pubs.usgs.gov · pdf filestatic force which prevents the walls of the hole from collapsing. in...

1

Upload: hathuy

Post on 03-Feb-2018

214 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: pubs.usgs.gov · PDF filestatic force which prevents the walls of the hole from collapsing. In ... When water-bearing material is ... the sediments and fill the bucket