Research On Methods Of PMF With Thaw Military Supplies Calculationin In Western Of Tianshan Mountains

Regarding by methods of PMF with the rainstorm and the snowmelt mix military supplies calculation, in the standard had not possibly proposed the concrete computational method as well as the experience summarizes, this is the Xinjiang this kind of mix military supplies primarily type rivers design flood computation difficulty. To probable maximum flood estimate of rainstorm snowmelt flood estimate, not only includes the most cloud burst the estimate also to have under the most cloud burst condition to melt the snowfall the estimate. The snowmelt flood most dangerous situation is: The cloud burst flood and the strong thaw flood mutually superimpose the flood which forms.The paper in view of the Xinjiang rainstorm thaw flood characteristic, to includes the thaw military supplies probable maximum flood computational method to carry on the discussion and the analysis. Mechanism occurs which based on the mix military supplies rivers flood, take Tianshan west the mountainous area card sea as the example, chooses the material comparatively to be good in 2005 is the typical year. First calculates PMP by the local rainstorm enlargement law and the rainstorm transpose law, and its time interval assignment and spatial distribution.Then, the basis actual temperature record is enormous the temperature process, and analysis spatial distribution; Again will accumulate the snow depth according to the remote sensing information to be enormous; Finally front will state the hydrology process input to contain the snowmelt structure the Xin′anjiang Model, the output flood process namely asks PMF.In calculates in the PMF process, this article analyzes has probable maximum flood combination way, the analysis thaw flood most dangerous situation, determined PMP occurs the position, then carries on enormous processing to the temperature, causes PMP and the strong thaw superimposes, carries on using the thaw Xin′anjiang Model produces the afflux computation, obtains PMF, and has carried on the rational analysis to the PMF achievement. The author thought this article discusses contains the thaw military supplies possibly the biggest flood method is basic reasonable, may provide the reference for possibly the most cloud burst thaw flood computation.