LA river 동영상 링크

http://www.youtube.com/watch?v=3ZkYlEryejY

http://www.metalocus.es/content/en/blog/rumble-and-sway

http://www.youtube.com/watch?v=GInoO_EYCeE

http://www.youtube.com/watch?v=wskXWlFVqRo&list=SPBFF748ACE3EFA04F

http://www.youtube.com/watch?v=Kqy8OkkOhY4




sedimentation 자료
http://www.co.portage.wi.us/groundwater/undrstnd/soil.htm