Establishment And Application Of Total Phosphorus Prediction Model Of Channel Reservoir

At first, the research situations and significance about the total phosphorus prediction model of channel reservoir are presented. The conception and the harm of eutrophication are introduced, and the necessary of phosphorus controlling in lakes and reservoirs is shown.Moreover, beginning with rules of transition and inversion of nutritious element-phosphorus and unique hydrologic and hydraulic conditions, premise is demonstrated, which is about epitomizing channel reservoir according to its characters in different periods of a hydrologic year, and establishing combined model with two different coordinates. Basing on these analysis, channel reservoir is epitomized as a 2-D X-Y-coordinate straight river model with a steady pollution source in ample-flow period, and a polar coordinate stilling basin diffusing model in average-flow period and dry-weather period. These two models are combined as the total phosphorus prediction model of channel reservoir. At the same time, nature of the model , evaluation of parameters and test of the model are stated . At last, take Mianyang Sanjiang reservoir as example, it is testified that the total phosphorus prediction model of channel reservoir has rather good application and predictable accuracy. Then, using the total phosphorus prediction model of channel reservoir predict the variation of total phosphorus concentration of Sanjiang reservoir in 2006, and supply some approaches to improve eutrophication of Sanjiang reservoir.As a spearhead, A.B.Kapayms diffuse model is applied in narrow channel reservoir, and the form of solution is so simple that it can be calculated easily. Besides, programs about model prediction, evaluation of parameters, model test and disposal of figures are edited with MATLAB, so the total phosphorus prediction model of channel reservoir can be applied in better way.