Sequential monitoring of beach litter using webcams

被引：66

作者：

Kako, Shin'ichiro ^{[1
]}

Isobe, Atsuhiko ^{[1
]}

Magome, Shinya ^{[2
]}

机构：

[1] Ehime Univ, Ctr Marine Environm Studies, Matsuyama, Ehime 7908577, Japan

[2] Sanyo Techno Marine Inc, Chuo Ku, Tokyo 1030012, Japan

来源：

MARINE POLLUTION BULLETIN | 2010年 / 60卷 / 05期

关键词：

Beach litter; Webcams; Real-time and sequential monitoring; MARINE DEBRIS; SEA;

D O I：

10.1016/j.marpolbul.2010.03.009

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study attempts to establish a system for the sequential monitoring of beach litter using webcams placed at the Ookushi beach, Goto Islands, Japan, to establish the temporal variability in the quantities of beach litter every 90 min over a one and a half year period. The time series of the quantities of beach litter, computed by counting pixels with a greater lightness than a threshold value in photographs, shows that litter does not increase monotonically on the beach, but fluctuates mainly on a monthly time scale or less. To investigate what factors influence this variability, the time derivative of the quantity of beach litter is compared with satellite-derived wind speeds. It is found that the beach litter quantities vary largely with winds, but there may be other influencing factors. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：775 / 779

页数：5

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