Deep water sampling device was used to collect surface sediments from Haihe River mainstream,and total content of phosphorus,iron and organic matter of surface river sediments with different sizes at eight cross-sections were examined.

Pollutants accumulation from Haihe river mainstream and adjacent sea built heavy pressure up to region eco-environment.

The characteristics of temporal and spatial distribution of heavy mental(Cu,Zn,Pb,Cd,Hg,As,Ni,Cr)in the surface sediment of haihe river had been analysed.

DDTs concentrations in surface water and sediment were measured from August 2007 to March 2008 in the mainstream of Haihe River.

Hexachlorocyclohexane isomers(HCHs)concentrations in surface water and sediment were measured from August 2007 to March 2008 in the mainstream of Haihe River.

The relationship bettveen nitrogen contamination and dissolved oxygen in mainstream of the Huaihe River;

Hydroelectric exploitation on the main stream of the Yellow River in Gansu Province and Regional Economic Development;

The present situation of the pollutants received by the main stream of the Yellow River and the change of the quantity are analyzed by comparison of the investigation result for 1998 with that for 1993.

Study on comprehensive regulation measures of the Main Stem Tarim River——Channel regulation and water transport measures for eco-environment;

Study on comprehensive regulation measures of the Main Stem Tarim River——Fluvial Processes;