采用不规则9边形作为东北地区模拟边界,计算该区上空1981～1986年平均水汽年总输入量为+60622.70亿m3,年总输出量为-60604.43亿m3,净输送量为一正值,构成该区主讯期的水量是来自外境水汽成云致雨而成;该区的枯水期则是上空水汽外流耗散时期.还探讨该区水汽输入的主边界、输出主边界及水汽主源地.
Based on an irregular polygon simulating the natural border of northeast China,the amounts of water vapour transpoting for the period 1981-1986 have been computed.It shows that:mean annual water vapour importing and exporting are 60 622.70?108m3 and 60 604.43?108m3,respectively, and the net transporting 18.27?108m3 is a positive.In the whole year, only in Summer, the net importing of water vapour of this region is a positive (+3373.15?108m3).The runoff value in the main flood season for this region is precipitation which are caused by the water vapour impoiting from the outaide surrounding rveas.While the dry season is the dissipating period of water vapour.In this paper, the main importing and exporting boundaries as well as source areas of water vapour are also given.
