The influence of coarse woody debris on gravel beach geomorphology

Kennedy, David M.; Woods, Josephine L.D.

doi:10.1016/j.geomorph.2012.03.009

Cited by 35 publications

(29 citation statements)

References 46 publications

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“…The widest profiles occur on the open coast in front of Lake Kohangapiripiri where the beach is 340 m wide where it forms part of a small barrier at the front of the valley. The beachface morphology along this section of the coast, as well as between the Orongorongo and Wainuiomata Rivers (Kennedy and Woods, in press), are morphologically similar to the prograding sections in Rona and Robinson Bay.…”

Section: Resultsmentioning

confidence: 72%

“…The beaches lie within a 20 km unidirectional littoral drift system that flows in a westerly direction along the open coast before turning northwards when it enters the harbour. Topographic surveying as part of this study was conducted on the downstream 12 km of the system, with Kennedy and Woods (in press) surveying the uppermost c . 2 km of the system between the Orongorongo and Wainuiomata Rivers.…”

Section: Resultsmentioning

confidence: 99%

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Decadal‐scale gravel beach evolution on a tectonically‐uplifting coast: Wellington, New Zealand

Olson

Kennedy

Dawe

et al. 2012

Earth Surf Processes Landf

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Uplift of the shoreline in tectonically‐active areas can have a profound influence on geomorphology changing the entire process dynamics of the coast as the landforms are removed from the influence of the sea. Over decadal timescales it is possible for the landforms to return to their pre‐earthquake condition and this paper examines the re‐establishment of mixed sand and gravel beaches on the coast of Wellington, New Zealand, subsequent to an uplift event in 1855. Over 60 topographic profiles were surveyed, seven sets of aerial photographs from a 67 year period were mapped and sediment size analyses conducted in order to quantify the nature of beach change following uplift, and associated relative sea level fall. These data were supported by surveys using ground penetrating radar. It is found that uplift raised the gravel beaches out of the swash zone thereby removing them from the littoral zone. Intertidal rocky reefs which occur between each embayment were also uplifted during the same event and completely interrupted the longshore transport system. Continued input of gravel material to the littoral zone allowed beaches to re‐establish sequentially along the coast as each embayment was infilled with sediment. This reconnection of the embayments with the longshore drift system is associated with the beach planform being initially drift dominated during infill but then switching to swash alignment once the embayment becomes infilled. This has resulted in shoreline accretion of over 100 m in some places, at rates of up to 4 m/yr, covering shore protection works built in the past few decades. The ability of the shore to adjust back to its pre‐uplift condition appears to be a function of the accommodation space created during uplift and the rate of sediment supply. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Decadal‐scale gravel beach evolution on a tectonically‐uplifting coast: Wellington, New Zealand

Olson

Kennedy

Dawe

et al. 2012

Earth Surf Processes Landf

Self Cite

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“…Because the life/death cycle is constant, it would seem safe to assume that the amounts of deadfall in a search radius would be similar within common geographic ranges, though variability within the landscape would affect density of resource materials (Dufraisse, 2008;Out, 2010;Sutton and Anderson, 2010). Kennedy and Woods (2012) argue that "coarse woody debris" comprises accumulations of wood derived from direct tree fall into a river/stream channel, materials transported down river or from higher up within a catchment. Debris forms distinct jams within a river where smaller pieces of wood will accumulate around larger logs that have become stranded on the channel bed or the banks and be easily collected within eddy sections of a river (Kennedy and Woods, 2012).…”

Section: Indigenous Fuel Resourcesmentioning

confidence: 99%

“…Kennedy and Woods (2012) argue that "coarse woody debris" comprises accumulations of wood derived from direct tree fall into a river/stream channel, materials transported down river or from higher up within a catchment. Debris forms distinct jams within a river where smaller pieces of wood will accumulate around larger logs that have become stranded on the channel bed or the banks and be easily collected within eddy sections of a river (Kennedy and Woods, 2012).…”

Section: Indigenous Fuel Resourcesmentioning

confidence: 99%

Fuel exploitation as a factor in Shoshone winter mobility

Bishop

Plew

2015

North American Archaeologist

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This paper estimates fuel exploitation as a way of assessing the extent to which use of firewood in the Desert West should be considered an important factor in determining on the basis of seasonal use, how quickly available wood stores would be exploited. Recognizing that more mobile foragers during spring-fall may not be seriously impacted by fuel availability, we focus our discussion on the potential impact of fuel depletion during the winter period. We use Julian Steward and Murphy and Murphy's locational descriptions of winter villages on the Snake River Plain to calculate fuel return rates of driftwood/deadfall and sagebrush by foraging radii. We argue that fuel depletion is a primary cause of re-location of encampments during the winter period.

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“…Incipient dunes form closest to the swash, when pioneer vegetation (Hilton and Konlechner 2011), or obstructions such as wrack trap windblown sand (Kennedy and Woods 2012). Furthermore, the critical role of plants in the initiation and development of dunes has long been recognized (e.g.…”

Section: Introductionmentioning

confidence: 99%