Geochemical characteristic of hydrocarbon compounds in the Hangzhou Bay

The source and distribution of the organic pollutants such as the oil, n-alkanes,aromatic,and the pesticide in the water column, suspended particulates and surface sediments in the Hangzhou Bay (HB) during winter 1987 and summer 1988 are studied with analytical method of fluorometry, GC, LC, GC-MS, etc.
The influence of the tide and salinity on the distribution of dissolved and paniculate organic matter is investigated in this paper. The data show that the highest content of suspending silt, organic matter, and chemical oxygen demand (COD) occurs at salinity 15. This results from the fact that the water front limits the transfer and dispersion of the matter in different water mass, and enriches the suspending silt and organic matter in water column.
The running direction of the oil-content equivalue lines is similar to that of the water front, and interrelated closely with the terrestrial materials from the Changjiang River.