This paper takes the sediments of Dianchi Lake as the research object.The results show that the total phosphorus content in the sediments of Dianchi Lake is relatively high,and the spatial variation is large,ranging f...This paper takes the sediments of Dianchi Lake as the research object.The results show that the total phosphorus content in the sediments of Dianchi Lake is relatively high,and the spatial variation is large,ranging from 1,193.94 to 4,629.25 mg/kg.The spatial distribution characteristics of total phosphorus in the sediments of Dianchi Lake have obvious regional differences.The average content of total phosphorus in the sediments of Dianchi Lake is 2,184.39(+579.09 mg/kg),and the TP(Total Phosphorus)content in the areas over 60%of the lake is higher than 2,000 mg/kg,which is in heavily flat.By analyzing the distribution of phosphorus forms in surface sediments of different areas of Dianchi Lake,it can be concluded that the difference is significant.The relationship between the phosphorus contents of different forms is HCl-P>NaOH-rP>NaOH-nrP>Res-P>BD-P.Through summarizing the characteristics of different phosphorus distribution in the sediments of Dianchi Lake,this paper concludes that the sustained release of endogenous phosphorus load will be an important factor to delay the ecological health recovery time of Dianchi Lake and offset the effect of exogenous treatment.展开更多
文摘This paper takes the sediments of Dianchi Lake as the research object.The results show that the total phosphorus content in the sediments of Dianchi Lake is relatively high,and the spatial variation is large,ranging from 1,193.94 to 4,629.25 mg/kg.The spatial distribution characteristics of total phosphorus in the sediments of Dianchi Lake have obvious regional differences.The average content of total phosphorus in the sediments of Dianchi Lake is 2,184.39(+579.09 mg/kg),and the TP(Total Phosphorus)content in the areas over 60%of the lake is higher than 2,000 mg/kg,which is in heavily flat.By analyzing the distribution of phosphorus forms in surface sediments of different areas of Dianchi Lake,it can be concluded that the difference is significant.The relationship between the phosphorus contents of different forms is HCl-P>NaOH-rP>NaOH-nrP>Res-P>BD-P.Through summarizing the characteristics of different phosphorus distribution in the sediments of Dianchi Lake,this paper concludes that the sustained release of endogenous phosphorus load will be an important factor to delay the ecological health recovery time of Dianchi Lake and offset the effect of exogenous treatment.