"Yangtze River" PPT courseware download

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"Yangtze River" PPT courseware download

Part One: Overview of the Yangtze River

Observe the characteristics of the source of the Yangtze River, the provinces and cities through which the main stream flows, the terrain areas where it empties into the ocean, and the terrain it flows through.

Geographical overview of the Yangtze River

The Yangtze River flows through 11 provinces and regions including Qinghai, Tibet, Sichuan, Yunnan, Chongqing, Hubei, Hunan, Jiangxi, Anhui, Jiangsu and Shanghai, and finally flows into the East China Sea.

Yangtze River water system map

Scenery of the Yangtze River - Tuotuo River Section

The Yangtze River originates from the Tuotuo River on the southwest side of the Geladandong Snow Mountain, the main peak of the Tanggula Mountains. It is the main source of the Yangtze River.

Yangtze River Scenery—Tongtian Reach

The Tongtian River flows on the gently undulating Qinghai-Tibet Plateau. The river valley is wide and flat, the flow rate is slow, and the grassy beaches on both sides are vast, making it a good pasture.

Scenery of the Yangtze River - Jinsha River Section

The Jinsha River flows in the Hengduan Mountains with high mountains and deep valleys. The drop is large, the river is rapid, and the water energy resources are very rich.

Yangtze River scenery——Yibin

It is called the Yangtze River from Yibin in Sichuan Province. It receives many tributaries along the way. The river surface widens and the flow rate increases greatly.

Yangtze River PPT, Part 2: Characteristics of the Yangtze River

Characteristics of the upper reaches of the Yangtze River

The Yangtze River reaches its upper reaches from its source to Yichang, Hubei Province.

In the source area, glaciers hang high, seracs stand in large numbers, and rivers trickle.

The Tongtian River flows on the gently undulating Qinghai-Tibet Plateau, with developed meanders and slow flow, and there are many lakes and swamps on both sides.

The Jinsha River flows in the Hengduan Mountains with high mountains and deep valleys, with a total drop of 3,300 meters and rapid water flow.

The Yangtze River enters the Sichuan Basin and receives many tributaries along the way. The river surface widens and the flow rate increases greatly.

The upper reaches of the Yangtze River flows through the first and second steps of China's geopotential. It has many tributaries, abundant water, and a large gap, and contains abundant water energy resources. There are famous canyons such as Tiger Leaping Gorge and Three Gorges.

think

Where are the Yangtze River floods frequent? What are the reasons for frequent occurrences?

Flood-prone areas: Plain areas in the middle reaches of the Yangtze River

Natural causes:

1. The river course is curved in the middle reaches.

2. The terrain is low and flat.

3. There is abundant precipitation flowing through the monsoon area.

Rich sources of floods

Main branches and tributaries above Yichang;

Dongting Lake and Poyang Lake;

The Han River to the north.

Man-made reasons: The area of ​​lakes in the upper and middle reaches has shrunk, forests and grassland vegetation have been destroyed, and the natural ecological environment has deteriorated day by day.

Characteristics of the middle reaches of the Yangtze River

The middle reaches of the Yangtze River from Yichang to Hukou in Jiangxi Province.

After the Yangtze River leaves the Three Gorges, it enters the plain area. During the course of more than 920 kilometers, the drop is about 40 meters, and the flow speed decreases sharply. In addition, many tributaries merge into it, forming a winding river channel with lakes dotted along both sides of the river.

Jingjiang River has many meanders and is known as the "nine meandering ileum". Floods occurred frequently in history, and there is a saying that "the Yangtze River is thousands of miles long, but the Jingjiang River is dangerous."

Characteristics of the Lower Yangtze River

The Yangtze River flows downstream from the mouth of Jiangxi Lake to the mouth of the sea.

The downstream section of the river flows for more than 840 kilometers, with a drop of less than 20 meters. The water flow is stable and the river surface is wide. Where it enters the sea, the river is more than 80 kilometers wide, presenting a landscape of water and sky.

Yangtze River PPT, Part 3: Golden Waterway

A. Main branches and tributaries have long navigation mileage.

B. The water level is stable, there is no icing period, and the water is abundant (navigable in all seasons below Yibin)

C. The areas along the river are densely populated and rich in products.

Others: Irrigation water sources, tourism resources, "Land of Abundance", "Land of Fish and Rice" forming alluvial plains...

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

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Update Time: 2024-09-26

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