Phosphorous distribution of the surface sediments of lakes in Hanyang district
汉阳湖群表层沉积物磷含量分布特征

Research on spatial distribution and seasonal difference of phosphorous contents in the surface sediments Hanyang Lakes including Lake Houguan, Lake Sanjiao, Lake Nantaizi, Lake Moshui and Lake Longyang in July and October, 2011 aimed at understanding pollution characteristic of the lake sediments and providing reference for pollution control and ecological restoration. It is concluded that: 1.The sediment phosphorous contents were the lowest(0.20±0.03g·kg-1) in Lake Houguan, and highest(0.64±0.11g·kg-1) in Lake Longyang. 2.Significant difference of phosphorous contents was shown between Lake Houguan and Lake Longyang(P<0.05), and not among Lake Sanjiao, Lake Nantaizi and Lake Moshui(P>0.05). 3.Seasonal difference of phosphorous contents for most Hanyang Lakes was insignificant except Lake Houguan(P<0.05). 4.Clear spatial distribution patterns of sediment phosphorous mainly caused by exogenous pollution were observed in Hanyang Lakes. 5.Correlation analysis indicated that total phosphorous of sediments had significant positive correlation with total nitrogen, total phosphorous, and conductivity of water(P<0.01), and significant negative correlation with water transparency(P<0.01).