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ID 30182
file
title alternative
Dispersion of the small particles in the high turbidity water from sea sand mining boat
creator
Tada, Kuninao
Wada, Sayaka
Ichimi, Kazuhiko
subject
海砂採取
拡散計算
透明度
操業間隔
sand mining
dispersion model calculation
Secchi disk depth
operation interval
NDC
Earth sciences. Geology
abstract
海砂利採取船からの高濁度排水中の微粒子の拡散状況を簡単な数値モデルで計算した。高濁度水排出地点では透明度の低下が著しいことが明らかになった。2日に一度の操業を繰り返した場合, 影響範囲は広範囲に拡がることが明らかになった。海砂採取による影響を最小限に抑えるためには, 5日以上の間隔で操業することが必要であることが示唆された。
abstract
The dispersion situation of the small particles in the high turbidity waters from sea sand mining boat was calculated using a simple numerical model. The transparency (Secchi disk depth) decreased remarkably near the discharge spot of high turbidity waters. When the operation of sea sand mining at intervals of two days was repeated, it was clear that the influence area of high turbidity waters spreaded widely. To suppress influence of sea sand mining in a minimum, it was suggested that the operation of sea sand mining at intervals of five days and above should be done.
journal title
Journal of the Graduate School of Biosphere Science, Hiroshima University
volume
Volume 45
start page
31
end page
36
date of issued
2006-12-20
publisher
広島大学大学院生物圏科学研究科
issn
1348-1371
ncid
SelfDOI
language
jpn
nii type
Departmental Bulletin Paper
HU type
Departmental Bulletin Papers
DCMI type
text
format
application/pdf
text version
publisher
department
Graduate School of Biosphere Science
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