Who can tell me what the natural environment in Northeast China is like?

The largest plain in China. Also known as Songliao Plain. Located in the northeast of China. It is more than 0/000 kilometers long from north to south and 300-400 kilometers wide from east to west, with a total area of about 350,000 square kilometers. The eastern and western sides of the plain are Changbai Mountain and Daxing 'anling, the northern part is Xiaoxing 'anling, and the southern end is near Liaodong Bay.

The northeast plain is centered on the Liaohe River in the southwest, which is an aeolian landform with alternating dunes and depressions and microwave fluctuation. The terrain is high in the west and low in the east, with an altitude of 170 ~ 250 meters. Sand dunes from west to east, from southwest to northeast, mainly mobile sand dunes gradually transition to semi-fixed and fixed sand dunes; The degree of desertification has also declined in the same direction. Sand dunes are mainly formed by in-situ sand lifting. Unreasonable development and utilization is the main reason for the formation of sand dunes and sandy land.

Northeast plain is located in temperate zone and warm zone, and has continental and monsoon climate characteristics. Summer is short, warm and rainy; Winter is long and cold, and there is almost no snow. Monsoon alternates between winter and summer. The average temperature in July is 2 1 ~ 26℃, 1-24 ~-9℃. The active accumulated temperature above 10℃ is 2200 ~ 3600℃, which decreases from south to north. The annual precipitation is 350 ~ 700 mm, decreasing from southeast to northwest. autumn

85 ~ 90% of the water is concentrated in the warm season (May ~1October), and the rainfall peaks in July, August and September. The annual precipitation changes little, about 20%. The dryness increases from southeast to northwest. Generally, crops in the north can grow well, cotton and winter wheat can also be planted in the south of Liaohe Plain, while sorghum in the north of Songnen Plain is difficult to grow. Low temperature in spring and frequent frost in autumn. In flood season, there are often floods on both sides of rivers and depressions.

The Northeast Plain is fertile and rich in resources. It is an important production base of grain, soybean and animal husbandry in China, as well as a base of steel, machinery, energy and chemical industry.