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Authoritative PPT Summary
"River" China's natural environment PPT courseware 3
rivers and lakes
numerous rivers and lakes
Outflow rivers and outflow areas: distributed in the southeast monsoon area, belonging to three ocean basins and major rivers (lakes)
Differences between the north and south of the Wailiu River: the length of the ice period and flood season of the Qinling-Huaihe River in the north and south
Inland rivers (lakes), inland areas—distribution, characteristics (supply water sources), the longest inland river
Management of the Yellow River
Overview of the Yellow River: location, length, origin, ocean into which it flows, shape of main stream, division of upper, middle and lower reaches
The Dedication of the Mother River: Hydropower, Irrigation Distribution
Troubles of the Yellow River: land desertification, soil erosion, above-ground rivers, excessive floods, flow interruption and management
Development of the Yangtze River
Overview of the Yangtze River: status, length, origin, ocean into which it flows,
Division of important tributaries and lakes, upper, middle and lower reaches
Hydropower treasure house: distribution, development and utilization (Three Gorges, Gezhouba)
Golden Waterways: Distribution and Management
Yangtze River Floods: Causes and Treatment
basic concept
Outflow river: A river that ultimately flows into the ocean.
Inland river: A river that ultimately fails to reach the ocean.
inflow area, outflow area
The outflow area occupies about 2/3 of the land area, with more than 95% water volume and a large number of rivers.
The water in the outflow area mainly depends on precipitation.
The inner flow area accounts for about 1/3 of the land area, with less than 5% water volume and a small number of rivers.
The water in the inner flow area is mainly supplied by melting water from mountain ice and snow.
Development and management of the Yangtze River and Yellow River
Overview of the Yangtze River
The Yangtze River originates from the Tanggula Mountains and is the longest river in my country with a total length of 6,300 meters. Injected into the East China Sea. The boundary points between the upper, middle and lower reaches are Yichang and Hukou.
Management of the Yangtze River
Governance and protection: What ecological problems exist in various reaches of the Yangtze River? Are there any connections between them? How should the Yangtze River be managed and protected?
Overview of the Yellow River
Origin: Bayan Har Mountain, with a total length of 5,500 meters, the river with the largest sand content in the world.
The dividing points between the upper, middle and lower reaches: the mouth of the Inner Mongolia River, Taohua Valley in Henan, and empty into the Bohai Sea.
Main tributaries: Huangshui River, Fenhe River, Weihe River (largest)
"A river above ground"
Causes: Severe water and soil erosion in the middle reaches ("a bowl of water and half a bowl of sand"). The North China Plain in the lower reaches is flat, the water flow is slow, and sediment accumulates.
Summarize:
develop
Water energy development: Water energy is concentrated in the middle and upper reaches, hydropower stations: Xiaolangdi, Longyangxia
Diversion of the Yellow River for Irrigation: “Struggling to the south of the Yangtze River”
"Treasure House of Hydropower"——Hydropower Station
"Golden Waterway" - Port
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