TakingthetransportoftotalphosphorpollutantsintheBeijingMiyunreservoirforexample,wehaveobtainedthreedimensionaldistributingregularityoftotalphosphorpollutantsbythecalculationofthelinearinterpolationvalueofeachpointbetweenhorizontallayers.Thecredibilityanalysisinallusiontothismethodwascarriedoutandtheprogrammingschemeforrealizingthismethodwassetforth.