On the quality of the sediments in the Suo-Nada region off Yamaguchi prefecture [Japan]
2005
Wanishi, A.(Yamaguchi-ken. Fisheries Research Center, Nagato (Japan))
The quality of the sediments and the near-bottom environment in the Suo-Nada off Yamaguchi prefecture were investigated seasonally from May 2002 to March 2004. Measured parameters such as chemical oxygen demand (COD), ignition loss (IL), total sulfide concentration (Total-S) and mud content (MC) correlated significantly to each other. Almost parameters showed relatively higher values especially in Tokuyama Bay, and lower values at sandy stations distributed in the western part of the region. The differences on the quality of the sediments between the past from 1972 to 1973 and present were little, even though some parts of the region were found to be more polluted.
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