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Flood China 1931
Transcript of Flood China 1931
The Yangtze, Yellow and Huai rivers
In todays presentation I will be talking about...
What is a Flood?
A flood is an overflow of water which is usually caused in dry lands. Sometimes a river receives to much extra water, either from a heavy rainfall or other natural disasters. Depending on their type, floods can develop very slowly over time after vast rains or in just a few minutes, very quickly, without any sign of rain.
The Yangtze River
The Yangtze River runs through southern China, one of the most populated areas on Earth. The region’s people, most of who lived at circumstantial level, depended on the river for water, for their personal and farming needs. In April, the river-basin area received far-above-average rainfall. When torrential rains came again in July, the stage was set for disaster. The Yangtze flooded over a 500-square-mile area. The rising waters drove 500,000 people from their homes by the beginning of August.
The Yellow River
The Yellow River in China is likely to flooding, due to the spacious area of largely flat land around it. For centuries, the farmers living near the Yellow River had built dikes to contain the rising waters, caused by silt increasing on the riverbed.
The Huai River flood soon reached Nanjing, the capital of China at the time. Millions died of drowning while some died from starvation or from waterborne diseases such as cholera and typhus. On the evening of 25 August 1931, the water rushing through the Grand Canal washed away dikes near Gaoyou Lake.
The Great Canal
How Can Floods Occur?
Floods occur because of heavy rains, a river over flowing, a dam, a tsunami, or melting snow. The word 'flood' comes from an old english word meaning 'a flowing of water, river or sea'.
About The Flood
(Depending on river)
Physical Damage to Land, Property
Death Toll, Number of Injuries
Do We Have The Ability To Predict A Flood?
Around 4 million people died, 28.5 million were affected by the flood, many died from drowning and starvation. Lastly, some people died from diseases such as, cholera and typhus.
Predicting floods is very tricky. They depend on a complex mixture of rainfall, soil moisture, the recent history of precipitation, and much more. Snowmelting and storm flows can also commit to unexpected flooding.
110, 000 km
Before The Flood
In 1928-1930, there was a long drought, the lack of rainfall made rivers lower, and the soils dried up.
How Can We Prevent A Flood From Harming Us?
Structures should not be built in a flood plain. (which is an area where floods happen)
Keep your furnace, water heater, and electric panel high especially if you live in an area where flooding is likely to occur.
If you find yourself under a flood warning, make sure to pay attention to the radio or television warnings.
Avoid contact with flood water, it may contain oil, gasoline, raw sewage or any materials.
Go to higher ground and avoid area's where objects are floating.
Do not try to walk across streams or through flooded roads.
This effected life in China because people, animals and crops/vegetation weren't getting enough water.
The water stayed on land for about 3-6 months.
Then, heavy snowstorms occurred during the winter of 1930s followed by extreamly heavy rains in the spring.
Also, in July of the year 1931, 7 cyclones hit. This was a shocking number since there was only an average of 2 cyclones per year.
The Chinese economy also took a tribute after the floods. 0rganizations were set up to deal with the flood problems, but there was little funding and the representatives were only able to construct small dams.
The flood killed crops, washed out grain storage facilities, leveled houses, and destroyed roads. Many rural communities were homeless and stranded without food, and without any way for aid to reach them. The flooding was so bad that the ground was still underwater when fall arrived, which meant that farmers couldn't even plant crops for the next year.
China had to take out loans from other countries, like the United States. The government tried to create jobs for the people by hiring them to rebuild roads and dams.
Technology Used To Predict A Flood
Meteorologists use a variety of tools to predict floods. These tools include satellites, rain gauges, Airborne Lasers and Weather Radars. Airborne lasers are attached to airplanes. They scan the area to see if there are changes. Weather radars show where rain is falling. These are some of the tools that meteorologists use to predict floods.
The technology was not advanced, the area had been rural. So no protection was built
Increased by 17,270
Movemnt of Reaction
During the food the Chinese tried to escape but could not because there were numbers of floods that occurred at different time periods. People tried to escape by boat and by foot, not a lot of people had accomplished that.
Death Toll, Number of Injuries
How Can We Prevent A Flood From Harming Us
Do We Have The Ability to Predict A Flood
What Is A Flood
How Can Floods Occur
Before The Flood
The 3 Rivers
Movement of Reaction
Physical Damge to Land, Property
Specific Event & Date