The average annual precipitation is 787.8- 1000mm, mostly concentrated in June-10, especially in rainy season, May-10, and heavy rains are mostly concentrated in June-August, with small-scale and high-intensity "single-point rainstorm" frequently occurring; The relative humidity is 75.3%,
Absolute humidity 13.6 mbar; The annual average evaporation is1801mm. 1-March is the first frost period, with occasional snowfall. Due to the complex terrain and large height difference, the rainfall in mountainous areas is generally higher than that in dam areas, and the temperature is lower. From the top of the mountain to the bottom of the valley, the temperature difference between day and night changes obviously throughout the year.
Extended data
The average elevation of Yuxi is about 1800. Yuxi is located in the western edge of Yunnan-Guizhou Plateau, with high terrain in the northwest and low terrain in the southeast. Ailao Mountain in Xinping County is the highest peak in Yuxi, with an altitude of 3 165.9 meters. The lowest altitude is Yuanjiang Valley, with an altitude of 328 meters. The terrain is complex, with the Red River as the boundary, and the landscape on the east and west sides is quite different.
To the west of the Red River is Hengduan Mountain in western Yunnan, and the mountain is northwest. The elevation of daxueguo mountain, the main peak of Ailao mountain, is 3 165.9m, the local minimum erosion datum level is 328m, and the relative height difference is 2838 m; East of the Red River is the Yunnan-Guizhou Plateau. Influenced by the zigzag structure of Yunnan Mountain,
The mountain trend is north-south, northwest-northeast and southeast, and the mountain is broken, with the main peak of Liangwangshan at an altitude of 2820m as the highest point, with a general altitude of1500-1900 m.
Yuxi has a developed water system, mainly belonging to the Pearl River and the Red River. Zongguo Mountain in the middle of Eshan is connected with Gaolu Mountain in the west of Hongta District, forming a watershed between the two major water systems.
Pearl River water system: it starts from Hongta District, Chengjiang, Jiangchuan, Tonghai, Huaning and Eshan in the east, and the Nanpanjiang section in the upper reaches of the Pearl River. It flows through Huaning County, China, with a length of 90km and a drainage area of 5,044km2. Its main first-class tributaries are Yangzong River, Haikou River, qinglong river and Qujiang from north to south.
Qujiang originates from Xiaoshiqiao in Hongta District, flows into Jiangchuan, Hongta, Eshan and Tonghai in the south, flows into Huaning County, and joins Nanpanjiang River at Sanjiangkou in Panxi, with a total length of 208km and a catchment area of 4103km2. Red River system: covering Xinping, Yimen, Yuanjiang and the west of Eshan, with a total length of 165km and a drainage area of 998 1km2.
Yuanjiang is the upper reaches of the Red River, which flows from north to south. It is called Gaza River and Mosha River when it enters the new year, Yuanjiang River when it enters Yuanjiang County, and Red River when it enters Vietnam. Its tributaries mainly include Lv Zhi River and Xiaohedi River, which are 180km long and 170km long respectively.
There are more than 30 major rivers in Yuxi City, with a drainage area of over 100 km ㎡, such as the main stream of Yuanjiang, Lv Zhi, Nanpanjiang and Qujiang. In addition to the tributaries of the Pearl River system, there are plateau fault lakes Bofu Xianhu, Xingyun Lake, Qilu Lake and Yangzonghai. Fuxian Lake covers an area of 212km2, and its water level is17,21m, with the deepest point reaching 155m and the average water depth of 87m.
It is the second largest deep-water lake in China with a total storage capacity of 654.38+085 billion m3. Xingyun Lake covers an area of 34.7 km ㎡, with an average water depth of 7m, a storage capacity of 65,438+89 million m3 and a normal water level of1.722.15m; Qilu Lake covers an area of 37.26 km ㎡, with an average water depth of 4.5m, storage capacity 1.68 million m3 and normal water level elevation1.797.25m.. Yangzonghai covers an area of 3 1k m2, with an average depth of 20m and a storage capacity of 602 million m3.
Baidu Encyclopedia-Yuxi