東海南部陸棚沉積物受台灣河川輸出影響之研究
Date Issued
2003
Date
2003
Author(s)
DOI
912611M002011
Abstract
Rivers in Taiwan are characterized by very high sediment export flux to the
shelf. A combined total annual river suspended sediment flux of approximately 380
million tons/year from rivers in Taiwan is almost as much as that by the entire
Mississippi River in US. Yet no data are available concerning the final deposition of
these tremendous amount of suspended sediment exported from the island of Taiwan
to the East China Sea continental shelf region. No information is available
concerning sediment distribution, transport and deposition on the surrounding shelf
regions. This research evaluates contributions of solid materials exported from
rivers in Taiwan by studying the sediment geochemical properties and their spatial
variations on the Southern East China Sea continental shelf.
Surface sediments were collected and analyzed for their chemical properties,
including metals (Al, Fe, Mn, Cu, Zn, Pb, Cd), organic carbon, carbonate content, and
grain sizes. The results showed that rivers in Taiwan are exporting solid materials to
the adjacent East China Sea and registered strong signature on surrounding areas.
Sediments near the Tanshui river were characterized by low Al, extremely high Mn,
high Fe, Pb and relatively high Zn as compared to those away from Taiwan region and
those near the Fujin. In addition, data also indicated that part of the solid materials
from Taiwan were transported away from shelf.
Subjects
East China sea
sediment
asian river
heavy metal
Publisher
臺北市：國立臺灣大學海洋研究所
Type
report
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