The recommended project of diversion of water from Changjiang River to Huaihe River is a water allocation programe which involve both Changjiang River and Huaihe River.Water quality of Wabuhu Lake is one of the attentive environment problem of the project.The paper analyze the difference of phosphorus release between dried and fresh sediment from Wahuhu Lake

discusses the effects of environmental conditions(P concentration of overlaying water

illumination

pH

temperature

DO

microorganism and disturbance) on the experiment of P release.The results are showed that:the capability of P release in fresh sediment was obvious than of dried sediments;the P concentration of overlaying water has stronger function to adjust the P release of sediments;the effect of illumination to P release of sediments is not obvious;high temperature profits sediment P released to water

and the maximum is concerned with the increase of temperature;the amount of sediment P released can get the maximum rapidly under the stirring condition;the changes of DO and pH increase the capability of P released in various degree.The character of sediment P released and the hydrology of the Wabuhu Lake make the geochemistric behavior of P release realize easily for the project of diversion of water.