Based on located research of tropical mountain rainforest watershed at Jianfengling of China,it was analyzed that the influence of canopy upon storm and heavy storm.Nutrients' Input output by storm and storm runoff were studied in the system for three years.The decreased potential energy of heavy rain,storm and heavy storm by canopy was occupied 61 8%～71 8% of the annual total of precipitation during three years,of which the heavy rain,storm and heavy storm amounted to 21 6%,9 8%,68 6%,respectively.Me...