[Simulation and model computation on dynamic release of nutrition factors of bottom mud in Taihu Lake].

The dynamic release of bottom mud in Taihu Lake was simulated indoors in an annular tank. The rules of starting principle, resuspension and release rate of bottom mud were analyzed under different kinds of disturbing intensity. The velocity of flow was basically uniform in the annual tank. Both the rotation rate of the tank and the velocity of flow can be controlled precisely. The relational expression between the release rate of TN, TP (y) and flow velocity (x) was calculated on the basis of the relationship between them. The calculated result from the model of ECOMSED conforms to the observation data in Taihu Lake very well. Because the conflict of field observation data in time and space greatly influences the accuracy of model parameters, simulating the dynamic release of bottom mud indoors is very important to the cure of eutrophication in Taihu Lake.