What is the average altitude of Junlian, Sichuan?

The terrain of Junlian County is high in the south and low in the north. The summit of the Daxue Mountain in the southeast is the highest, with an altitude of 1,777.2 meters. The Mutan Valley in the northeast is the lowest, with an altitude of 368.5 meters, and a range of 1,408.7 meters. Karst landforms are developed in the area, and karst and The geological structure has a profound impact on the Junlian landform, forming a strange and colorful low-mountain canyon landform.

Low-mountain trough dam

Low-mountain karst trough dam, 420-600 meters above sea level , covering an area of ??approximately 114,300 acres, accounting for 6.07% of the county’s total area. It includes Junlian Town, Xunsi Town, Tengda Town, Shuangteng Town, Tangba Township, Muai Town, Leyi Township, Zhenzhou Town, and Luomuru Town There are more than 10 dams along both sides of the river in towns and villages. The peaks on both sides of the dam are tall and straight, and the valleys are wide and flat, ranging from hundreds of meters to several kilometers in length. The surface is mostly slope accumulation and alluvial deposits.

Shallow cut Low Mountain

The altitude is 380-900 meters, covering an area of ??648,000 acres, accounting for 34.39% of the county’s area. It includes Junlian Town, Tengda Town, Xunsi Town, Wude Township, Shuangteng Town, and Tangba Part of the 105 villages within the township, Muai Town, Weixin Town, Luomuru Town and other towns. The hills are shaped like steamed buns, with gentle slopes and small dissolution basins in between. The land is large and flat, and the surface is mostly residual material. Developed mountainous yellow soil.

Zhongqie Low Mountain

The altitude is 500-1000 meters, covering an area of ??301,000 acres, accounting for 15.96% of the county’s total area. Including Junlian Town, Xunlian Town, Parts of 48 villages in Si Town, Dalue Township, Tangba Township, Leyi Township, Zhenzhou Town and other townships. It is mainly made of purple sandstone and shale of the Feixianguan Formation. The mountains are continuous, the ground is undulating, and the slopes are steep. It is steep and the surface is mostly residual material.

Zhongshan Deep Valley

The altitude is 900-1777.2 meters, covering an area of ??820,000 acres, accounting for 43.55% of the county's area. Most of them are in the southern part of the county. Including all or part of 56 villages in Haoba Town, Longzhen Township, Gaoping Township, Lianhe Township, Jiefang Township, Gaokan Township, Tuanlin Township and other townships. The valleys are narrow and deep, the valley slopes are steep, and the ground is broken. The surface is mostly mountainous yellow soil developed from the remnants of Paleozoic mudstone sandstone.

Junlian County is located in southern Sichuan and belongs to the mid-subtropical monsoon climate zone of the Sichuan Basin. Its main climate characteristics are: warm climate and abundant precipitation. , four distinct seasons, warm winters and early springs, long summers and short autumns, with less frost and snow. The weather changes drastically in spring, with droughts in early summer, floods in midsummer, continuous rains in autumn, and little sunshine in winter. The regional climate differences are significant. The temperature in the county ranges from northeast to northeast. The southwest decreases as the altitude increases. For every 100 meters of altitude increase, the temperature drops slightly by 0.65°C. The rainfall gradually increases from north to south, from low to high. In Yuanping County, which is 940 meters above sea level, it is located on the windward side. Due to special The uplift of the terrain forms the rainfall center of our county, and the average annual precipitation can reach more than 2,000 mm. The relative humidity increases with the altitude. For every 100 meters of altitude increase, the annual average relative humidity increases slightly by 1%. The sunshine varies with the terrain. Changes: the top of the mountain gets more sunshine than the foot of the mountain, and the dam area gets more sunshine than the mountainous area.

According to statistics from the County Meteorological Bureau, the annual average temperature in Junlian County is 17.5℃, the extreme maximum temperature is 40.0℃, and the extreme minimum temperature is -2.3 ℃. The multi-year average annual rainfall is 1113.6 mm, and the maximum daily rainfall is 171.6 mm. The multi-year average annual sunshine is 1052.9 hours. The frequency of summer drought is 57%. Among them, it occurred from April 2 to June 27 in 1994. A severe summer drought of 75 days. The frequency of latent drought is 11%. The total accumulated temperature greater than 0℃, the multi-year average is 6413.9℃.