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  • 1
    Online Resource
    Online Resource
    Joint isotopic mass balance: a novel approach to quantifying channel bed to channel margins sediment transfer during storm events
    Wiley ; 2015
    In:  Earth Surface Processes and Landforms Vol. 40, No. 12 ( 2015-09-30), p. 1563-1573
    Details
    In: Earth Surface Processes and Landforms, Wiley, Vol. 40, No. 12 ( 2015-09-30), p. 1563-1573
    Abstract: The important role of floodplains and the broader riparian zone in providing temporary storage for a large fraction of the annual sediment load of rivers is well established, but this understanding is largely based on observations of the long‐term average behavior of the catchment. Here we combine measurements of the fallout radionuclides 7 Be and 210 Pb and the stable isotopes of hydrogen in water to quantify fine sediment mobilization and storage in a stream and its channel margins during individual intermediate‐sized storm events with recurrence intervals of a few months or less. We demonstrate this method using five storm events in a small (~15 km 2 ), undeveloped, gravel‐bedded tributary of the Connecticut River (USA). We estimate that in each storm, the mass of sediment deposited onto the margins accounts for almost 90% of the sediment mobilized from the bed, with the remainder of the mobilized bed sediment transported downstream as suspended load. The result that the bed is a net source of sediment to the stream and the margins a net sink is robust, but estimates of the mass of material eroded from the bed and deposited on the margins are less certain. The source of sediment to the bed remains unclear as, consistent with earlier studies, we observe only limited deposition of sediment to the bed during the storm events. The suspended sediment is organic‐rich and thus its source may be associated with in‐channel organic decay between storm events. Understanding the coupled interactions between discharge magnitude and frequency and sediment resupply at the event time scale has important implications for stream restoration efforts seeking to connect the channel and the broader riparian zone, and for the development of accurate sediment budgets and predictions of sediment flux from a watershed. Copyright © 2015 John Wiley & Sons, Ltd.
    Type of Medium: Online Resource
    ISSN: 0197-9337 , 1096-9837
    URL: Issue
    URL: Article
    DOI: 10.1002/esp.v40.12
    DOI: 10.1002/esp.3734
    Language: English
    Publisher: Wiley
    Publication Date: 2015
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  • 2
    Online Resource
    Online Resource
    Fine-Sediment Deposition from Gravity Surges on Uniform Slopes
    Society for Sedimentary Geology ; 1994
    In:  SEPM Journal of Sedimentary Research Vol. Vol. 64A ( 1994)
    Details
    In: SEPM Journal of Sedimentary Research, Society for Sedimentary Geology, Vol. Vol. 64A ( 1994)
    Type of Medium: Online Resource
    ISSN: 1527-1404
    URL: Article
    DOI: 10.1306/D4267DD4-2B26-11D7-8648000102C1865D
    Language: English
    Publisher: Society for Sedimentary Geology
    Publication Date: 1994
    detail.hit.zdb_id: 1340028-9
    detail.hit.zdb_id: 2047570-6
    SSG: 13
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  • 3
    Online Resource
    Online Resource
    Links between erosion, runoff variability and seismicity in the Taiwan orogen
    Springer Science and Business Media LLC ; 2003
    In:  Nature Vol. 426, No. 6967 ( 2003-12), p. 648-651
    Details
    In: Nature, Springer Science and Business Media LLC, Vol. 426, No. 6967 ( 2003-12), p. 648-651
    Type of Medium: Online Resource
    ISSN: 0028-0836 , 1476-4687
    URL: Article
    DOI: 10.1038/nature02150
    RVK:
    TA 1000
    RVK:
    UA 1000
    RVK:
    WA 15000
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2003
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    detail.hit.zdb_id: 1413423-8
    SSG: 11
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  • 4
    Online Resource
    Online Resource
    Geomorphic Evolution of a Barrier Island Reflects the History of Natural Sediment Supply and Human Intervention in Taiwan
    Coastal Education and Research Foundation ; 2010
    In:  Journal of Coastal Research Vol. 261 ( 2010-01), p. 53-58
    Details
    In: Journal of Coastal Research, Coastal Education and Research Foundation, Vol. 261 ( 2010-01), p. 53-58
    Type of Medium: Online Resource
    ISSN: 0749-0208 , 1551-5036
    URL: Article
    DOI: 10.2112/08-1008.1
    Language: English
    Publisher: Coastal Education and Research Foundation
    Publication Date: 2010
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    detail.hit.zdb_id: 2156089-4
    SSG: 14
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  • 5
    Online Resource
    Online Resource
    Fine particle deposition to initially starved, stationary, planar beds
