In this paper the calculation of the average sea level facilitated the calculation of coefficients of the conversion of data of the Dangantou Tide Station to the data of the Pearl River datum and the elevation of basic points in the reference datum was conversed to the Pearl River datum.

Investigation and Evaluation Heavy Metal Pollution in the Surface Sediments in Guangzhou Section of the Pearl River;

Characteristics of Nitrogen-Transformation Bacteria and Dissolved Inorganic Nitrogen in Pearl River Sediment;

Grain size distributional characteristics of the surface sediments in the Pearl River (Guangzhou section);