutions that promote both salmon and agricultural resiliency. Results of the assessment were presented to the local community via a series of sessions intentionally designed to facilitate climate change communication and education between the conservation district, flood control districts, Snohomish County, farmers, conservationists, scientists, and engineers. Each session began with …

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Improving The Use Of Science In Collaborative Ecosystem Restoration: Government And Non-Government Knowledge Brokers, Tom Koontz Apr 2022

Improving The Use Of Science In Collaborative Ecosystem Restoration: Government And Non-Government Knowledge Brokers, Tom Koontz

Salish Sea Ecosystem Conference

To address complex socio-ecological system challenges, policy makers and managers throughout the Salish Sea, and around the world, increasingly seek collaborative approaches. At the same time, the climate emergency and other environmental threats have drawn greater attention to science and its role in responding to these threats. Scientists are working to not only expand knowledge, but to put it into practice. What are the barriers and opportunities for bridging science and collaboration? In this comparative case study we examine how scientific research is valued, acquired, evaluated, and applied in collaborative ecosystem restoration. We gather data from three different types of …

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Developing The Ka:’Yu:’K’T’H’/Che:K’Tles7et’H’ First Nations Stewardship Program, Erica Olson Apr 2022

Developing The Ka:’Yu:’K’T’H’/Che:K’Tles7et’H’ First Nations Stewardship Program, Erica Olson

Salish Sea Ecosystem Conference

Over the past two centuries, the combined impacts of resource extraction, over-harvesting, and government policy has adversely impacted environmental health within Ka:’yu:’k’t’h’/Che:k’tles7et’h’ First Nations’ (KCFN) territory, and impaired KCFN members’ ability to utilize resources to harvest foods and medicines, and for cultural and other purposes. In response, KCFN has created a Stewardship Program to monitor and safeguard ecological and cultural resources, to document and/or deter human activities, and to establish a presence in the territory. In the first year of the program, Stewardship staff acquired equipment, conducted training, and carried out an initial set of activities, including boat-based patrols of …

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Salish Sea Marine Survival Project: Putting Findings Into Action For The Future Of Salmon, Jacques White Apr 2022

Salish Sea Marine Survival Project: Putting Findings Into Action For The Future Of Salmon, Jacques White

Salish Sea Ecosystem Conference

The Salish Sea Marine Survival Project (SSMSP, https://marinesurvivalproject.com) published its final Synthesis Report in 2021, summarizing key findings and recommendations from over 5 years of research into the causes of poor marine survival for Salish Sea Chinook, coho, and steelhead salmon. The project, led by Long Live the Kings in the U.S. and the Pacific Salmon Foundation in Canada, united more than sixty regional and international partners to enable one of the most comprehensive assessments of the Salish Sea ecosystem. It offers a critically important model for large-scale scientific collaborations addressing systemic, transboundary questions. This presentation summarizes the SSMSP’s approach …

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Neighbourhood Vs. Individual Property Scale Coastal Protection: A Case Study In Qualicum Beach, British Columbia, Jessica Wilson, Grant Lamont Apr 2022

Neighbourhood Vs. Individual Property Scale Coastal Protection: A Case Study In Qualicum Beach, British Columbia, Jessica Wilson, Grant Lamont

Salish Sea Ecosystem Conference

Individual property owners throughout the Salish Sea are faced with the need to adapt their shorelines to accommodate potentially degradative coastal processes, such as sea level rise and erosion. Simultaneously, there is a wide-spread push towards natural and nature-based approaches to coastal protection; however, these types of approaches (such as beach nourishments) are often ill-suited for implementation on individual properties, with frontages typically less than 100 m long. This challenge typically requires undesirable trade-offs during design to accommodate the physical constraints of an individual property. Alternatively, designs may be implemented on a neighbourhood-scale with fewer design trade-offs, and spreading both …

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One Island, One Earth: Exploring Island Ecological Footprints And Fingerprints, Michelle Thompson, Adam Huggins Apr 2022

One Island, One Earth: Exploring Island Ecological Footprints And Fingerprints, Michelle Thompson, Adam Huggins

