汝阳县地处豫西伏牛山区,总面积1325平方公里,91％属于淮河流域。境内地势大致是“七山、二岭、一分川”。多年平均降水量为671毫米,最高年降水1125.6毫米,最少年降水383.4毫米,60％以上集中在7、8、9月,在时空上分布极不均匀。从自然灾害方面看,旱灾的威胁最为严重。 Ruyang County is located in the western Henan Funiu Mountain, with a total area of ​​1325 square kilometers, 91% belong to the Huaihe River. Territory generally is “seven mountains, two Ridges, a sub-Chuan.” The average annual precipitation is 671 millimeters, the highest annual rainfall of 1125.6 millimeters, the least annual precipitation of 383.4 millimeters, more than 60% concentrated in July, August and September, very uneven distribution in time and space. In terms of natural disasters, the threat of drought is the most serious.