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);

Influences of saline water intrusion on environmental elements in outlet section of Zhujiang River;

An overall RAPD analysis of DNA of grass carp population located in three-river waters (Yangtze River, Zhujiang River and Helongjiang River) and Taihu Lake in China was made with 120 primers of random decamer oligonucleotide, for the purpose of identifying the genome composition and investgating the affinity of these grass carp populations.

There is only one submerged delta on the shelf outside the estuary of Zhujiang River with an area of about 30 000km2 which is 3.

Particle-scale distribution of polycyclic aromatic hydrocarbons in highly contaminated sediments of the Guangzhou channel of the Pearl River;

Grain-size distribution of polychlorobiphenyls in sediments of the Pearl River;

PF Unit Protozoan Community Characteristics and the Relation with the Water Quality in the Guangzhou Reach of the Pearl River;

Analysis on Karst rocky desertification in upper reaches of Pearl River based on remote sensing;

In order to probe environmental effect and ecological security of upper reaches of Pearl River,the author chooses Guanling autonomous county of the Buyi and Miao as a base of research and comprehensively assets activities of this region since 1978 from the angle of historical and present situation by using mathematic model and AHP.

Assessment of the water quality by fuzzy mathematics for last 20 years in Zhujiang Estuary;

Effect of economic development on water quality in Zhujiang Estuary;

Distribution characteristics, transfer mechanism and pollution assess of heavy metal vanadium, nickel and cobalt in sediment cores of the Zhujiang Estuary.;