Salish Sea Ecosystem Conference

Island communities have frequently been portrayed as passive victims of the climate crisis, but are also often considered to be models for the development of social capital and community resilience. As such, small island communities - like those in the Salish Sea - present unique challenges and opportunities in terms of evaluating community preparedness and adaptation to the climate crisis. The ecological footprint concept has long been employed in urban centers throughout our region as a powerful tool for understanding land and resource use in the context of climate change, but until recently has not been applied to small island …

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Downscaling Future Climate Models For Local Flood And Socioeconomic Exposure Across The Salish Sea With The Coastal Storm Modeling System (Cosmos), Dr. Patrick Barnard Apr 2022

Downscaling Future Climate Models For Local Flood And Socioeconomic Exposure Across The Salish Sea With The Coastal Storm Modeling System (Cosmos), Dr. Patrick Barnard

Salish Sea Ecosystem Conference

The U.S. Geological Survey Coastal Storm Modeling System (CoSMoS) is being developed for the Salish Sea to evaluate flood hazards at a scale of 1 m to support coastal planning into the next century. CoSMoS computes extreme water levels and flooding accounting for projected sea level rise and climate change effects on river floods and storms. Modeled tides and storm surge show a mean absolute error of 10 cm across NOAA and USGS tide gages over the hindcast period 2018-2019. Model forcings deconstructed over a 1985-2015 hindcast indicate that storm surge inside Puget Sound is driven primarily by atmospheric pressure …

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Tracking Salish Sea Environmental Changes In Real-Time, Dr. John Mickett Apr 2022

Tracking Salish Sea Environmental Changes In Real-Time, Dr. John Mickett

Salish Sea Ecosystem Conference

Using existing and freely available real-time environmental measurements in the Salish Sea and on the Washington shelf including mooring observations, atmospheric measurements, and river flow measurements, we developed five metrics to help understand and track primary factors contributing to changes in Salish Sea water properties, and, thus, potential ecological changes. These metrics, which include estuarine flow speed, river and rain effect on salinity, water-column oxygen availability, ocean boundary conditions, and heating or cooling of the water by the atmosphere, are intended to inform resource managers, scientists, health officials, and others on how key climate and ocean factors are influencing the …

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Neighbourhood-Scale Coastal Adaptation With Green Shores: Challenges And Opportunities, Jessica Wilson, Grant Lamont, Dg Blair, Luke Sales, Robyn Holme, David Robinson, Mike Waters Apr 2022

Neighbourhood-Scale Coastal Adaptation With Green Shores: Challenges And Opportunities, Jessica Wilson, Grant Lamont, Dg Blair, Luke Sales, Robyn Holme, David Robinson, Mike Waters

Salish Sea Ecosystem Conference

Coastal processes function on a larger scale than most individual properties can appropriately accommodate. Property frontages typically range on the order of 10s of meters, whereas coastal processes (such as sediment transport) often span 100s of meters or more. These scales pose a challenge for implementing natural and nature-based approaches on many individual properties. Neighbourhood-scale designs have the potential to avoid the site limitations posed by individual properties as well as distribute costs and benefits across a broader community. However, there are few examples of neighbourhood-scale projects being implemented within the Salish Sea to date. Northwest Hydraulic Consultants (NHC) – …

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Boundary Spanning In Support Of Ecosystem-Based Management, Dr. Tessa Francis Apr 2022

Boundary Spanning In Support Of Ecosystem-Based Management, Dr. Tessa Francis

Salish Sea Ecosystem Conference

Boundary spanning is a focused effort to facilitate the exchange of knowledge and information between disparate communities, such as knowledge producers (i.e., analysts, scientists, researchers, etc.) and knowledge users (i.e., decision-makers, policy makers, managers, etc.). Many boundary-spanning efforts are limited to single interfaces, or focused on producing single boundary objects. Here we describe the ongoing work of a boundary spanning organization that amounts to a system of activities conducted at interfaces between multiple communities engaged in ecosystem-based management of the Puget Sound, resulting in a suite of boundary objects. These examples illustrate a range of potential boundary spanning activities while …

