Submerged karst landforms observed by multibeam bathymetric survey in Nagura Bay, Ishigaki Island, southwestern Japan

Kan, Haidong; Urata, Kensaku; Nagao, Masayuki; Hori, Nobuyuki; Fujita, Kazuhiko; Yokoyama, Yūsuke; Nakashima, Yasuhiro; Ohashi, Tomoya; Goto, Kazuhisa; Suzuki, Atsushi

doi:10.1016/j.geomorph.2014.07.032

Cited by 30 publications

(25 citation statements)

References 42 publications

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“…A multibeam echosounder (MBES) survey was conducted using a broadband multibeam echosounder, Sonic 2022 (R2Sonic, LLC), and an accessory system from H. Kan's laboratory (Kan et al ., ; Ono et al ., ). The Sonic 2022 had a variable ultrasonic frequency of 200–400kHz, 256 ultrasonic beams, and a selectable swath of sectors from 10–160°.…”

Section: Methodsmentioning

confidence: 98%

Assessment and Significance of a World War II battle site: recording the USS Emmons using a High-Resolution DEM combining Multibeam Bathymetry and SfM Photogrammetry

Kan

Katagiri²,

Nakanishi

et al. 2018

International Journal of Nautical Archaeology

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The USS Emmons, a 106m US Navy Gleaves-class destroyer minesweeper that sank in 40m of water off Okinawa Island, Japan after kamikaze attack in 1945, is used as a case study for examining the history, multivocal significance, and heritage management of a World War II naval battle site. A baseline record of the site was made using an innovative method incorporating precise control points obtained from high-resolution multibeam echosounding bathymetry to generate 3D models using structure-from-motion photogrammetry. The 3D models produced can be used for sharing information about this underwater cultural heritage and for future in situ monitoring of the archaeological remains.

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Section: Methodsmentioning

confidence: 98%

Assessment and Significance of a World War II battle site: recording the USS Emmons using a High-Resolution DEM combining Multibeam Bathymetry and SfM Photogrammetry

Kan

Katagiri²,

Nakanishi

et al. 2018

International Journal of Nautical Archaeology

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“…Geographically, the site is located in the west coast of Ishigaki Island, where a westerly wind is rare at all times of the year (see Kan et al, 2015) (Fig. 2).…”

Section: Maritime Transport In the Ryukyu Kingdommentioning

confidence: 99%

“…We used a VS111 GPS compass system with A20 and A30 antennas (Hemisphere Inc.) combined with a dynamic motion sensor (DMS-10, Teledyne TSS Ltd), a sea surface sound velocity sensor (miniSVS, Valeport Ltd), and a sound velocity profiler (MicroSVP, AML Oceanographic Ltd). The sounding method is similar to that used in the Nagura Bay survey (Kan et al, 2015) but the ultrasonic frequency of 400 kHz was selected for the entire area of the Yarabuoki underwater site. The depth of the surveyed area ( Fig.…”

Section: Mapping Yarabuoki Underwater Sitementioning

confidence: 99%

Discovery of Iron Grapnel Anchors in Early Modern Ryukyu and Management of Underwater Cultural Heritage in Okinawa, Japan

Ono

Katagiri

Kan

et al. 2016

International Journal of Nautical Archaeology

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The Yarabuoki underwater site contains seven iron grapnel anchors and Early Modern Okinawan ceramic jars and is dated to the 16th-19th centuries. The site lies at a depth of 12-32 m off the western coast of Ishigaki Island in Okinawa, Japan. Based on underwater archaeological and broadband multibeam surveys, as well as historical research of the artefacts and Early Modern Ryukyuan shipping, we discuss the possible anchor and vessel types in Ryukyu and Eastern Asia in Early Modern times. We also discuss the efficacy of low-cost ROV for assisting surveys in shallow-water environments and the value of educational programmes for promoting the management and conservation of underwater cultural heritage.

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“…Cave studies in coastal areas are a key tool to characterize long-term landscape evolution and past sea-level oscillations (Paskoff, 2005;Kan et al, 2014;White and Webb, 2015;Jones, 2016). Furthermore, the presence of authigenic deposits such as speleothems allow the use of uranium/thorium dating ( 234 U/ 230 Th) up to 600 ka (Li et al, 1989;Edwards et al, 1987) to constrain the age of sea-level oscillations (Burnett et al, 2013;D'Angeli et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

New evidence of sea‐level lowstands and paleoenvironment during MIS 6 and 4 in the Cantabrian coastal karst: the Cobiheru cave (North Iberia)

Ballesteros

Rodríguez‐Rodríguez

González-Lemos

et al. 2017

Earth Surf Processes Landf

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The geomorphological evolution of the Cobiheru Cave shows the influence of the non‐carbonate coastal mountain ranges on coastal karst evolution, as well as the temporal distribution of the cold‐adapted fauna sites in the Cantabrian Coast. Geomorphological observation and uranium/thorium (U/Th) dating lead to the construction of an evolution model. The model comprises two episodes of cave deposition occurring at c. 60–70 and 130–150 ka, linked to cold climate conditions, global sea‐level lowstands and the erosion of alluvial fans that covered the karst. Moreover, the comparison between the Cobiheru record and some raised beaches identified in previous studies sets the beginning of the sea‐level lowering in the Cantabrian Sea during the marine isotope stages (MIS) 5–4 transition. Two palaeoenvironments are inferred based on finding Equus ferus and Elona quimperiana. A wet deciduous forest would have developed on the emerged marine terrace of the Cobiheru Cave since at least the Middle Pleistocene, and an open landscape with scarce vegetation would have been present at c. 65 ka. The erosional event identified in the Cobiheru Cave helps to understand the temporal distribution of cold‐adapted mammals located in the Asturias region. The probable sites of cold‐adapted fauna developed in caves and alluvial fans would have disappeared after 65 ka. Therefore, palaeontological and palaeoclimate research based on cold‐adapted mammals suggests the occurrence of an hiatus in the palaeontological record prior to 50 ka. Copyright © 2017 John Wiley & Sons, Ltd.

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Submerged karst landforms observed by multibeam bathymetric survey in Nagura Bay, Ishigaki Island, southwestern Japan

Cited by 30 publications

References 42 publications

Assessment and Significance of a World War II battle site: recording the USS Emmons using a High-Resolution DEM combining Multibeam Bathymetry and SfM Photogrammetry

Assessment and Significance of a World War II battle site: recording the USS Emmons using a High-Resolution DEM combining Multibeam Bathymetry and SfM Photogrammetry

Discovery of Iron Grapnel Anchors in Early Modern Ryukyu and Management of Underwater Cultural Heritage in Okinawa, Japan

New evidence of sea‐level lowstands and paleoenvironment during MIS 6 and 4 in the Cantabrian coastal karst: the Cobiheru cave (North Iberia)

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