"Rivers" China's Natural Environment PPT Courseware 2

Description

"Rivers" China's Natural Environment PPT Courseware 2

learning target

1. Ability to read and analyze pictures:

A Able to fill in the names of major rivers and lakes in my country on the blank map

Able to tell the hydrological characteristics of outflow rivers and inflow rivers

B Use the map to describe the provinces, terrain areas, major cities, main tributaries, and upper, middle and lower reaches of the Yangtze River and the Yellow River.

2. Written expression ability:

Summarize the advantages and disadvantages of the Yangtze River and the Yellow River, and analyze the causes and solutions to the disadvantages

Basic characteristics of rivers in my country

1. Many rivers

2. Abundant water: ranking fifth in the world after Brazil, Russia, Canada, and the United States.

3. The water energy reserves are huge: ranking first in the world.

Self-study guide: Look at the pictures and memorize the names of the following rivers

Heilongjiang, Liaohe, Haihe, Yellow River, Huaihe, Yangtze River, Pearl River, Lancang River (into the Pacific Ocean)

Nu River, Brahmaputra River (into the Indian Ocean)

Irtysh River (empties into the Arctic Ocean)

tarim river

Hydrological characteristics of inland rivers

seasonal rivers;

The river water comes from the melted water of ice and snow in the mountains. Summer is the flood season and the flow is dry in winter. The flow is short.

tarim river

The longest inland river in my country

Water source: melted ice and snow from Tianshan Mountains and Kunlun Mountains

Reasons for the decrease in downstream water volume: evaporation, leakage, water diversion for irrigation

Qinghai Lake (Qinghai): my country's largest lake and largest saltwater lake

Poyang Lake (Jiangxi): my country’s largest freshwater lake

Dongting Lake (Hunan): the second largest freshwater lake in my country

Taihu Lake (Jiangsu): The third largest freshwater lake in my country

Explain the reason why the Dongting Lake area has become smaller

1. Land reclamation from lakes

2. Soil erosion and sedimentation

Governance measures:

1. Return farmland to lakes

2. Plant trees and conserve soil and water

Analyze the reasons for the Yellow River’s drying up

Natural reasons: There is little precipitation in the Yellow River Basin and uneven seasonal distribution;

Man-made reasons: huge increase in water consumption

measure

Divert water across river basins and build reservoirs;

Reasonably allocate water consumption and save water.

Explain the origin of the "above ground river" in the lower reaches of the Yellow River

1. The middle reaches flow through the Loess Plateau, causing serious water and soil erosion;

2. The downstream flows through the North China Plain. The terrain is low and flat, the flow speed slows down, and sediment is deposited, forming an "above ground river".

measure

1. Carry out water and soil conservation work in the upper and middle reaches to control water and soil erosion;

2. Build embankments downstream and strengthen embankments;

3. Construct water conservancy projects.

Figure (A) shows the flow comparison chart of the Songhua River, Yellow River, Yangtze River, and Pearl River.

1. The Songhua River is represented by ___, and the reason for judgment is ____; the Yangtze River is represented by __, and the judgment reason is ___; the Pearl River is ___, and the judgment reason is _____.

2. In the flow diagram, the rivers with ice formation are _____ and _____, and the basis for judgment is _____.

3. Are the rivers with the largest flow in the four flow charts consistent with the distribution areas with the most precipitation in the temperature curve and precipitation histogram? _____, explain the reasons for the agreement or inconsistency _____.

Read the annual runoff change diagram of my country's four rivers (Songhua River, Yellow River, Yangtze River, and Pearl River) and complete the following requirements:

(1) Fill in the curves A, B, C, and D which represent the annual runoff of the river.

(2) Among the four rivers, the one with the longest flood season is , the one with the largest annual runoff is , the one with the largest sand content is , and the one with the longest winter freezing period is .

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For more information about the "China's Natural Environment Rivers" PPT courseware, please click the China's Natural Environment ppt Rivers ppt tag.

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Update Time: 2024-11-22

This template belongs to Geography courseware People's Education Edition Geography for Grade 8 Volume 1 industry PPT template

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