Three-dimensional structure of coral reef boulders transported by stormy waves using the very high resolution WorldView-2 satellite

被引:4
作者
Collin, Antoine [1 ,2 ]
Etienne, Samuel [1 ,2 ]
Jeanson, Matthieu [1 ]
机构
[1] Ecole Prat Hautes Etud, CNRS UMR 8586, Coastal Geomorphol & Environm Lab, Prodig Dinard, France
[2] CORAIL LAB EXcellence, Perpignan, France
关键词
Boulder geomorphology; VHR remote sensing; high-energy event; Tetiaroa atoll; DEPOSITS;
D O I
10.2112/SI75-115.1
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Coral reef boulders have been showed to reliably characterize the amount of wave energy related to cyclone, storm or tsunami events. The wave height and current velocity have been successfully explained by the variability in the boulder individual (morphology) and population (distribution) spatial patterns. Even if a single boulder may include a substantial amount of information, it may be highly challenging to characterize it given the access difficulty at the local and regional scales. Moreover, a boulder population is meaningful to robustly and continuously depict the energetic event that drove the sediment transportation. Recently the very high resolution satellite remote sensing has been demonstrated to help classify and measure the horizontal patterns (A- and B-axes) of the boulders at the submeter scale. Here we focus on the vertical dimension (C-axis) of the boulders. Based on boulder fieldwork measurements of the three axes and geographic locations, we constrain various spectral parameters of the remotely sensed datasets (WorldView-2) to retrieve the three axes of the boulders, reaching a very satisfactory agreements (R-2) of 0.95, 0.88 and 0.75, respectively. The innovative C extraction combined with the A and B information will allow geomorphologists to rapidly and extensively collect boulder data so that the underlying energy can be computed in a more expanded and accurate way, at the population scale.
引用
收藏
页码:572 / 576
页数:5
相关论文
共 9 条
[1]  
Collin A., 2012, P 12 INT COR REEF S, P9
[2]   High-energy events, boulder deposits and the use of very high resolution remote sensing in coral reef environments [J].
Collin, Antoine ;
Etienne, Samuel ;
Planes, Serge .
JOURNAL OF COASTAL RESEARCH, 2013, :690-695
[3]   Bridging Ridge-to-Reef Patches: Seamless Classification of the Coast Using Very High Resolution Satellite [J].
Collin, Antoine ;
Archambault, Philippe ;
Planes, Serge .
REMOTE SENSING, 2013, 5 (07) :3583-3610
[4]  
Etienne S, 2012, GEOL SOC SPEC PUBL, V361, P21, DOI 10.1144/SP361.4
[5]   The use of boulders for characterising past tsunamis: Lessons from the 2004 Indian Ocean and 2009 South Pacific tsunamis [J].
Etienne, Samuel ;
Buckley, Mark ;
Paris, Raphael ;
Nandasena, Aruna K. ;
Clark, Kate ;
Strotz, Luke ;
Chague-Goff, Catherine ;
Goff, James ;
Richmond, Bruce .
EARTH-SCIENCE REVIEWS, 2011, 107 (1-2) :76-90
[6]   Sedimentary processes associated with sand and boulder deposits formed by the 2011 Tohoku-oki tsunami at Sabusawa Island, Japan [J].
Goto, Kazuhisa ;
Sugawara, Daisuke ;
Ikema, Satoko ;
Miyagi, Toyohiko .
SEDIMENTARY GEOLOGY, 2012, 282 :188-198
[7]   Waves, coastal boulder deposits and the importance of the pre-transport setting [J].
Nott, J .
EARTH AND PLANETARY SCIENCE LETTERS, 2003, 210 (1-2) :269-276
[8]  
Terry J., 2013, SPRINGERBRIEFS EARTH
[9]   Potential for timing high-energy marine inundation events in the recent geological past through age-dating of reef boulders in Fiji [J].
Terry J.P. ;
Etienne S. .
Geoscience Letters, 1 (1)