The geographical environment of Jang Jin

Jang Jin is the east gate of Beijing, located in the northeast of Shunyi District, 60 kilometers away from Beijing, 30 kilometers away from the Capital Airport and 25 kilometers away from Shunyi District. Located at the intersection of Pinggu, Tianjin and Hebei. Pinggu District in the east, Yangzhen Town in the west, Longwantun Town in the north and Dasungezhuang Town in the south.

Jang Jin Town is about 10.4 km long from north to south and about 6. 1 km wide from east to west, with a total area of 54 square kilometers. There are mountains and flood plains in Jang Jin, but 83% of them are fertile light loam and loam. Soil organic matter 1.0- 1.2%, nitrogen content 0. 1-0. 15%, alkali-hydrolyzable nitrogen 1 10ppm, available phosphorus1. The water source conditions in this area are good, and the groundwater is abundant, mostly rock wells.

The average annual water level in 2002 was 17. 14m/42.438+0m. Crops suitable for planting: winter wheat, corn, soybean, sweet potato, peanut, pasture, fruit trees, vegetables, watermelon and some varieties of Chinese herbal medicines. Jang Jin region belongs to continental climate, which is characterized by dry and windy spring, hot and rainy summer, short days in autumn, cold and dry winter, uneven distribution of annual rainfall, and the rainfall in spring (March-May) is generally around 60 mm; In summer (June-August), the rainfall is about 430 mm, accounting for 75% of the annual rainfall, and heavy rain or heavy rain often occurs in July-August; In autumn (9-65438+1October), the precipitation is insufficient 100 mm, and in winter (65438+2-February), it is only about11mm. Rainstorm, rainstorm, gale and hail are the main disastrous weather in Jang Jin.

The average annual temperature in this town is 1 1.6℃, the average summer temperature is 24.8℃, and the average winter temperature is -3℃ ... The average annual precipitation is 695.4 mm, the maximum annual precipitation is 1406 mm, the minimum annual precipitation is 333 mm, and the average frost period for 30 years is1. The annual sunshine is about 2793.7 hours, and the annual accumulated temperature is 4143℃ (above10℃). There are Wuming River in the town east and Jinji River in the west, both of which are Ji Canal system. The average depth of groundwater in plain area is about 22 meters, and that in piedmont area is 35 meters.