2024-03-28T14:08:06Z
https://kitami-it.repo.nii.ac.jp/oai
oai:kitami-it.repo.nii.ac.jp:00008166
2022-12-13T02:21:42Z
1:86
FIELD OBSERVATION OF ANCHOR ICE FORMATION AND CONTAINED MATERIALS
アンカーアイスの平面分布と含有物質に関する現地観測
FIELD OBSERVATION OF ANCHOR ICE FORMATION AND CONTAINED MATERIALS
橋場, 雅弘
吉川, 泰弘
伊藤, 丹
黒田, 保孝
Anchor ice
Super cooling
Froude number
Spatial distribution
Algae, Material cycle
Anchor ice is a phenomenon to accumulate of frazil ice on the river bed. This is formed due to the super cooling and
a shallow, turbulent section of the river. But, it is a poorly understood and little studied topic. Our study focuses on
elucidate the material cycle of freezing river. We had a continuous observation of air temperature, water temperature,
water level and all day shooting of anchor ice formation using IP-camera during an anchor ice presence-absence
cycles. From the result, we found the critical element of anchor ice presence-absence is under super cooling condition.
We attempted to analyze two-dimensional flow calculation and spatial distribution of photo image analysis of an
anchor ice. As a result, we found spatial distribution of anchor ice is proportional to the Froude number.
We analyzed the contained materials of an anchor ice. As a result, a lot of algae (Hydrurus foetidus and diatoms)
existed in the anchor ice. We showed the possibility that anchor ice affected the material cycle of freezing river.
journal article
公益社団法人 土木学会
2014
application/pdf
土木学会論文集B1(水工学)
4
70
I_1279
I_1284
https://kitami-it.repo.nii.ac.jp/record/8166/files/2014.02_アンカーアイスの平面分布と含有物質に関する現地観測.pdf
jpn
http://doi.org/10.2208/jscejhe.70.I_1279
c 2014 公益社団法人 土木学会