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Incorporating Indigenous Methodologies For Assessing Conservation Risk, Reiley Terbasket, Jason Straka Apr 2022

Incorporating Indigenous Methodologies For Assessing Conservation Risk, Reiley Terbasket, Jason Straka

Salish Sea Ecosystem Conference

Formally designating an area as an “ecosystem at risk” can have intentional and unintentional consequences for how that area is treated, including: • The area being formally listed under pieces of legislation • Affecting the ways in which Indigenous nations interact with species or ecosystems in an area • Feeding into decision-making processes like land use planning, environmental assessments, and mitigation • Informing conservation targets, funding, or opportunities for establishing various types of protected areas But what goes into considering an ecosystem at risk? NatureServe and the International Union for Conservation of Nature (IUCN) have developed standard and respected methods …

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Profiling Marine Biotoxins In The Salish Sea, Dr. Andrew R.S. Ross, Blair Surridge, Harry Hartmann, Mackenzie Mueller, Nicole Frederickson, Svetlana Esenkulova, Isobel Isobel Apr 2022

Profiling Marine Biotoxins In The Salish Sea, Dr. Andrew R.S. Ross, Blair Surridge, Harry Hartmann, Mackenzie Mueller, Nicole Frederickson, Svetlana Esenkulova, Isobel Isobel

Salish Sea Ecosystem Conference

The frequency and magnitude of marine harmful algal blooms (HABs) appear to be increasing worldwide, influenced by factors such as eutrophication and climate change. Biotoxins produced by harmful algae can have a negative impact on marine life including fish, mammals and seabirds. Variations in the timing, extent, duration, and impact of toxic HABs have been linked to changing environmental conditions, including extreme events such as the 2014-2016 North Pacific marine heatwave. Scientists at Fisheries and Ocean Canada (DFO) have been partnering with the Pacific Salmon Foundation (PSF) Citizen Science program to collect and analyze biotoxin samples, taxonomic and environmental data …

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Collaborative Restoration Of Boundary Bay For Traditional Shellfish Harvest: Shared Waters Alliance, Christy Juteau, Harley Chappell Apr 2022

Collaborative Restoration Of Boundary Bay For Traditional Shellfish Harvest: Shared Waters Alliance, Christy Juteau, Harley Chappell

Salish Sea Ecosystem Conference

Shared Waters Alliance is an international working group focused on the water quality of the Canadian-US shared waters of Boundary Bay. Boundary Bay is a critical section of BC’s rare coastline habitat and is recognized locally, nationally and internationally. Shared Waters was formed in 1999 and is made up of representatives from government, First Nations and community groups from both countries. A primary driver for the formation of this working group was the shellfish harvesting closure on the Canadian side of the border due to bacteriological contamination. Indigenous peoples (including Semiahmoo First Nation) traditionally harvested the abundant fish and shellfish …

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Bioretention For Lakes: Washington's Search To Replace Compost In Our Stormwater Filters, Dr. Dylan Ahearn Apr 2022

Bioretention For Lakes: Washington's Search To Replace Compost In Our Stormwater Filters, Dr. Dylan Ahearn

Salish Sea Ecosystem Conference

Bioretention is the most widely applicable and flexible stormwater treatment practice we have available today. The Washington State Department of Ecology (Ecology) specification for bioretention soil media (BSM) is a mixture of 60 percent sand and 40 percent compost (60/40). Washington is not alone by including compost in BSM; Massachusetts, Nebraska, Maryland, Colorado, the list goes on. While the 60/40 BSM can provide reliable water quality treatment for some contaminants, it has been shown to export high levels of nitrogen and phosphorus. We will present the journey that the state of Washington has taken over the last 6 years to …

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Initial Sensitivity Analysis Of Nutrient Loading To Understand Hypoxia In The Salish Sea Sub-Basins, Su Kyong Yun Apr 2022

Initial Sensitivity Analysis Of Nutrient Loading To Understand Hypoxia In The Salish Sea Sub-Basins, Su Kyong Yun

