贵州百花湖沉积物磷、氮及有机碳的空间分布特征

Spatial distribution of TP,TN and C_(org) in the sediment of Baihua Lake

采集贵州百花湖沉积物柱芯,测定沉积物总磷(TP)、总氮(TN)和有机碳(Corg)含量,并进行TP、TN及Corg含量相关性分析.结果表明,百花湖沉积物TP、TN及Corg含量平均值分别为976 mg.kg-1,0.34%、2.91%,表层沉积物污染严重,随着沉积物深度的增加沉积物TP、TN及Corg含量逐渐降低.不同沉积物柱芯相同层位TP、TN及Corg含量存在较大差别,表明不同湖区底泥污染程度存在较大差异,在实施内源污染控制工程时需充分考虑这一特点,对不同湖区采用不同的治理与控制措施.

Sediment cores were collected in the Baihua Lake,Guizhou.Total phosphorus（TP）,total nitrogen（TN） and organic carbon（Corg） contents in different sediment layers were measured,and their correlations were analyzed.The results showed that TP contents averaged 976 mg·kg-1,and TN and Corg contents were 0.34% and 2.91% respectively.There was a large variation in the contents of TP,TN and Corg in the same layers of different cores.With the increase of sediment depth,contents of TP,TN and Corg in the sediments decreased gradually.