"Yellow River" PPT

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"Yellow River" PPT

Part I: The origin of the Yellow River and the ocean it flows into

The Yellow River flows through 9 provinces and autonomous regions, with a total length of 5,464 kilometers. It is the second longest river in my country.

The division of the upper, middle and lower reaches of the Yellow River

Source: The river is not deep and the water flow is gentle and clear.

Below Longyang Gorge: the water is fast and turbulent

After entering the Ningxia Plain: the water flow is gentle

Midstream: The sediment content increases greatly and there are many tributaries

Downstream: the water flow is gentle, the river channel becomes wider, and sediment is deposited in the river bed, becoming an "above ground river"

Yellow River PPT, part 2: Management and development of the Yellow River

specific measure

Upstream: cascade development of water energy, construction of large-scale water conservancy project; planting trees and grass

Midstream: vigorously carry out soil and water conservation work—planting trees and grass, and building terraces.

Building reservoirs in the middle and upper reaches - the key to controlling the Yellow River

Downstream: Reinforce levees; strengthen reservoir construction and management, and enhance awareness of water conservation and water protection

Yellow River PPT, the third part of the content: the cold flood of the Yellow River:

⑴Two conditions for the formation of cold floods:

① Lower latitudes flow to higher latitudes.

②Frozen rivers in winter.

⑵ Distribution sections of the Yellow River during flood season:

The upper reaches are from Lanzhou to the vicinity of Dengkou in Inner Mongolia; the lower reaches are from Huayuankou in Zhengzhou to the estuary.

⑶Time of the Yellow River Flood:

① When it freezes in winter: Because high latitudes freeze first and low latitudes freeze later, floating ice flows toward high latitudes, forming ice dams and river water rising.

② When the ice melts in spring: high latitudes melt later and low latitudes melt first. Ice floes flow toward the latitudes, forming ice dams and river water rising.

Yellow River PPT, Part 4: Reasons for the flow interruption

Little natural water supply

Industrial and agricultural production and population’s daily life consume large amounts of water.

Yellow River runoff seeps down from loose soil

In recent years, due to atmospheric warming and strong ground evaporation, the Yellow River runoff has a long water path, and the amount of water loss gradually increases along the way.

Keywords: Shanghai Education Edition Geography PPT courseware for seventh graders, Volume 1, free download, Yellow River PPT download, .PPT format;

For more information about the "Yellow River" PPT courseware, please click the Yellow River ppt tab.

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Update Time: 2024-09-08

This template belongs to Geography courseware Shanghai Education Edition Seventh Grade Geography Volume 1 industry PPT template

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