Distribution and Correlation between Total Content of Phosphorus,Iron and Organic Matter of Surface Sediment in Haihe River Mainstream

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.Correlation between the total content of phosphorus and iron,organic matter was analyzed with multiple linear regressions.It is demonstrated that the Haihe River surface sediment is mainly comprised of silt(54%) except Guanghua Bridge,whose size distribution is quite uniform.Total content of phosphorus,iron and organic matter of surface sediments in Haihe River mainstream are within the range of 29.00～78.99(μmol/g,) 595.67～719.91(μmol/g) and 3.77%～8.79% respectively.The total content of phosphorus,iron and organic matter of different sized sediments at the same cross-section does not show significant difference(P0.05).However,the total content of phosphorus,iron and organic matter at different cross-sections are significantly different(P0.01).Multiple linear regressions show that the correlation of total content of phosphorus and iron,organic matter is pretty good except at Jingang,Waihuanhe and Zhongxinqiao cross-sections.