What are the characteristics of Tarim River?

The water of Tarim River is mainly supplied by the precipitation in the upper reaches of the mountain and the melting water of snow and ice on the mountain. From Aksu estuary to Qunkeer in the south of Yuli county, the floodplain is vast, meandering is developed, and there are many river branches. During the flood period, there is no fixed river course, the flood is widespread, the water flow is scattered, and the river is easy to change course. Valley depressions are easy to form lakes and swamps. The river below Qunkel flows into another tributary. Historically, the Tarim River swung from north to south, and there were no definite immigrants. The last time in 192 1, the mainstream flows eastward into Peacock River and flows into Lop Nur. 1952, a dam was built near Yuli County, across the Peacock River, and the river flowed to taitema lake via Tieganrik. There are large-scale water conservancy facilities in the middle and upper reaches of Tarim River, and 197 1 has Tarim sluice. Many farms have been built along the coast.

The flow of Tarim River varies greatly due to seasonal differences. In the hot summer, the ice and snow melt, and the river flow increases sharply, just like a "wild horse without borders" roaring through the deserts and grasslands of Wan Li. There is an 80-hole concrete bridge on the Tahe River, with a total length of 1600 meters. Many water conservancy facilities have been built in the Tahe River Basin. The hard work of the people of all ethnic groups has turned the desert into a mulberry garden, and the fruits and vegetables on both sides of the Tahe River are full of flowers and fragrance.

The main stream of Tarim River is divided into upper, middle and lower sections: the upper section is above Yangjibazha, and the riverbed is not bifurcated, with strong erosion, twists and turns and instability; Yangjibazha to Qunke is the middle section, where there are many tributaries and lakes and marshes. During the flood period, the water overflows and disperses, and the main stream is often diverted. The lower section is below the group family, and the river channel is unified. After leakage, evaporation and irrigation in the upper and middle sections, there is little left. Moreover, due to the construction of Daxihai Reservoir between Qunke and Tieqianlike, only a small amount of river water can flow to Britain and the Soviet Union, and only water can be discharged into taitema lake during the flood period.

Tarim river basin is located in the hinterland of Eurasia, far away from the ocean and surrounded by mountains, and belongs to the continental warm temperate zone and extremely arid desert climate. It is characterized by scarce precipitation, strong evaporation, large temperature difference, windy and dusty weather, long sunshine time and abundant light and heat resources. The annual average daily range of temperature is 14℃ ~ 16℃, and the annual maximum daily range is generally above 30℃. The annual average temperature is between 10.6℃ and 1 1.5℃. It's cool in summer and cold in winter. The average temperature in summer and July is 20℃ ~ 30℃, and the extreme maximum temperature is 43.6℃. In winter, the monthly average temperature of 65438+ 10 is-/kloc-0℃ ~-20℃, the extreme minimum temperature is -30.9℃, and the accumulated temperature greater than or equal to 10℃ is mostly between 4000℃ and 4500℃ for180. Annual average precipitation 17.4 ~ 42.8 mm, evaporation1125 ~1600 mm (converted by E-60 1 evaporating dish). The drought index gradually increases from north to south and from west to east, with the range of 17 ~ 50. There are many sandstorms and floating dust in the mainstream area, and the downstream area is the most serious. The annual frequency of sand blowing wind (greater than or equal to 5 m/s) is 202 days, the maximum wind speed is 40 m/s, and the dominant wind direction is northeast to northeast wind.