Geography Of The Yellow River

According to China Research and Exploration Society, the source of the Yellow River is at 34 29 31.1N, 96 20 24.6E near the eastern edge of the Tibetan Autonomous Prefecture of Yushu. Source to sink tribituaries Gyaring Ngoring Lake and Lake on the western edge of Golog Prefecture high in the mountains in a Bayan Qinghai Province in the far west of China. In Zoige basin along the border of Gansu Province, the loops of the Yellow River to the northwest then northeast before turning south, creating "Ordos Loop", and then flows generally eastward into the northern China to the Bohai Bay, draining a basin of 752443 km sq (290,520 sq miles), which feeds 140 million people with drinking water and irrigation.
The river is usually divided into three phases. It is essentially the northern Tibetan Plateau, the Ordos loop and the North China Plain. However, different experts have different opinions on how the three phases are divided.This article follows the division used by the Yellow River Conservancy Commission.

Upper Raches


The upper Yellow River, is a segment from its source to Bayan has mountains and ends at Hekou County of Inner Mongolia just before it turns sharply to the north. This segment has a total length of 3472 km (2157 mi) and total pool of 386000 km sq (149,000 sq mi), 51.4% of the total area of ​​the basin. Along this length, drops the height of the Yellow River 3496 meters, with an average grade of 0.01%.
The section of the fountain flows mainly through the grasslands, swamps and mountains, the mountains of Bayan Har (巴 颜 喀啦 山脉) and Anemaqen (Amne Machin) Mountains. The river is clear and consistent flow. Clear lakes are characteristic of this section. The two main lakes along this section of the lake Zhaling (扎陵湖) and Lake Eling (鄂陵湖), with a capacity of 4.7 billion and 10.8 billion cubic meters (166 and 381 000 000 000 ft3), respectively. At an altitude of 4290 meters over (14,070 ft)) above the sea, are the two largest freshwater lakes in China plateau. A significant amount of land in the area of ​​origin of the Yellow River has been designated as the Sanjiangyuan ("Three Rivers" Sources ") of the National Nature Reserve to protect the source region of Yellow River, the Yangtze and Mekong.
The section extends from the throat Longyang Gorge in Qinghai Qingtong valley in Gansu. Line of cliffs on both sides of river. The water bed is narrow and the average decline is large, so that the flow in this section is very turbulent and fast. There are 20 guns in this section, the most famous of them. As the Longyang, Jishi, Liujia, Qingtong Bapan and gorges flow conditions in this section is the best location for hydroelectric plants.
After leaving the Qingtong creek, the river enters a broad alluvial plain section of the Yinchuan Plain and the plain Hetao. In this section, the regions along the river are mostly deserts and grasslands, with few tributaries. The flow is slow. Hetao the plain has a length of 900 km (560 miles) wide and 30 to 50 km (20-30 miles). It is the story of the plain of the largest irrigation along the Yellow River.

Middle Reaches
Part of the Yellow River (see Ordos Loop) between Hekou County, Inner Mongolia, Inner Mongolia and Henan Zhengzhou form in the middle of the river can be reached. Reaching half of 1206 km (749 miles) long, the pool area of ​​344 000 square kilometers (133,000 km ²), 45.7% of the total, a total profit falls to 890 meters (2920 feet), the decrease average of 0074%. There are 30 major tributaries along the middle course, and the flow of water has increased from 43.5% in this scene. Intermediate River, contributes 92% of silt.
In the middle of the power of the Yellow River passes through Loess Plateau, where erosion occurs significantly. A large amount of mud and sand discharged into the river makes the Yellow River the most sediment load of rivers in the world. The highest annual level of silt the Yellow River is discharged 3910000000 tonnes in 1933. The highest concentration of sludge was recorded in 1977 to 920 kg / m³ (57.4 lb/ft3). These later sediments of the river downstream of the deposit below the elevation of the river bottom, creating the 'above the famous river. "
From Yumenkou Hekou County, the river crosses the longest continuous series of valleys, the main course, collectively known as Jinshan Valley. A hydrodynamic rich resources stored in this section makes the second best area to build hydroelectric power plants. Hukou famous waterfall is less a part of this valley.

Lower Reaches

In the lower ranks of Zhengzhou to the sea at a distance of 786 km (488 mi), the river is limited to a dyke lined course as it flows north on the North China Plain before emptying into the Bohai Sea. The pool in this phase is only 23,000 square kilometers (8,900 square miles), only 3% of the total, with only a few tributaries add to the traffic in this phase, almost all rivers in the south to flow into the Huai River, while running north into the Hai River. The overall decrease in the increase of depression is 93.6 meters (307 feet), with an average grade of 0.012%.
Limo received sediments from the middle here, raising the riverbed. For 2,000 years the construction of dams, excessive deposits of sediment have raised the riverbed several meters above the surrounding soil.
In Kaifeng, the Yellow River is 10 meters (33 feet) above ground level.

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