Field Investigation on Coastal Morphological Processes of the South Kashimanada Coast

Sato, Shinji; Maeda, Ryo; Isobe, Masahiko; Sekimoto, Tsunehiro; Kasai, Masahiro; Torii, K.; Yamamoto, Koji

doi:10.2208/jscej.2000.663_89

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…Waves and winds are relatively weak in summer, except during typhoons; however, they are strong in winter, due to low-pressure systems. The mean tide level measured at 35°55′46″ N, 140°41′38″ E by the Kashima Port and Airport Construction Offi ce was z = 0·65 m; this showed an increase at a rate of 5·6 mm year On the coast, the predominant direction of longshore littoral drift is reported to be from the south-east to the north-west, because the wave energy fl ux toward the north-west is greater than that in the opposite direction (Uda et al, 1987;Saito et al, 1997;Sato et al, 2003). A total of 33 headlands had been installed in combination with nourishment along the coast since the 1980s as a countermeasure for coastal erosion after the construction of Kashima Port in the 1960s.…”

Section: Study Areamentioning

confidence: 99%

Backshore coarsening processes triggered by wave‐induced sand transport: the critical role of storm events

Udo

Mano

2010

Earth Surf Processes Landf

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Spatial backshore processes were investigated through fi eld observations of topography and median sand grain size at a sandy beach facing the Pacifi c Ocean in Japan. A comparison of the backshore profi le and cross-shore distribution of the median sand grain size in 1999 and 2004 revealed an unusual sedimentary process in which sand was coarsened in a depositional area in the 5-year period, although sediment is generally coarsened in erosional areas. In support of these observations, monthly spatial fi eld analyses carried out in 2004 demonstrated a remarkable backshore coarsening process triggered by sedimentation in the seaward part of the backshore during a storm event. In order to elucidate mechanisms involved in the backshore coarsening process, thresholds of movable sand grain size under wave and wind actions (a uniform parameter for both these cases) in the onshore and offshore directions were estimated using wave, tide, and wind data. The cross-shore distributions of the estimated thresholds provided reasonable values and demonstrated a coarsening mechanism involving the intermediate zone around the shoreline under alternating wave and wind actions as a result of which coarse sand was transported toward the seaward part of the backshore by large waves during storms and then toward the landward part by strong onshore winds. The 5-year backshore coarsening is most certainly explained by repetition of short-term coarsening mechanisms caused by wave-induced sand transport occurring from the nearshore to the intermediate zone.

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Section: Study Areamentioning

confidence: 99%

Backshore coarsening processes triggered by wave‐induced sand transport: the critical role of storm events

Udo

Mano

2010

Earth Surf Processes Landf

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“…The comparison of survey data and the dating by using fallout flux of radioactive Pb-210 [see, e.g. Sato et al 2002] demonstrated that the surface sediments on the downstream riverbed and the sand bar at the river mouth are considered to be fresh sediments deposited within these 30 years and the sediments at 10.3 m deep in the sand bar is considered to be older than at least several decades [Abe et al, 2003]. It is therefore considered that the transport of hornblende particles, enriched in the upstream of dams, has been blocked by the construction of dams.…”

Section: Nearshore Sediment Movement Inferred From Mineral Analysismentioning

confidence: 99%

“…The source and the track path of sediments in the watershed and the nearshore zone can be estimated from the distribution of sediment size [Sunamura, 1971;Liu et al, 2000] and minerals characterizing the locality [Lee et al, 2000]. The dating of the sediment layer can be achieved by the measurement of radioactivity [McManus et al, 1998;Dominey-Howes et al, 2000;Sato et al, 2002]. A comprehensive analysis on regional sediment management was performed by coupling field measurements with various numerical models [e.g.…”

Section: Introductionmentioning

confidence: 99%

Sand Movement and Long-Term Beach Evolution in a Fluvial System Composed of the Samegawa River and the Nakoso Coast

Sato

Kajimura

Abe

et al. 2004

Coastal Engineering Journal

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A field investigation on sediment movement and beach evolution was performed in a fluvial system composed of the Samegawa River and the Nakoso coast, which experienced significant beach erosion recently. Analyses of regional sand volume in the system revealed that the rate of decrease in nearshore sand on the beach is of the same order as the rate of accumulation of sand in dam reservoirs. Dredging of the riverbed near the river mouth also influenced nearby shoreline retreat. Long-term changes in sand movement processes were estimated from the distribution of mineral composition included in the sediment samples collected in a wide area. 219 Coast. Eng. J. 2004.46:219-241. Downloaded from www.worldscientific.com by PURDUE UNIVERSITY on 04/13/15. For personal use only. 220 S. Sato et al.

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Organometallic Polycondensation for Conjugated Polymers

Yamamoto

2010

Conjugated Polymer Synthesis

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Field Investigation on Coastal Morphological Processes of the South Kashimanada Coast

Cited by 6 publications

References 2 publications

Backshore coarsening processes triggered by wave‐induced sand transport: the critical role of storm events

Backshore coarsening processes triggered by wave‐induced sand transport: the critical role of storm events

Sand Movement and Long-Term Beach Evolution in a Fluvial System Composed of the Samegawa River and the Nakoso Coast

Organometallic Polycondensation for Conjugated Polymers

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