{"id":15436,"date":"2023-10-22T18:00:15","date_gmt":"2023-10-22T17:00:15","guid":{"rendered":"https:\/\/www.aboutriver.com\/?p=15436"},"modified":"2023-10-22T18:00:15","modified_gmt":"2023-10-22T17:00:15","slug":"how-does-the-yangtze-river-change-downstream","status":"publish","type":"post","link":"https:\/\/www.aboutriver.com\/how-does-the-yangtze-river-change-downstream\/","title":{"rendered":"How Does The Yangtze River Change Downstream"},"content":{"rendered":"
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The Yangtze River – the longest river in Asia and the third-longest in the world – is a major source of water, food, electricity, and irrigation for many communities along its banks from the Tibetan Plateau to the East China Sea. It is an integral part of the country’s transportation system and serves an important role in the nation’s economy. As the Yangtze River flows eastward, its characteristics change in notable ways. <\/p>\n

The Yangtze River’s total length is approximately 6,380 kilometers, more than 200 kilometers longer than the Nile River in Egypt. Its source is in the west in Qinghai on the Tibetan Plateau, and the river descends in elevation as it flows eastwards. From the Tibet-Qinghai Plateau, the river flows through the provinces of Shaanxi, Sichuan, and Hubei and then passes through the cities of Chongqing, Wuhan, and Nanjing before flowing out into the East China Sea. From source to sea, the river’s elevation falls from a base of around 5,200 meters to zero at the sea. <\/p>\n

As the river flows, its physical characteristics change. For example, its water volume and sediment load increase. The sediment load increases from about 40 million tons at the headwaters to about 270 million at its lower stretches. A significant portion of this sediment is made up of rocks and boulders that have been eroded from the surrounding mountains by the river’s tremendous power, and it contributes to the formation of numerous shoals, rapids and islands along the course of the river. <\/p>\n

The Yangtze River’s ecosystem is also very different downstream. The downstream environment is much more heavily populated than the upstream environment, and the water quality changes accordingly. The increasing water pollution, which includes industrial and agricultural waste, has caused a decrease in oxygen levels, damaging the river’s aquatic habitat and adversely affecting species that live in the river. A decrease in biomass – the amount of living material in a given space – has been observed at various points along the river due to overfishing and other unsustainable practices. <\/p>\n