TY - GEN
T1 - Impacts of sediment transport due to the kumamoto earthquakes on an intertidal flat at the mouth of the Shirakawa river, Japan
AU - Tai, Akira
AU - Fattori, Keitaro
AU - Akamatsu, Yoshihisa
AU - Yamamoto, Koichi
AU - Komorita, Tomohtro
AU - Inui, Ryutei
AU - Nihei, Yasuo
N1 - Publisher Copyright:
© Proceeding of the 21st LAHR-APD Congress 2018. All rights reserved.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - Landslides frequently occurred in the Shirakawa basin due to the Kumamoto earthquakes occurred in 2016, a large amount of sediment flowed into the river channel of Shirakawa River. They were deposited on an intertidal flat at the mouth of the Shirakawa River. That is concerned about the influence on the water environment and the fishery industry. Therefore, in this study, in order to examine the influence of the sediment on the intertidal flat at the mouth of the Shirakawa River, we conducted a field survey and estimated the state of the river sediment budget. Regarding the field survey, we conducted grain size analysis and bed elevation survey on the intertidal flat at the mouth of the Shirakawa River. As for the estimation of the state of the river sediment budget, we estimated the amount of bedload using turbidity data. The results showed that the sediment deposited was fine. As for the ground height on the intertidal flat at the mouth of the Shirakawa River, the period from May to July was rising, however, the period from July to January was declining. Regarding the estimation of the state of the river sediment budget, the amount of sediment that flowed into the intertidal flat due to the flood of last year contains a large suspended load and it was about 10 times compared with the whole year of it.
AB - Landslides frequently occurred in the Shirakawa basin due to the Kumamoto earthquakes occurred in 2016, a large amount of sediment flowed into the river channel of Shirakawa River. They were deposited on an intertidal flat at the mouth of the Shirakawa River. That is concerned about the influence on the water environment and the fishery industry. Therefore, in this study, in order to examine the influence of the sediment on the intertidal flat at the mouth of the Shirakawa River, we conducted a field survey and estimated the state of the river sediment budget. Regarding the field survey, we conducted grain size analysis and bed elevation survey on the intertidal flat at the mouth of the Shirakawa River. As for the estimation of the state of the river sediment budget, we estimated the amount of bedload using turbidity data. The results showed that the sediment deposited was fine. As for the ground height on the intertidal flat at the mouth of the Shirakawa River, the period from May to July was rising, however, the period from July to January was declining. Regarding the estimation of the state of the river sediment budget, the amount of sediment that flowed into the intertidal flat due to the flood of last year contains a large suspended load and it was about 10 times compared with the whole year of it.
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M3 - Conference contribution
AN - SCOPUS:85063989613
T3 - Proceedings - International Association for Hydro-Environment Engineering and Research (IAHR)-Asia Pacific Division (APD) Congress: Multi-Perspective Water for Sustainable Development, IAHR-APD 2018
SP - 417
EP - 424
BT - Proceedings - International Association for Hydro-Environment Engineering and Research (IAHR)-Asia Pacific Division (APD) Congress
A2 - Ahmad, Johan Syafri Mahathir
A2 - Olii, Muhammad Ramdhan
A2 - Setiawan, Hendy
A2 - Legono, Djoko
A2 - Hairani, Ani
A2 - Hambali, Roby
A2 - Benazir, null
A2 - Warniyati, Warniyati
A2 - Karlina, null
PB - Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada
T2 - 21st Congress of International Association for Hydro-Environment Engineering and Research-Asia Pacific Division: Multi-Perspective Water for Sustainable Development, IAHR-APD 2018
Y2 - 2 September 2018 through 5 September 2018
ER -