Analyzing Bedforms Mapped Using Multibeam Sonar to Determine Regional Bedload Sediment Transport Patterns in the San Francisco Bay Coastal System

Barnard, Patrick L.; Erikson, Li H.; Rubin, David M.; Dartnell, Peter; Kvitek, Rikk G.

doi:10.1002/9781118311172.ch13

Cited by 9 publications

(13 citation statements)

References 29 publications

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“…Nevertheless, the results do not match the global mean statistical regression that was compiled by Flemming (1988Flemming ( , 2000 Other parameters, such as bed conditions associated with the quantity, nature and mobility of sediments must also be taken into account (Barnard et al, 2012). At most sites in the Irish Sea, coarser grained sediments (median grain diameter d 50 about 1 mm) tend to form higher sediment waves in response to local hydrodynamics.…”

Section: Equilibrium Conditionsmentioning

confidence: 56%

Giant dune morphologies and dynamics in a deep continental shelf environment: Example of the banc du four (Western Brittany, France)

et al. 2013

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Section: Equilibrium Conditionsmentioning

confidence: 56%

Giant dune morphologies and dynamics in a deep continental shelf environment: Example of the banc du four (Western Brittany, France)

et al. 2013

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“…The resultant map illustrates the main hydrodynamic processes which impact sediment distribution at the land-sea transition. Several studies have already used the methods presented in this paper to understand how the dynamic processes impact on the geomorphology and sedimentary partitioning in tide-dominated estuaries (Barnard, Erikson, Elias, et al, 2012;Barnard, Erikson, Rubin, Dartnell, & Kvitek, 2012;Garcia-Gíl, Durán, & Vilas, 2000;Shaw et al, 2014). This new study will allow detailed comparison of scale facies distribution with other confined estuaries.…”

Section: Resultsmentioning

confidence: 99%

Modern morpho-sedimentological patterns in a tide-dominated estuary system: the Bay of Brest (west Britanny, France)

et al. 2016

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Long-studied with respect to its sedimentological features (1897), the Bay of Brest (Western Britanny, France) is a textbook example of a tide-dominated estuary. Characterised by macrotidal conditions, this estuary system is sheltered from the open sea (Iroise Sea) by a narrow strait that partitions the wave tide influences and continental/marine inputs. Sediments are supplied to the bay both by rivers (the Aulne and Elorn rivers) and by marine tidal currents. This study presents new analyses of detailed facies and morphological patterns, based on the integration of multisource data compiling seabed sampling, swath and LIDAR bathymetry, and backscatter imagery. The Main Map, at a scale of 1:90,000, contains (1) a sedimentological distribution using the 'Code Manche' classification, (2) a morphological map, and (3) bathymetric mapping which presents the morphology of marine and terrestrial landforms. This work may lay the foundation for a future study on sedimentary transport in a unique and confined coastal environment. ARTICLE HISTORY

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“…The migration rate C of sand waves was found by Knaapen [23] to be related to bedform asymmetry A, wavelength L, and sand-wave height H. This empirical relationship was developed and validated using 12 different sites in the North Sea where repeated MBES surveys were completed [23]. The technique has been applied in other geographic areas with tidal sand waves [22,23].…”

Section: Resultsmentioning

confidence: 99%

“…Barnard and others [22] mapped bedforms in San Francisco Bay, California using repeated MBES surveys, and estimated sand wave migration rates and bed-load transport patterns. Barnard and others [22] summarized previous mapping and analytical studies of sand wave dynamics in other coastal regions, and provided a comprehensive analysis of sand wave patterns and movement in San Francisco Bay based on over 3000 sand waves. They applied a technique to estimate sand wave migration rates using bedform asymmetry that was formulated for sand waves off the Dutch coast by Knappen [23].…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Dynamics of a Large Sub-Tidal Sand Wave Field—Habitat for Pacific Sand Lance (Ammodytes personatus), Salish Sea, Washington, USA

2017

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Deep-water sand wave fields in the San Juan Archipelago of the Salish Sea and Pacific Northwest Washington, USA, have been found to harbor Pacific sand lance (PSL, Ammodytes personatus), a critical forage fish of the region. Little is known of the dynamics of these sand waves and the stability of the PSL sub-tidal habitats. Therefore, we have undertaken an initial investigation to determine the dynamic conditions of a well-known PSL habitat in the San Juan Channel within the Archipelago using bottom sediment sampling, an acoustical doppler current profiling (ADCP) system, and multi-beam echo sounder (MBES) bathymetry. Our study indicates that the San Juan Channel sand wave field maintained its shape and bedforms geometry throughout the years it has been studied. Based on bed phase diagrams for channelized bedforms, the sand waves appear to be in a dynamic equilibrium condition. Sea level rise may change the current regime within the Archipelago and may alter some of the deep-water or sub-tidal PSL habitats mapped there. Our findings have global significance in that these dynamic bedforms that harbor PSL and sand-eels elsewhere along the west coast of North America and in the North Sea may also be in a marginally dynamic equilibrium condition and may be prone to alteration by sea level rise, indicating an urgency in locating and investigating these habitats in order to sustain the forage fish.

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Analyzing Bedforms Mapped Using Multibeam Sonar to Determine Regional Bedload Sediment Transport Patterns in the San Francisco Bay Coastal System

Cited by 9 publications

References 29 publications

Giant dune morphologies and dynamics in a deep continental shelf environment: Example of the banc du four (Western Brittany, France)

Giant dune morphologies and dynamics in a deep continental shelf environment: Example of the banc du four (Western Brittany, France)

Modern morpho-sedimentological patterns in a tide-dominated estuary system: the Bay of Brest (west Britanny, France)

Characteristics and Dynamics of a Large Sub-Tidal Sand Wave Field—Habitat for Pacific Sand Lance (Ammodytes personatus), Salish Sea, Washington, USA

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