城市富营养湖泊沉积物中磷负荷及其释放对水质的影响

以南京玄武湖为研究对象，探讨了城市富营养湖泊沉积物中磷的分布、化学形态和负荷量：通过模拟实验深入研究了溶解氧、ｐＨ值、温度、扰动等环境因子对沉积物中磷的释放影响．进而得出磷释放速率．并对ｐＨ值影响作出校正，计算出沉积物中磷对湖水释放量，为玄武湖富营养化防治提供科学依据。

The Effects to WaterQuality of Phosphorus Loading and Its Rel ease in the Sediments of Urban Eutrophic Lakes

With Xuanwu Lake in Nanjing as the object,the distribution,chemical forms andloading of phosphorus in the sediments of urban eutrophic lakes were approached.Through a series of simulation tests, the effects to the release of phosphorus in the sediments caused by environmental factors such as DO,pH value,temperature and disturbance,were studied.Then therelease velocity of phosphorus was obtained,the effect of the pH value was corrected and the re-lease quantity of phosphorus in the sediments of the lake was calculated.This paper provides scientific basis for the prevention and control of eutrophication of Xuanwu Lake.