Dredging Methods in the US and South Korea Pierre Y. Julien - PDF document

4/9/2015 Dredging Methods in the US and South Korea Pierre Y. Julien Colorado State University World Water Forum Daegu, April 2015 • Dipper Dredge, NY, USACE Clamshell Dredge 1

4/9/2015 • Mystic River Clamshell Dredge, New England District, USACE Hopper Dredge 2

4/9/2015 Dustpan Dredge Cutterhead Dredge 3

4/9/2015 • Closed-nose Basket Cutterhead Dredge, Delaware River, USACE • Open-nose Basket Cutterhead Dredge, Savannah River , USACE 4

4/9/2015 Disposal site for dredged material 5

4/9/2015 From Julien River Mechanics CUP 2002 • Middle Rio Grande, NM, USBR 6

4/9/2015 • Middle Rio Grande, NM, USBR • Middle Rio Grande, NM, USBR River Widening and Retrofitting Nakdong River near Busan, South Korea 7

4/9/2015 Nakdong River Estuary Barrage Nakdong River Estuary Barrage • from Ji et al. ASCE-JHE, Nov. 2011 Problem Statement  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. 3 rd , 2014 Ipo Weir 10 km upstream (Jun. 18 th , 2012) • From Hwayoung Kim, PhD research at CSU, 2016 Thank you. Questions? • Photo of Sangju Weir in South Korea from Hwayoung Kim 24 8