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ID 46758
本文ファイル
別タイトル
Geoscience Teaching Using Local Geological Materials (8): Features of composition, shape, and size of river bed gravels of the Ashida-gawa River in Hiroshima prefecture from the aspect of terrain property in the southern part of Chugoku district
著者
山崎 博史 大学院教育学研究科 広大研究者総覧
梶原 周作
吉冨 健一 大学院教育学研究科 広大研究者総覧
キーワード
Ashida-gawa Rive
stepped terrain
river sediment
function of running water
芦田川
階段状地形
河床堆積物
流水の働き
NDC
教育
抄録(英)
The significance of conservation of geodiversity in global environmental conservation has found attention in Japan in recent years. The water and rock cycles, as a part of the supracrustal cycle of materials, have a crucial role in the formation and conservation of geodiversity. The 5th grade science curriculum includes a description of an ideal model on the function of running water in rivers, where it is theorized that gravel in the river become smaller and rounder as they travel farther from the river head. However, the situation of many rivers in this respect do not fit well into the ideal model. Therefore, in the light of the need to acquaint students with actual conditions in rivers, it is necessary to collect actual data on the effect of running river water on gravel, for inclusion in these curriculums. In this study, we determined the compositions, grain sizes, and shapes of river gravels at seven localities along the Ashidagawa River in the eastern part of Hiroshima Prefecture. We explored the relationship between the features of the gravels and the geology and geomorphology of the river basin. The results indicate the following: 1) Channel morphology can affect gravel composition; 2) the size and roundness of gravel varies as a function of channel slope; and 3) it is necessary to consider that huge boulders are transported by running water only with difficulty and are, thus, rounded on site by sediment particles suspended in the running water. The topography of the southern part of the Chugoku region, through which the Ashida-gawa River runs, is characterized by a stepped terrain, unlike that in an ideal model. Therefore, the features of the gravel in the Ashida-gawa River are typical examples of those of bed sediments of a river running through a stepped terrain.
内容記述
本研究の一部は日本学術振興会科研費JP16K00966,JP17H00820の助成を受けて行われた。
掲載誌名
広島大学大学院教育学研究科紀要. 第二部, 文化教育開発関連領域
67号
開始ページ
1
終了ページ
8
出版年月日
2018-12-21
出版者
広島大学大学院教育学研究科
ISSN
1346-5554
NCID
言語
日本語
NII資源タイプ
紀要論文
広大資料タイプ
学内刊行物(紀要等)
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
部局名
教育学研究科
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