What is the main terrain of our hometown (Zhejiang)? What impact will it have on production and life?

Our hometown (Zhejiang) has complex terrain, with mountains and hills accounting for 70.4%, plains and basins accounting for 23.2%, rivers and lakes accounting for 6.4%, and the cultivated land area is only 2.0817 million hectares, so it has "Seven Mountains and One Land". "Water divides farmland into two parts".

Zhejiang has a subtropical monsoon climate, with moderate temperatures, distinct four seasons, sufficient sunshine and abundant rainfall. The province's multi-year average total water resources is 93.7 billion cubic meters, ranking fourth in the country in terms of unit area. However, the per capita water resources are only 2,004 cubic meters, which is lower than the national per capita level.

The general characteristics of Zhejiang’s climate are: significant monsoons, four distinct seasons, moderate annual temperatures, more sunlight, abundant rainfall, humid air, synchronous seasonal changes in rain and heat, diverse climate resource configurations, and numerous meteorological disasters. The annual average temperature in Zhejiang is 15~18℃, the extreme maximum temperature is 33~43℃, and the extreme minimum temperature is -2.2~-17.4℃; the province's average annual rainfall is 980~2000 mm, and the annual average sunshine hours are 1710~2100 hours.

In spring, the East Asian monsoon is in the alternating season between winter monsoon and summer monsoon, with frequent intersections of north-south airflow and intensified low pressure and frontal activities. The climate in Zhejiang in spring is characterized by cold and rainy weather. Strong winds often occur along the coast and offshore areas. Rainfall increases throughout the province, and the weather is unpredictable. As the saying goes, "The face of a child in spring changes three times in one day." The average spring temperature in Zhejiang is 13~18℃, and the temperature distribution is characterized by decreasing from inland areas to coastal and island areas; the province's precipitation is 320~700 mm, and the precipitation distribution is gradually decreasing from the southwest to the northeastern coastal areas; the province's rainfall is Days range from 41 to 62 days. The main meteorological disasters in spring include heavy rain, hail, strong winds, late spring cold, etc.

In summer, with the establishment of the summer monsoon circulation system, southeasterly winds prevail in Zhejiang. The subtropical high pressure activity in the northwest Pacific has an important impact on the weather in Zhejiang, while the cold air from the north and south still has a certain impact on the weather in Zhejiang. In early summer, various parts of Zhejiang gradually enter the flood season, commonly known as the "Meiyu" season. The probability of heavy rains and heavy rains increases, which can easily cause floods. In midsummer, affected by the subtropical high pressure, Zhejiang is prone to sunny, hot and dry weather, causing droughts. Summer is affected by tropical storms. The period with the highest probability in Zhejiang. Zhejiang's summer climate is characterized by high temperatures, heavy precipitation, strong sunlight, humid air, and frequent meteorological disasters. The average summer temperature in the province is 24 to 28°C, and the temperature distribution is characterized by decreasing from the central area to the surrounding areas; precipitation in various places is 290 to 750 mm, with more precipitation in the eastern mountainous areas, such as Kuocang Mountain, Yandang Mountain, Siming Mountain, etc., islands and central areas There is relatively little precipitation in the region; there are 32 to 55 rainy days in various parts of the province. The main meteorological disasters in summer include typhoons, heavy rains, droughts, high temperatures, thunderstorms, strong winds, tornadoes, etc.

In autumn, the summer monsoon gradually weakens and transitions to the winter monsoon. Cyclone activity is frequent, there is more frontal precipitation, and the temperature changes greatly. Zhejiang’s autumn climate characteristics: In early autumn, Zhejiang is prone to drizzling rainy weather, commonly known as “Autumn Lazarus”; in mid-autumn, controlled by high-pressure weather systems, Zhejiang is prone to clear autumn weather with clear skies and clear winds, which is the so-called “Autumn Lazarus”. The weather of October is "Indian Spring"; in late autumn, the influence of cold air from the north begins to increase. The weather changes between cold and warm, sunny and rainy frequently, and the temperature fluctuates greatly. The average autumn temperature in the province is 16 to 21°C, with the southeastern coastal and central areas having higher temperatures and the northwest mountainous areas with lower temperatures. The precipitation ranges from 210 to 430 mm. The coastal mountainous areas in the central and southern areas receive more precipitation. It is slightly less, but its inter-annual variation is large; there are 28 to 42 rainy days in various parts of the province. The main meteorological disasters in autumn include typhoons, heavy rains, low temperatures, rainy weather, heavy fog, etc.

In winter, the strength of the East Asian winter monsoon mainly depends on the activity of the Mongolian cold high pressure. The weather in Zhejiang is subject to the influence of the northern cold air mass (i.e., the winter monsoon), and there are relatively few types of weather processes. Zhejiang's winter climate is characterized by sunny, cold, less rain, and dry air. The average winter temperature in the province is 3 to 9 degrees Celsius, and the temperature distribution characteristic is that it decreases from south to north and from east to west. The precipitation in various places is 140 to 250 mm. Except for the islands in the northeast, there is little difference in other places. There are 28 to 41 rainy days in various parts of the province. The main meteorological disasters in winter include cold waves, freezing damage, strong winds, heavy snow, heavy fog, etc.