Traditional Culture Encyclopedia - Weather forecast - Distribution of rivers in Yulin City, Shaanxi Province

Distribution of rivers in Yulin City, Shaanxi Province

what's up Just the city or? Yulin area? River map?

Pictures are not easy to find. This photo was found in the newspaper.

This kind of map may generally be found in books, such as our Yulin county (city) records or detailed introduction. ?

What I know is mainly the Wuding River?

6. Wuding River?

Wuding River is a sandy tributary on the right bank of the middle reaches of the Yellow River. Originated in Dingbian County at the foot of the northern mountain in Shaanxi Province, it flows through Uxin Banner in Yikezhaomeng, Inner Mongolia, flows to the northeast, then turns to Yuhebao to the east, then turns to the southeast, and flows into the Yellow River in Hekou Village, Qingjian County, Shaanxi Province, with a total length of 49 1 km and a drainage area of 3026 1 km2. According to the measured data of Kawaguchi Hydrological Station 1957 ~ 1967, the average annual runoff15.35 million cubic meters, annual sediment transport 21700,000 tons, and average sediment concentration 14 1 kg/cubic meter. ?

Wuding River Basin is located in the northern part of the Loess Plateau and the edge of the Mu Us Desert, which has both geomorphological features. According to the landform and soil erosion characteristics, the basin can be divided into three types: one is the sandstorm area, which is located in the northwest of the basin and covers an area of l6446 square kilometers, accounting for 54.3% of the basin area. The ground is covered with Quaternary loose sand and sandy loess, and the landform includes mobile, semi-fixed and fixed sand dunes and beaches, with slight water erosion and serious wind erosion. 2. The area between beams at the source of the river is located in the southwest of the basin, with an area of 3,454 square kilometers, accounting for 1 1.4% of the basin area. Gully erosion is particularly serious, and the annual erosion accounts for 2 1.4% of the annual sediment transport in the basin. 3. The whole loess hilly and gully region is located in the middle and lower reaches of the basin, with an area of 1036 1 km2, accounting for 34.396% of the basin area. The annual erosion accounts for 72.6% of the annual sediment transport in the basin, which is the main source area of sediment in the basin, and the erosion modulus is as high as 1770 tons/km2. ?

Over the years, the Wuding River has been listed as the focus of soil and water conservation management, and the comprehensive management has achieved remarkable results. Among them, Yulin area has made great achievements in sand control, and a large number of sand dams and reservoirs have been built on tributaries of the basin, especially a series of water storage and mud dams in the upper reaches of Wuding River, which have effectively stopped sand. Through comprehensive management, the watersheds have changed. According to the measured data of Chuankou Hydrological Station, the average runoff of 197 1~ 1980 decreased by 25.3%, and the annual sediment discharge decreased by 62. ? 4% (including the impact of light rainfall). In recent years, huge natural gas resources have been discovered and developed in this basin. 1997, the natural gas in wuding river basin was transported to the capital Beijing by pipeline. ?

I'll send you the picture by the way.