Temporal and Spatial Distribution Characteristics of Water Resources in the Air in Heilongjiang Province

The integrated stratus of atmospheric precipitation and the temporal and spatial distribution of natural precipitation efficiency were analyzed using the daily meteorological data collected by 80 meteorological stations from 1960 to 2007 in Heilongjiang Province.Distribution of atmospheric precipitation which decreased from south to north had a large regional difference in Heilongjiang Province.Distribution of natural precipitation also had a large regional difference.The average annual precipitation efficiency was relatively higher in the northern Daxinganling,Xiaoxing'an and its southern area but relatively less in the south of Daqing,Qiqihar and Suihua.The atmospheric precipitation fluctuated irregularly without large annual variations.The atmospheric precipitation concentrated in summer and fall and accounted for 78.2% of annual precipitation.The monthly atmospheric precipitation showed a single peak structure,and the annual integrated stratus of atmospheric precipitation was concentrated from May to October accounting for 84.2% to annual precipitation.