TY - JOUR
T1 - Estimating the spatial distribution of dredged material disposed of at sea using particle-size distributions and metal concentrations
AU - Okada, Tomonari
AU - Larcombe, Piers
AU - Mason, Claire
N1 - Funding Information:
We thank Deborah Snelling of the National Marine Aquarium and Tony Bale of Plymouth Marine Laboratory for supplying the current meter data, Sylvia Blake and Andrew Birchenough for supplying the data on dredged material, Jon Rees for supplying some flow data, Thi Bolam with detailing chemical analytical procedures and Naomi Greenwood, Peter Kershaw, Ruth Parker and Chris Vivian for their thoughtful comments. This work was performed under contracts AA005 and BA004 for the Marine Environment Division of Department for Environment, Food, and Rural Affairs in UK. Tomonari Okada’s contribution to this study was supported by the Scientist Exchange Programme of the Japanese Society for the Promotion of Science.
PY - 2009/8
Y1 - 2009/8
N2 - We present a method to estimate the spatial distribution of dredged material disposed of at sea. Using both dredged sediments and samples of sea-bed sediment from near the Rame Head disposal site, Plymouth, UK, we applied entropy analysis to the <63 μm sediment fraction and combined the results with the trace metal data in the same fraction, to form a series of groups. We interpret the distribution of sediments in one group (F1) to approximate the distribution of material affected by the disposal site. This distribution includes locations close to the disposal site, and also locations <4 km to the SE and SW, <6 km to the NW and <2 km to the N. This approach demonstrates the feasibility of using trace metal analysis of particular grain size fractions to reduce uncertainty in interpreting the spatial distribution of impacts of dredge disposal. Crown
AB - We present a method to estimate the spatial distribution of dredged material disposed of at sea. Using both dredged sediments and samples of sea-bed sediment from near the Rame Head disposal site, Plymouth, UK, we applied entropy analysis to the <63 μm sediment fraction and combined the results with the trace metal data in the same fraction, to form a series of groups. We interpret the distribution of sediments in one group (F1) to approximate the distribution of material affected by the disposal site. This distribution includes locations close to the disposal site, and also locations <4 km to the SE and SW, <6 km to the NW and <2 km to the N. This approach demonstrates the feasibility of using trace metal analysis of particular grain size fractions to reduce uncertainty in interpreting the spatial distribution of impacts of dredge disposal. Crown
KW - Disposal site
KW - Dredged material
KW - Entropy analysis
KW - Metal concentration
KW - Particle-size distribution
UR - http://www.scopus.com/inward/record.url?scp=67651121701&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2009.03.023
DO - 10.1016/j.marpolbul.2009.03.023
M3 - Article
C2 - 19464703
AN - SCOPUS:67651121701
SN - 0025-326X
VL - 58
SP - 1164
EP - 1177
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
IS - 8
ER -