Dredging Methods in the US and South Korea Pierre Y. Julien Colorado State University World Water...
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Transcript of Dredging Methods in the US and South Korea Pierre Y. Julien Colorado State University World Water...
Dredging Methods in the US and South Korea
Pierre Y. JulienColorado State University
World Water ForumDaegu, April 2015
• Dipper Dredge, NY, USACE
Clamshell Dredge
• Mystic River Clamshell Dredge, New England District, USACE
Hopper Dredge
Dustpan Dredge
Cutterhead Dredge
• Closed-nose Basket Cutterhead Dredge, Delaware River, USACE
• Open-nose Basket Cutterhead Dredge, Savannah River , USACE
Disposal site for dredged material
From JulienRiver MechanicsCUP 2002
• Middle Rio Grande, NM, USBR
• Middle Rio Grande, NM, USBR
• Middle Rio Grande, NM, USBR
River Widening and RetrofittingNakdong River near Busan, South Korea
Pusan city
Nakdong River
Gupo bridge
NREB
Nakdong River Estuary Barrage
• from Ji et al. ASCE-JHE, Nov. 2011
Nakdong River Estuary Barrage
16 weirs were constructed under the Four River Restoration Project (2009-2012)
After the construction of weirs, sedimentation problems have been occurring upstream of Weirs
Feb. 3rd, 2014
Problem Statement
Ipo Weir 10 km upstream (Jun. 18th, 2012)
• From Hwayoung Kim, PhD research at CSU, 2016
24
Thank you.Questions?
• Photo of Sangju Weir in South Korea from Hwayoung Kim