本文根据吉林省东部长白山区的地貌特点和火气气候特征,采用长序列雨量资料,分析了年雨量和5一9月雨量在各主要山脉(山休)不同坡地方位上的分布特征,获得了不同坡向的相对雨量分布系数,建立了和对雨危系数随坡向角而变化的数学模型,

According to the topographic and climatic characteristics and long-sequence precipitation data of the Changbai Mountain,the distributive charcteristics of coefficients of relative precipitationin in different slope directions of the main ridges in a year and from May to September are analyzed,and the relation functions between relative precipitation and slope direction angles are established.The order of precipitation in different slope directionsins on various ridges is SW & gt;S & gt;W & gt;N & gt;E & gt;NE,their corresponding relative Precipitation coefficients are 1.083,1.071,1.060,0.917,0.913,0.912 in a year,and 1.071, 1.059,1.050,0.933,0.933,0.922 from May to September.The precipitation is highest in windward slopes and lowest in leeward slopes,and the former is 20.5%more than the latter.The effect of slope is great in the Panling, Weihuling Yingerling ridges and Dunhua basin.The effect of slope on precipitation depends on the interception of slope to air current.