Quantcast Status of Current Hopper and Bin Measurement Technologies

 

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: Status of Current Hopper and Bin Measurement Technologies
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
Up
doert6
Next
MEASUREMENT IN THE PIPELINE
ERDC TN-DOER-T6
September 2004
Status of Current Hopper and
Bin Measurement Technologies
PURPOSE: Research to improve dredging contract management, economics (cost
optimization), and contaminated sediments management (document dredging and placement
locations) is currently being conducted by the Innovative Technologies (IT) Focus Area of the
U.S. Army Corps of Engineers (USACE) Dredging Operations and Environmental Research
(DOER) Program. A common element in these research efforts is the ability to measure dredge
production with the Silent Inspector (SI). This technical note (TN) describes currently used
hopper and bin production measurement methods and discusses their respective capabilities and
limitations. In this TN, the term hopper is defined as the holding space for dredged material in a
hopper dredge, and the term bin identifies the holding space of a barge or scow. Subsequent
DOER technical notes will refer back to this document as a basis for defining system
requirements in the development of improved hopper and bin measurement technologies.
BACKGROUND: The DOER Innovative Technologies Focus Area is currently conducting
research to develop and demonstrate robust hopper and bin instrumentation and data analysis
techniques to quantify dredged material for assessing dredge performance. Corps dredging
operations are in transition to automated monitoring of contract dredge operation (Rosati 1998,
Welp and Rosati 2000, Rosati and Prickett 2001). The routine use of Silent Inspector (SI) data
has focused attention on the accuracy of production measurement. Analysis of hopper dredge
total production data errors clearly indicates that the largest uncertainty is measurement of
dredged material in the hopper (Rullens 1993, Rokosch 1989, Scott 2000). The U.S. Army
Engineer Research and Development Center (ERDC) worked with USACE Districts and
dredging contractors to investigate the performance of existing hopper and bin measurement
systems. Results from this investigation are being used to define a set of system requirements
for improving hopper and bin measurement.
In addition to hydrographic surveying before and after dredging, there are two ways of
determining hopper dredge production: measurement in the pipeline and measurement in "means
of conveyance" (Rullens 1993). Production is based on the quantity of solids transported by the
dredge. Production determined by hydrographic survey provides performance quantities relative
to the sediment's in situ mass characteristics (i.e., bulk density, etc.). It is desirable to relate
quantities of solids measured in the pipeline and means of conveyance to the "in situ solids
quantity," but sediment bulking influences these relationships.
A bulking factor is the ratio of the volume occupied by a given mass of dredged material in
either a hopper or bin immediately after deposition by a dredging process, to the volume
occupied by the same mass of sediment in situ.  Sediment material, mass, and behavior
characteristics, and different types of dredges and dredging techniques affect bulking. Granular
materials may increase or decrease volume, depending on the initial density state (loose or

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

Integrated Publishing, Inc.