Coastal and Marine Hazards and Resources Program

Publications

The Coastal and Marine Hazards and Resources Program publications are listed here. Search by topics and by year.

Filter Total Items: 1,149
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Year Published: 2020

Sea‐level rise will drive divergent sediment transport patterns on fore reefs and reef flats, potentially causing erosion on atoll islands

Atoll reef islands primarily consist of unconsolidated sediment, and their ocean‐facing shorelines are maintained by sediment produced and transported across their reefs. Changes in incident waves can alter cross‐shore sediment exchange and, thus, affect the sediment budget and morphology of atoll reef islands. Here we investigate the influence of...

Bramante, James F; Ashton, Andrew D; Storlazzi, Curt D.; Cheriton, Olivia; Donnelly, Jeffrey P.

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Year Published: 2020

Littoral sediment from rivers: Patterns, rates and processes of river mouth morphodynamics

Rivers provide important sediment inputs to many littoral cells, thereby replenishing sand and gravel of beaches around the world. However, there is limited information about the patterns and processes of littoral-grade sediment transfer from rivers into coastal systems. Here I address these information gaps by examining topographic and...

Warrick, Jonathan

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Year Published: 2020

Sediment export and impacts associated with river delta channelization compound estuary vulnerability to sea-level rise, Skagit River Delta, Washington, USA

Improved understanding of the budget and retention of sediment in river deltas is becoming increasingly important to mitigate and plan for impacts expected with sea level rise. In this study, analyses of historical bathymetric change, sediment core stratigraphy, and modeling are used to evaluate the sediment budget and environmental response of...

Grossman, Eric E.; Stevens, Andrew W.; Dartnell, Peter; George, Doug A; Finlayson, David

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Year Published: 2020

The effects of phosphatization on the mineral associations and speciation of Pb in ferromanganese crusts

The older layers of thick ferromanganese (FeMn) crusts from the central Pacific Ocean have undergone diagenetic phosphatization, during which carbonate fluorapatite (CFA) filled fractures and pore space and replaced carbonates. The effects of phosphatization on individual trace metal concentrations, speciation, and phase associations in FeMn...

Mizell, Kira; Hein, James R.; Koschinsky, Andrea; Hayes, Sarah M.

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Year Published: 2020

Distribution and transport of Olympia oyster, Ostrea lurida, larvae in northern Puget Sound, Washington, USA

As efforts for restoring Olympia oyster (Ostrea lurida) populations have expanded, there is an increased need to understand local factors that could influence the long-term success of these projects. To address concerns over potential limitations to recruitment at a restoration site in northern Puget Sound, Washington, USA, a study was developed...

Grossman, S.K.; Grossman, Eric E.; Barber, Julie S.; Gamblewood, S.K.; Crosby, Sean C

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Year Published: 2020

Research is needed to inform environmental management of hydrothermally inactive and extinct polymetallic sulfide (PMS) deposits

Polymetallic sulfide (PMS) deposits produced at hydrothermal vents in the deep sea are of potential interest to miners. Hydrothermally active sulfide ecosystems are valued for the extraordinary chemosynthetic communities that they support. Many countries, including Canada, Portugal, and the United States, protect vent ecosystems in their Exclusive...

Van Dover, CL; Colaco, Ana; Collins, PC; Croot, P; Metaxas, Anna; Murton, BJ; Swaddling, A; Boschen-Rose, R; Carlsson, J; Cuyvers, L; Fukushima, Toshio; Gartman, Amy; Kennedy, R.; Kriete, C; Mestre, NC; Molodtsova, T; Myhrvold, A; Pelleter, E; Popoola, SO; Qian, P-Y; Sarrazin, J; Sharma, R; Suh, YJ; Sylvan, JB; Tao, Chunhui; Tomczak, Michal; Vermilye, J

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Year Published: 2020

Increasing threat of coastal groundwater hazards from sea-level rise in California

Projected sea-level rise will raise coastal water tables, resulting in groundwater hazards that threaten shallow infrastructure and coastal ecosystem resilience. Here we model a range of sea-level rise scenarios to assess the responses of water tables across the diverse topography and climates of the California coast. With 1 m of sea-level rise,...

Befus, K.M.; Barnard, Patrick L.; Hoover, Daniel J.; Finzi Hart, Juliette; Voss, Clifford I.

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Year Published: 2020

Internal tides can provide thermal refugia that will buffer some coral reefs from future global warming

Observations show ocean temperatures are rising due to climate change, resulting in a fivefold increase in the incidence of regional-scale coral bleaching events since the 1980s; analyses based on global climate models forecast bleaching will become an annual event for most of the world’s coral reefs within 30–50 yr. Internal waves at tidal...

Storlazzi, Curt D.; Cheriton, Olivia; Van Hooidonk, Ruben; Zhao, Zhongxiang; Brainard, Russell E.

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Year Published: 2020

Large-scale erosion driven by intertidal eelgrass loss in an estuarine environment

Seagrasses influence local hydrodynamics by inducing drag on the flow and dampening near-bed velocities and wave energy. When seagrasses are lost, near-bed currents and wave energy can increase, which enhances bottom shear stresses, destabilizes sediment, and promotes suspension and erosion. Though seagrasses are being lost rapidly globally, the...

Walter, Ryan K.; O’Leary, Jenifer K.; Vitousek, Sean; Taherkhani, Mohsen; Geraghty, Carolyn; Kitajima, Ann

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Year Published: 2020

The importance of explicitly modelling sea-swell waves for runup on reef-lined coasts

The importance of explicitly modelling sea-swell waves for runup was examined using a 2D XBeach short wave-averaged (surfbeat, “XB-SB”) and a wave-resolving (non-hydrostatic, “XB-NH”) model of Roi-Namur Island on Kwajalein Atoll in the Republic of Marshall Islands. Field observations on water levels, wave heights, and wave runup were used to drive...

Quataert, Ellen; Storlazzi, Curt D.; van Dongeren, Ap; McCall, Robert T.

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Year Published: 2020

On the use of receiver operating character tests for evaluating spatial earthquake forecasts

Spatial forecasts of triggered earthquake distributions have been ranked using receiver operating characteristic (ROC) tests. The test is a binary comparison between regions of positive and negative forecast against positive and negative presence of earthquakes. Forecasts predicting only positive changes score higher than Coulomb methods, which...

Parsons, Thomas E.

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Year Published: 2020

Distribution of earthquakes on a branching fault system using integer programming and greedy sequential methods

A new global optimization method is used to determine the distribution of earthquakes on a complex, connected fault system. The method, integer programming, has been advanced in the field of operations research, but has not been widely applied to geophysical problems until recently. In this application, we determine the optimal distribution of...

Geist, Eric L.; Parsons, Thomas E.