The natural environment of Meile District

Meile District is located in a coastal and inland mountainous area, with a mid-subtropical monsoon climate and characteristics of both continental and oceanic climates. The general climate characteristics of the territory are: warm and humid climate, four distinct seasons, and abundant rainfall. In summer, the easterly wind makes it hot and rainy, while in winter, the northeasterly wind makes it cold and dry. The average annual rainfall in Meile District is 1656.3 mm. March to September is the rainy season, March to April is the pre-flood season, May to June is the main flood season, and October to February is the drier season. The annual average temperature is 19.4℃, the extreme maximum temperature is 41.4℃, which occurred in August 2003, and the extreme minimum temperature -5.8℃, which occurred in December 1991. The daily average temperature stably passes ≥10℃, the annual effective accumulated temperature is 3579.6℃, and the annual sunshine The number of hours is 1637.4 hours, the annual evaporation is 1592.3 mm, and the frost-free period is 305 days.

Due to the undulating terrain of Meile District, where mountains and river valleys intersect, the temperature distribution is complex. The urban area is the center, the high temperature area along the Shaxi River is formed, and the other mountainous areas are low temperature areas. The distribution of monthly average temperature is generally consistent with the distribution of annual average temperature. The annual average temperature in Meilie District changes relatively steadily from season to season, with the annual average temperature being 19.4℃, the annual average maximum temperature being 20.4℃, and the annual average minimum temperature being 18.5℃. It can be seen that the annual temperature change anomaly is within ±1.0°C, and the monthly average temperature changes greatly throughout the year. July is the hottest, with an average temperature of 28.2°C, and the highest average temperature in July is 29.8°C; January is the coldest, The average temperature in January is 9.7℃, and the average minimum temperature in January is 6.5℃. The daily temperature changes, with a peak and a valley pattern. The daily maximum temperature generally occurs at 13-14 o'clock in the afternoon, and the daily minimum temperature occurs at 5-7 o'clock in the morning. However, it varies slightly in each month due to different weather conditions such as clouds and fog. difference. The daily temperature difference is the difference between the highest temperature and the lowest temperature in a day. The summer half of the year is greater than the winter half of the year, with the largest temperature in July, reaching 11.1℃.

The annual average precipitation in Meilie District is 1,656.3 mm. The distribution characteristics of precipitation in Meilie District are: less precipitation along the Shaxi River and in the river valleys, and more precipitation in the mountains.

The number of sunshine hours available in Meilie District throughout the year is 4423.2 hours, and in leap years it is 4434.5 hours. The average annual actual sunshine hours is 1637.4 hours, accounting for 37% of the available sunshine hours. The maximum actual sunshine hours per year is 2081.5 hours, accounting for 47% of the annual available sunshine hours, while the minimum actual sunshine hours is only 1298.9 hours. It only accounts for 29% of the available hours.

Meile District is rich in resources. It is located in the mid-subtropical zone. The mountainous areas are mainly low mountains and hills, with an altitude of mostly between 150 and 500 meters. River valleys and streams are scattered alternately, and it is surrounded by towering mountains. Meile District Basin. The mild climate and abundant rainfall all year round provide extremely favorable conditions for trees and other organisms. The district has 300,000 acres of timber forests with a timber storage volume of 3 million cubic meters; and 150,000 acres of bamboo forests. It is one of the 17 key moso bamboo bases in the country. The underground mineral resources are rich, including 19 kinds of minerals such as iron, aluminum, zinc, sulfur, manganese, coal, limestone, kaolin and abundant natural mineral water resources.