Quantcast Figure 9. Cumulative grain size distribution (by weight) curves for pre- and post-dredged material samples after mechanical dredging

 

Order this information in Print

Order this information on CD-ROM

Download in PDF Format

     

Click here to make tpub.com your Home Page

Page Title: Figure 9. Cumulative grain size distribution (by weight) curves for pre- and post-dredged material samples after mechanical d...
Back | Up | Next

Click here for a printable version

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Combat
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
USMC
   
Products
  Educational CD-ROM's
Printed Manuals
Downloadable Books
   

 

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Back
Figure 8. Comparison of pre-dredged and post-dredged vane shear strengths
Up
doerd2
Next
Table 6. Physical Properties of Ocean-Placed Sediment Samples
ERDC TN-DOER-D2
September 2004
Figure 9.
Cumulative grain size distribution (by weight) curves for pre- and post-dredged material sam-
ples after mechanical dredging
VARIABILITY DUE TO DREDGED MATERIAL PLACEMENT: In addition to the influence
of spatial variability and dredging operations, the properties of dredged material may change
depending on their final placement or disposal. Variability will be encountered in the placement
process due to the methods and equipment used. For example, sediments transported via pipeline
are layered differently than those placed by clamshell bucket. Also, the placed sediment likely
mixes with native sediment, which changes its properties and subsequent engineering behavior.
Open Ocean Placement. To make a general comparison between properties of pre-dredged
and post-placed sediments deposited at an open (unconfined) ocean site, pre-dredged material
sampled from the Gulf Coast's Mobile Bay was compared to previous data where similar mate-
rial was placed at an open ocean site near the entrance to Mobile Bay (Davis et al. 1999). The
fine-grained material was dredged with a clamshell bucket dredge, transported via split-hull
barge scows, and dumped through an approximate 30-ft (10-m) water column onto a sandy ocean
floor, which had a mean grain size (by weight) of 0.21 mm. Tables 5 and 6 list some of the geo-
technical properties of the pre-dredged and post-placed samples. Figure 10 shows the grain size
distributions.
Table 5
Median and Mean Grain Size (by weight) for Ocean-Placed Sediment Samples
Sample
Median, mm
Mean, mm
Pre-dredged (Mobile Bay)
0.001
0.013
Post-placed (open ocean)
0.015
0.077
9

Privacy Statement - Press Release - Copyright Information. - Contact Us - Support Integrated Publishing

Integrated Publishing, Inc.