What is the geological climate of Caijiatun, Shecun, Chuanshan Town, Huanjiang County, Hechi City?
Huanjiang Maonan Autonomous County in Hechi City is located on the slopes of the southern edge of the Central Guizhou Plateau. The general terrain is high in the north and low in the south. It is surrounded by rolling hills and hills in the south, with a slightly higher altitude of 1,693 meters. The lowest altitude is 149 meters. The mountains in the northeastern part of Huanjiang Maonan Autonomous County are part of the Jiuwan Mountains. The highest peak is Fenghuang Mountain, with an altitude of 1,693 meters; the northern mountains are dominated by Dagezhai (1,460 meters above sea level), which extends to the south to form the watershed of the large and small Huanjiang Rivers; the northwest The main peak of this mountainous area is Jin'ao Mountain (elevation 1061.4), which extends from northwest to south; the west and south are dominated by karst mountains, with earth mountains and half-earth and half-stone mountains in between. The peaks are towering and rugged. The highest peak is Mulun Township. Xiaodongpo has an altitude of 740.0 meters; the mountainous area in the south of the central part is the highest with Baxian Mountain, with an altitude of 731.9 meters.
The landforms within the county are controlled by lithology and geological structures. Carbonate rocks are widely distributed, mainly karst landforms, accounting for 39.9% of the county's total area. According to the basic form and origin of landforms, the county can be divided into three categories: structural erosion landforms, erosion and denudation landforms, and karst landforms. [8]
Climate
Huanjiang Maonan Autonomous County belongs to the subtropical monsoon climate zone, with a mild climate, abundant rainfall, sufficient sunshine, no severe cold in winter, no scorching heat in summer, and rain and heat in the same season. The frost-free period is long. The average annual temperature is 19.9°C in the southern Qiling area and 15.7°C in the northern mountainous area; the average temperature in January is 10.1°C and the average temperature in July is 28°C; the lowest temperature in the past years is -5.2°C, the frost-free period is 290, and the annual average The sunshine hours are 145.1 hours; the annual solar radiation is 98.89 kcal/cm².
The average annual rainfall is 1,750 mm in the north and 1,389.1 mm in the south, concentrated from April to September, accounting for 70% of the annual rainfall. The minimum rainfall over the years is 922.8 mm, and the evaporation is 1,571.1 mm. The average relative humidity is 79%.
Huanjiang is located in the north of Guangxi and at the southeastern foothills of the Yunnan-Guizhou Plateau. The general terrain is high in the north and low in the south, surrounded by mountains and hills, with hills in the middle and a slight basin. The county is located on the northern edge of the Tropic of Cancer and belongs to the monsoon climate zone transitioning from the south subtropical zone to the central subtropical zone. The southern edge zone belongs to the northern edge of the southern subtropical zone, while the central and southern parts and the large and small Huanjiang River Valley zones have a mid-subtropical valley climate. These two areas have a mild climate, abundant rainfall, sufficient sunshine, a long frost-free period, rain and heat in the same season, and crops can be harvested three times a year. The northern part has a mid-subtropical mountain climate, which is characterized by a warm and cool climate, humid and rainy weather, hot and rainy weather in the same season, and thermal conditions that allow for two crops a year. Due to the complex terrain and geographical location, disastrous weather in the county is more frequent, such as drought, floods, wind, hail and frost, which have a great impact on the county's industrial and agricultural production and people's lives.