Morphodynamic equilibrium of alternate bar dynamics under repeated hydrographs
Morphodynamic equilibrium of alternate bar dynamics under repeated hydrographs
复制标题
重复过程线下交替杆动力学的形态动力学平衡
DOI:
10.1016/j.advwatres.2023.104427
复制
发表时间:
2023
影响因子:
4.7
通讯作者:
Shimizu Y.
中科院分区:
文献类型:
--
作者:
Huang D.;Iwasaki T.;Yamada T.;Hiramatsu Y.;Yamaguchi S.;Shimizu Y.
Discharge unsteadiness plays a key role in the dynamics of alternate bars, however, how migrating alternate bars determine their shape under unsteady discharge conditions, especially in the long-term, is still unclear. In this study, we numerically investigate long-term behaviors of migrating alternate bars subject to repeated hydrographs. For this, the same discharge variation but different hydrograph cycles were tested. The results show that even under unsteady flow conditions, specific combinations of hydrograph cycles and discharge variations result in an equilibrium state of migrating alternate bars (i.e., non-time dependent wavelength and migration period). This may be a unique feature of the alternate bar morphodynamics, since dynamic equilibrium state arising from steady discharge counterparts is time-dependent feature. Meanwhile, it is observed that when the discharge changes abruptly, the response of alternate bar morphodynamics changes along the time. Within a limited period, the response of alternate bars is not strong enough to destroy the original wavelength, suggesting that the hydrograph cycle that achieves this equilibrium state must be moderately long such that the timescale of the hydrograph is similar but slightly smaller than the bar growth.
登录
查看更多内容
DOI:
10.2208/prohe.46.725
发表时间:
2002
期刊:
Doboku Gakkai Ronbunshuu B
影响因子:
--
作者:
Yasuharu Watanabe;Kôji Sato;Fumiaki Oyama
通讯作者:
Fumiaki Oyama
影响因子:
5.4
作者:
D. Furbish
通讯作者:
D. Furbish
DOI:
--
发表时间:
2006
期刊:
River Flow2006,Proceedings of International Conference on Fluvial Hydraulics, LISBON, PORTUGAL
影响因子:
--
作者:
K.Kobayashi;Y.Shimizu;S.Giri
通讯作者:
S.Giri
影响因子:
5.4
作者:
Y. Shimizu;S. Giri;S. Yamaguchi;J. Nelson
通讯作者:
Y. Shimizu;S. Giri;S. Yamaguchi;J. Nelson
DOI:
--
发表时间:
2022
期刊:
高橋則夫先生古稀祝賀論文集(成文堂)
影响因子:
--
作者:
葛野尋之;中川孝博;渕野貴生(編);緑大輔;斎藤司;石田倫識;正木祐史;笹倉香奈;伊藤睦;黒川亨子;関口和徳;高平奇恵;松倉治代;丸橋昌太郎;神例康博;大塚裕史先生古稀記念編集委員会;山口厚ほか編;小田直樹;Nobuhiko Furukawa;丸橋昌太郎;岡田幸之;古川伸彦;小田直樹
通讯作者:
小田直樹