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南阳盆地位于豫西南,北靠伏牛山,东南属桐柏山,东部和东北部为大别山余脉,西南为秦岭余脉,三面环山,中部向南开口形成“南衮盆地”,盆地边缘丘陵起伏,中央为平原,境内有唐河、白河、湍河及丹江等水系。按全国干旱、半干旱、半湿润或湿润地区界线划分标准衡量,年降雨量(不论日平均气温≥0℃或≥10℃期间的降雨量)650毫米以上,属湿润区;干燥度(不论年或季)为1.00,则属亚湿润区。据统计全区日
The Nanyang Basin is located in the southwest of Henan Province, south to the Funiu Mountain to the north, Tongbai Mountain to the southeast to the east, northeastern part of the Dabie Mountains, and to the southwest to the Qinling Mountains. It is surrounded by mountains on three sides and southwards to the south to form the Nanxun Basin. , The central plains, the territory of the Tanghe, Baihe, Turbu and Danjiang and other water systems. According to the national standard for dividing the boundaries of arid, semi-arid, sub-humid or humid areas, annual rainfall (no matter the average daily temperature ≥0 ℃ or rainfall ≥10 ℃) is more than 650mm, which belongs to the humid zone; the dryness Or season) is 1.00, is a sub-humid zone. According to statistics area day