PMID- 11258831
OWN - NLM
STAT- MEDLINE
DCOM- 20010405
LR  - 20190822
IS  - 0048-9697 (Print)
IS  - 0048-9697 (Linking)
VI  - 266
IP  - 1-3
DP  - 2001 Feb 5
TI  - Mapping and monitoring contaminated-sediment geometry and stability.
PG  - 33-9
AB  - Environment Canada's National Water Research Institute (NWRI) conducts research 
      on freshwater contaminated sediments, much of which is focused on designated 
      areas of concern in the Great Lakes and their connecting channels. This paper 
      reviews new acoustic and video equipment and procedures developed to map the 
      geometry and stability of the sediments, and describes their applications. A 
      RoxAnn acoustic seabed-classification system is used for mapping bottom-sediment 
      types and locating the deposits of fine-grained sediments with which contaminants 
      are associated. The system uses the acoustic properties of sediments to 
      distinguish textural types ranging from mud to boulders, and displays the data as 
      they are collected. The sediment thickness is measured with a weighted 
      video-acoustic tripod which is lowered into the sediments to refusal, and which 
      recorded penetration with a video camera or an echosounder transducer. The 
      stability of the contaminated sediments was monitored with a bottom-mounted, 
      high-precision echo sounder-digitizer, which logs changes in the position of the 
      sediment-water interface produced by erosion or deposition. The same procedure 
      can be used in capping or dredging projects to track bottom changes as they 
      occur, or they can be measured by pre- and post-project mapping of bathymetry and 
      morphology with sweep-sonar or side-scan sonar equipment. The new equipment and 
      procedures have been successfully applied to a number of areas of concern in the 
      Great Lakes basin. They provide a faster and more detailed characterization of 
      sediment properties and geometry than was previously available, and have been 
      particularly effective in optimizing sampling surveys and monitoring remediation 
      projects.
FAU - Rukavina, N
AU  - Rukavina N
AD  - National Water Research Institute, Environment Canada, Burlington, Ontario. 
      norm.rukavina@cciw.ca
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, Non-P.H.S.
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
SB  - IM
MH  - Animals
MH  - Environmental Monitoring/*methods
MH  - Environmental Pollution/prevention & control
MH  - Geologic Sediments/*chemistry
MH  - Particle Size
MH  - Video Recording
MH  - Water Movements
EDAT- 2001/03/22 10:00
MHDA- 2001/04/06 10:01
CRDT- 2001/03/22 10:00
PHST- 2001/03/22 10:00 [pubmed]
PHST- 2001/04/06 10:01 [medline]
PHST- 2001/03/22 10:00 [entrez]
AID - S0048-9697(00)00738-5 [pii]
AID - 10.1016/s0048-9697(00)00738-5 [doi]
PST - ppublish
SO  - Sci Total Environ. 2001 Feb 5;266(1-3):33-9. doi: 10.1016/s0048-9697(00)00738-5.