A simple system for laser-illuminated video imaging of sediment suspension and bed topography

被引：24

作者：

Crawford, AM ^{[1
]}

Hay, AE

机构：

[1] Mem Univ Newfoundland, Dept Phys & Phys Oceanog, St Johns, NF A1B 3X7, Canada

[2] Dalhousie Univ, Dept Oceanog, Halifax, NS B3H 4J1, Canada

来源：

IEEE JOURNAL OF OCEANIC ENGINEERING | 1998年 / 23卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

bed topography; sediment suspension; video imaging;

D O I：

10.1109/48.659445

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

A simple underwater video system has been developed for simultaneously imaging sediment suspension and monitoring bed profiles under waves and combined wave-current hows, This consists of a diode-laser-generated light plane and a a black-and-white underwater video camera, The laser light illuminates suspended material in section and also provides a bed profile at the bottom, Orthogonal laser/camera pairs are used to obtain both cross-shore and alongshore views. During deployments, the system has been augmented by acoustic backscatter devices for measurement of sediment concentration, As with all video techniques, visibility is a limiting factor, but where turbidity is low to moderate, the results are encouraging, Results on cross-shore and alongshore bed elevation variations and suspension event scales obtained with the video/laser system are presented for two experiments: one at the National Research Council wave Research Flume in Ottawa, Canada, and the other in the field at Queensland Beach, N.S., Canada.

引用

页码：12 / 19

页数：8

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