    Wiley ; 2009
    In:  Sedimentology Vol. 56, No. 7 ( 2009-12), p. 1976-1991
    Details
    In: Sedimentology, Wiley, Vol. 56, No. 7 ( 2009-12), p. 1976-1991
    Abstract: Reported here are results from new flume experiments examining deposition and entrainment of inert, silt‐sized particles (with spherical diameters in the range from 20 to 60 μm) to and from planar, impermeable and initially starved beds underlying channel flows. Bed surfaces comprised smooth or fixed sand‐size granular roughness and provided hydraulically smooth to transitionally rough boundaries. Results of these experiments were analysed with a simple model that describes the evolution of vertically averaged concentration of suspended sediment and accommodates the simultaneous delivery to and entrainment of grains from the bed. The rate of particle arrival to a bed diminishes linearly, and the rate of particle entrainment increases by the 5/2 power, as the value of the dimensionless Saffman parameter S = u * 3 / g’ν approaches a threshold value of order unity, where u is the conventional friction velocity of the turbulent channel flow, g’ is the acceleration due to gravity adjusted for the submerged buoyancy of individual particles and ν is the kinematic viscosity of the transporting fluid. This transport behaviour is consistent with the notion that non‐cohesive, silt‐sized particles can neither reach nor remain on an impermeable bed under flow conditions where mean lift imposed on stationary particles in the viscous sublayer equals or exceeds the submerged weight of individual particles. Within the size range of particles used in these experiments, particle size and the characteristic size of granular roughness, up to that of medium sand, did not affect rates of dimensionless arrival or entrainment to a significant degree. Instead, a new but consistent picture of fine‐particle transport is emerging. Silt‐sized material, at least, is subject to potentially significant interaction with the bed during intermittent suspension transport at intermediate flow speeds greater than the value required for initiation of transport ( ca  20 cm sec −1 ) but less than the value ( ca  50 cm sec −1 ) required by the Saffman criterion ensuring transport in fully passive suspension or, equivalently, ‘wash‐load’.
    Type of Medium: Online Resource
    ISSN: 0037-0746 , 1365-3091
    URL: Issue
    URL: Article
    DOI: 10.1111/sed.2009.56.issue-7
    DOI: 10.1111/j.1365-3091.2009.01065.x
    RVK:
    RB 10121
    Language: English
    Publisher: Wiley
    Publication Date: 2009
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  • 6
    Online Resource
    Online Resource
    Runout and fine‐sediment deposits of axisymmetric turbidity currents
    American Geophysical Union (AGU) ; 1995
    In:  Journal of Geophysical Research: Oceans Vol. 100, No. C9 ( 1995-09-15), p. 18597-18609
    Details
    In: Journal of Geophysical Research: Oceans, American Geophysical Union (AGU), Vol. 100, No. C9 ( 1995-09-15), p. 18597-18609
    Abstract: We develop a model that describes the runout behavior and resulting deposit of a radially spreading, suspension‐driven gravity current on a surface of negligible slope. Our analysis considers the separate cases of constant‐volume and constant‐flux sources. It incorporates expressions for the conservation of volume, a Froude number condition at the current front, and the evolution of the driving suspension due to settling of particles to the underlying bed. The model captures the key features of a range of experimental observations. The analysis also provides important scaling relationships between the geometry of a deposit and the source conditions for the deposit‐forming flow, as well as explicit expressions for flow speed and deposit thickness as functions of radial distance from the source. Among the results of our study we find that, in the absence of information regarding flow history, the geometries of relatively well‐sorted deposits generated by flows with source conditions of constant volume or constant flux are virtually indistinguishable. The results of our analysis can be used by geologists in the interpretation of some geologically important gravity‐surge deposits. Using our analytical results, we consider three previously studied, radially symmetric turbidites of the Hispaniola‐Caicos basin in the western Atlantic Ocean. From gross geometry and grain size of the turbidites alone we estimate for the respective deposit‐forming events that upon entry into the basin the initial sediment concentrations were approximately 3% by volume and the total volumes were roughly between 30 km 3 and 100 km 3 . Each of the suspension‐driven flows is inferred to have spread into the basin with a characteristic speed of 3–5 m s −1 , and reached its ultimate runout length of about 60–75 km while laying down a deposit over a period of about 10–12 hours.