Salish Sea Ecosystem Conference

The Salih Sea is a complex estuarine system crossing over the U.S and Canadian waters. It has high cultural, environmental, and economic importance, but the increasing levels of nutrient pollution have threatened its values and caused hypoxia, algal blooms, and fish kills. To understand the impact of nutrient loading on the Salish Sea, we used a diagnostic hydrodynamic and biogeochemical model of the Salish Sea (Salish Sea Model) which has been developed to simulate circulation and biogeochemical cycling. For a deeper understanding of the interaction between land-based nutrient loading and circulation characteristic of the Salish Sea, we conducted initial components …

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Impacts Of Predation On Pacific Herring Egg Survival In The Southern Salish Sea, Heidi Stewart Apr 2022

Impacts Of Predation On Pacific Herring Egg Survival In The Southern Salish Sea, Heidi Stewart

Salish Sea Ecosystem Conference

Pacific herring play a critical role in the food web of the Salish Sea. Because they are not charismatic megafauna there has been a lack of attention on the species, resulting in a limited understanding of their population dynamics and downward trends in their populations. The Cherry Point stock, centered 30 miles north of Bellingham Bay, has declined roughly 97% since the 1970s. This massive decline is a point of concern for environmental and fishery managers and has led to research into both the initial decline and its lack of recovery. One key hypothesis in need of research is whether …

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Planning, Engagement And Construction Of Blue-Green Systems: Creating Connected And Multi-Beneficial Solutions For The Road Right-Of-Way In Vancouver, Dr. Tugce Conger, Connor Redman Apr 2022

Planning, Engagement And Construction Of Blue-Green Systems: Creating Connected And Multi-Beneficial Solutions For The Road Right-Of-Way In Vancouver, Dr. Tugce Conger, Connor Redman

Salish Sea Ecosystem Conference

In 2019, Vancouver City Council adopted the Rain City Strategy, committing to capture and clean 90% of rainfall that falls within the City, and in doing so, transforming urban watersheds for present and future generations. At the same time, Vancouver is continuing to densify. With increasing density, there is a growing demand for space in the road right-of-way –rainwater management, more and larger servicing utilities, vehicles, transit, bikeways, and wider sidewalks are all competing for spaces. Blue-Green Systems (BGS) are an emerging green infrastructure typology that help the City to meet multiple objectives in the same space. The City and …

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The Living Dike – Pilot Project Phasetechnical Development From Multiple Multi-Discipline Walkabouts., John Readshaw, Gary Williams Apr 2022

The Living Dike – Pilot Project Phasetechnical Development From Multiple Multi-Discipline Walkabouts., John Readshaw, Gary Williams

Salish Sea Ecosystem Conference

The Living Dike – Pilot Project Phase Technical Development from multiple Multi-Discipline Walkabouts. Abstract Salish Sea Conference The Living Dike – Pilot Project Phase Technical Development from multiple Multi-Discipline Walkabouts. John Readshaw, P. Eng. SNC – Lavalin Inc. Gary Williams, RP Bio. G.L. Williams and Associates The Living Dike project, described in an earlier Salish Sea Conference presentation, has now moved into a seven year funded pilot project phase. As part of this phase, a series of walkabouts was undertaken at two of the intended pilot project sites to better understand the ecological services being provided by the existing saltmarsh …

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An Investigation Of Water Obstructions And Related Weather Conditions For Nebraska Roadways, Logan Bundy Apr 2022

An Investigation Of Water Obstructions And Related Weather Conditions For Nebraska Roadways, Logan Bundy

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

Roadway resilience across the 10,000 miles of road and 3,500 bridges in Nebraska is critical to the economic success of production and logistics. In a state where historical flooding scenarios, such as the one in March 2019 that caused $150 million in damage, could potentially be increasing, it has become essential to understand the spatial and temporal distribution of high-frequency water obstruction areas on roadways. Using Nebraska Department of Transportation (NDOT) historical water obstruction data from June 2016 through August 2021, statistical and spatial analyses were conducted to quantify the relationship between water obstructions and their associated meteorological conditions, and …

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