Incipient Erosion of Biostabilized Sediments Examined Using Particle-Field Optical Holography

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• 作者：Kevin S. Black ; Hongyue Sun ; Gary Craig ; David M. Paterson ; John Watson ; and Trevor Tolhurst
• 刊名：Environmental Science & Technology
• 出版年：2001
• 出版时间：June 1, 2001
• 年：2001
• 卷：35
• 期：11
• 页码：2275 - 2281
• 全文大小：477K
• 年卷期：v.35,no.11(June 1, 2001)
• ISSN：1520-5851

文摘

Laser holography allows images of three-dimensionalspace at ultra-high resolution to be recorded ontophotographic plates. Recorded scenes can be "replayed"with a second laser beam into free space and optically"interrogated" using either a microscope or a camera bysequentially focusing on increasing distances from thehologram in the field of view (optical sectioning). From thesesections, information on the relative locations andorientation in space of suspended particles as well as themorphology of particles can be obtained. This paperexamines the utility of "in-line" laser holography todiscriminate the size and the morphology of sand particleseroded under turbulent shear flow during benthic sedimenttransport. The influence of a commercially availableadhesive polymer (xanthan gum, derived from the bacteriumXanthomonas campestris) on sediment stability andresuspended particle morphology is described. The majorimplications for carbon and sediment cycling withinestuaries are highlighted.