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/95JC01917
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1995
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    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
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  • 7
    Online Resource
    Online Resource
    A statistical model for the timing of earthquakes and volcanic eruptions influenced by periodic processes : PERIODICITY OF VOLCANOES AND EARTHQUAKES
    American Geophysical Union (AGU) ; 2004
    In:  Journal of Geophysical Research: Solid Earth Vol. 109, No. B2 ( 2004-02)
    Details
    In: Journal of Geophysical Research: Solid Earth, American Geophysical Union (AGU), Vol. 109, No. B2 ( 2004-02)
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/2003JB002584
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2004
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    detail.hit.zdb_id: 3094104-0
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    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
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    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
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  • 8
    Online Resource
    Online Resource
    A laboratory study of dynamic sorting of fine, non-cohesive particles by steady, unidirectional currents
    Elsevier BV ; 2013
    In:  Marine Geology Vol. 336 ( 2013-2), p. 215-222
    Details
    In: Marine Geology, Elsevier BV, Vol. 336 ( 2013-2), p. 215-222
    Type of Medium: Online Resource
    ISSN: 0025-3227
    URL: Article
    DOI: 10.1016/j.margeo.2012.11.014
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2013
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    detail.hit.zdb_id: 2181-7
    SSG: 13
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  • 9
    Online Resource
    Online Resource
    Erosion of the submarine flanks of the Canary Islands : VOLCANIC ISLAND SUBMARINE EROSION
    American Geophysical Union (AGU) ; 2003
    In:  Journal of Geophysical Research: Earth Surface Vol. 108, No. F1 ( 2003-12), p. n/a-n/a
    Details
    In: Journal of Geophysical Research: Earth Surface, American Geophysical Union (AGU), Vol. 108, No. F1 ( 2003-12), p. n/a-n/a
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/2002JF000003
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2003
    detail.hit.zdb_id: 2033040-6
    detail.hit.zdb_id: 3094104-0
    detail.hit.zdb_id: 2130824-X
    detail.hit.zdb_id: 2016813-5
    detail.hit.zdb_id: 2016810-X
    detail.hit.zdb_id: 2403298-0
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 161666-3
    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
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  • 10
    Online Resource
    Online Resource
    Emplacement of Taupo ignimbrite
    Springer Science and Business Media LLC ; 1997
    In:  Nature Vol. 385, No. 6614 ( 1997-1), p. 307-308
    Details
    In: Nature, Springer Science and Business Media LLC, Vol. 385, No. 6614 ( 1997-1), p. 307-308
    Type of Medium: Online Resource
    ISSN: 0028-0836 , 1476-4687
    URL: Article
    DOI: 10.1038/385307a0
    RVK:
    TA 1000
    RVK:
    UA 1000
    RVK:
    WA 15000
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 1997
    detail.hit.zdb_id: 120714-3
    detail.hit.zdb_id: 1413423-8
    SSG: 11
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