@article{oai:kyutech.repo.nii.ac.jp:02000555,
 author = {厳島, 怜 and Itsukushima, Rei and 佐藤, 辰郎 and Sato, Tatsuro},
 issue = {5},
 journal = {土木学会論文集. B1, 水工学, Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)},
 month = {},
 note = {本研究は，花崗岩山地河川源頭部に出現する河床形態と河床勾配の関係及び階段状河床形態を構成するstep構造とその支配要因の関係を調べたものである．源頭部では，河床勾配に応じた河床形態の遷移が確認され，勾配が急な上流から下流に向けて，滝，cascade，step及び早瀬と優占する河床形態が変化した．また，階段状河床形態は，河床勾配やstep間隔とstep高の比によってstep-pool，step-早瀬，step-pool-早瀬の3形態に変化することを示した．step高とstep構成礫の最大径の関係は，反砂堆型とkeystone型で異なり，反砂堆型ではstep構成礫の最大径と摩擦速度が正の関係にあり，keystone型では，河床勾配及びstep幅と正の関係があることが明らかとなった．, The objective of this work was to investigate the relation between river-bed gradient and river bed configuration in a granitic headwater catchment. Further, we investigated the relationship between the step structure and controlling factors such as river course characteristics or slope angle of river bank. As a result of field survey, the transition of river bed configuration (transition of waterfall, cascade, step, and riffle from the upstream to the downstream) according to the river bed gradient was observed. The relation between the step height and maximum diameter of the step construction gravel was different between the antidune type and keystone type. In case of antidune type, maximum diameter of the step construction gravel was positively related with friction velocity. Whereas, maximum diameter of the step construction gravel of keystone type increased with the increment of river-bed gradient and step width.},
 pages = {I_1255--I_1260},
 title = {花崗岩山地源頭部における河床形態の出現特性と階段状河床形態の構造},
 volume = {74},
 year = {2018},
 yomi = {イツクシマ, レイ}
}