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Sometimes, a river will receive a lot of extra water, either from lots of rain or other natural disasters. When this happens, the water overflows from its normal path in the riverbed and possibly onto dry land. This is called a flood. See the fact file below for more information about floods?or download the comprehensive worksheet pack?which contains two worksheet packs of over 40 pages of information on floods.
- Floods occur because of heavy rains, a river overflowing, broken dam or levy, a tsunami, dangerous coastal procedures, natural ground saturation, infrastructure failures, winter storms or melting snow.
- A flood happens when an overflowing water submerges a dry land.
- The development of a flood varies: it may rise very slowly or in just a matter of seconds after an extensive rainfall.
- The word ‘flood’ comes from an old English word that means ‘a flowing of water, river, or sea.
- The most common type of flood is a river flood. If the river’s capacity is more than its flow rate, then flooding occurs in the surrounding area of the river.
- An extreme river flood is called a flash flood, which carries water ranging from 10 to 20 feet high. This event occurs very fast without warnings or extreme rains. It happens because of a natural or man-made river blockage, such as dams, glaciers or landslides, releasing an immense volume of water.
- Areal flooding also occurs in saturated grounds. The rainwater has nowhere to run, so water is collected and stored in the ground.
- Tropical cyclones, hurricanes, tsunamis and high tidal waves damage coastal barricades, resulting in coastal flooding.
- Floods occur even in the desert.
- Ice jam flooding happens when heavy rain causes ice to break into pieces and push together to create a barricade. The mass of water stored behind the barricade then spills over into the surrounding area. Eventually, the barricade breaks, and the water begins to flow at a rapid speed.
- Rapidly moving water can be dangerous. It is so powerful it can carry a car, house, tree, or person away. Two feet of flood water can push large vehicles away, such as buses.
- Some US states make citizens reimburse the cost of their rescue when they drive into flooded areas.
- 66% of flood deaths occur in vehicles, and most cases happen when drivers make the deadly mistake of navigating through flood waters.
- Even 6 inches of fast moving flood water has the strength to knock a person down.
- Floods may affect a small area or a wide area. It depends on how strong or how extreme it is.
- Flooding poses tremendous danger to both people and property. Since 1900, floods have taken more than 10,000 lives in the United States.
- Usually, 1/3 of flooded roads and bridges are destroyed.
- The Big Thompson Flood in Colorado, 1976, killed 144 people and created almost $40 million worth of damages. 95% of those killed in this flash flood tried to beat the waters along their way, instead of climbing rocks or going uphill to higher grounds.
- Floods can kill people, animals and destroy homes, businesses and even farmland. The 1993 great Mississippi River Flood, covering a 500 mile long and 200 mile wide area, destroyed over 50,000 homes, 12,000 miles of farmland and created $20 billion worth of damages.
- In Ancient Egypt, people relied on the Nile River floods because they created enriched soil for farmers.
- China’s Yellow River, or Huang He, was recorded as the most fatal flood in the world. The shocking floods of Huang He happened in 1887, 1931 and 1938. The deadliest among the Huang He floods occurred in 1931, leaving 80 million people homeless and anywhere between 145,000 – 4,000,000 people dead. It was also in China when the dam of Banqiao breakdown happened in 1975.
- Flood Watch refers to an activity that local authorities do when they inform the public that a flood is about to happen. A Flood Warning is also given, instructing the public to vacate their homes and move to higher areas immediately. People can expect a Flood Watch and a Flood Warning announcement if the rain falls one or more inches/hour for over 3 days in a row.
- By this time, people should have prepared an emergency first aid kit and stored food and candles or flashlights and extra batteries. You should not ignore a Flood Warning after hearing it.
- During a flood, listen for updates from the local authorities. You must move important items to a safe place or higher floor of the house. Do not go out and walk through the road where the water is moving.
- After a flood, stay away from contaminated flood water. If your skin comes into contact with contaminated flood water, wash with soap and uncontaminated water as soon as possible.
- After flood has ended, the risks still remain. The surface of the road will have weakened, the water will be contaminated and there may be unattended gas leaks and fallen cables.
- Floods are unstoppable but there are a few ways of preventing them. Coastal walls can be built to prevent tidal waves as they stop the water from moving to the shore. Retaining walls can be constructed to hold excess water when flooding occurs. Buildings should be constructed so as to avoid blockage of waterways. Do not litter on waterways. Planting trees, grasses and shrubs helps to reduce soil erosion. Learn about proper drainage systems. Give precautions to people. Educate people about floods so that the effects can be minimized. Encourage everybody to listen to Flood Awareness Programs held by schools or local authorities. Build a detention basin or reservoir connecting to the waterway for temporary flood water storage.
This BUMPER bundle contains 22 ready-to-use Flood?Worksheets?that are perfect for students?who want to learn more about?a Flood which is when the water overflows from its normal path in the riverbed and possibly onto dry land.
Worksheet Pack 1:
- Flood Facts
- Flood Word Search
- Fact or Bluff
- Causes of the Flood
- Flood Acrostic
- Effects of the Flood
- A Helping Hand
- Keep Safe
- Fill in the Blanks
- Flood Prevention
- Before and After
Worksheet Pack 2:
- Flood Facts
- Flooded Great Rivers
- Truth or Bluff
- Preventing Disaster
- Flood Awareness
- Flood Wordfind
- Proper Waterway
- I start FL
- Flood Warning
- Floods Around the World
- Which Does Not Belong?
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Link will appear as Flood Facts & Worksheets: http://www.grabillautomotive.com - KidsKonnect, April 5, 2017
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