Study on the endogenous phosphorus load of sediments in Miyun reservoir

查看全文 作　　者：XU Qing, LIU Xiaoduan, WANG Huifeng, LIU Liu & LIU Jingying National Research Center of Geoanalysis, Beijing 100037, China;The Occupational Disease Research Institute of Beijing, Beijing 100020, China;College of Maths, Jilin University, Jilin 130026, China 出　　处：《Science China Earth Sciences》索引2005年第48卷第z2期,共8页 摘　　要：Based on the research into the physical-chemical properties and distribution of sediments and the characteristics of pore water in sediments of Miyun reservoir, the release flux of the total phosphorus (TP) from sediments is estimated by simulating deposit environment of reservoir bottom in laboratory. They are 0.018 mg·cm-2·d-1 and 0.821 mg·cm-2·d-1 at 2℃ and 8℃ respectively. The gross TP released in a year is 11.34t. As a contrast, the pore water diffusion simulation method is used to measure gross TP released and gains 11.56t. The two results are relatively close and prove that experiment simulation has some reliability. On the basis of experiments, some conclusions can be drawn: (1) Endogenous phosphorus from sediments accounts for 27.9 percent of the TP entering the reservoir, and it cannot be ignored; and (2) increasing temperature is helpful to TP releasing from sediments. 关 键 词：sediment, PORE water, total phosphorus, ENDOGENOUS PHOSPHORUS load, Miyun reservoir.