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本刊1984年第2期李延福、陈金平两位同志所写的《对森林增加降雨量的初步认识》一文提到:河南省济源县以虎岭为界,北部和西北部林木茂密,西南和东南部是童山秃岭,间有零星的人工刺槐林。林区有四个雨量观测站,非林区有八个雨量观测站。从这些站26年(1956—1981)的降水量比较来看,林区年平均降水量825.7毫米,非林区660.6毫米,前者比后者高25％。同时,虎岭河小流域中,在森林覆盖率为95.7％的赵沟和仅有少量灌木丛、覆盖度为10.3％的小北沟
In my article, No. 2, 1984, Li Yanfu and Chen Jinping mentioned in his article “A Preliminary Understanding of Increasing Rainfall in Forests.” In his article, Jiyuan County, Henan Province, is dominated by the Tiger Ridge, with dense forests in the north and northwest, Southeast Tongling Bald Ridge, there are sporadic artificial Robinia. There are four rainfall observatories in the forest area and eight rainfall observatories in the non-forest area. From the comparison of precipitation in these stations for 26 years (1956-1981), the average annual precipitation in the forest area is 825.7 millimeters, 660.6 millimeters in non-forest area, the former is 25% higher than the latter. At the same time, in the small watershed of the Tiger Ridge, Zhao-ditch with a forest coverage of 95.7% and a small amount of shrubs with a coverage of 10.3%