Natural Disaster - Floods

"Natural Disaster"

Floods

Floods are the maximum common sort of herbal catastrophe and arise whilst an overflow of water submerges land this is typically dry. Floods are regularly because of heavy rainfall, fast snowmelt or a typhoon surge from a tropical cyclone or tsunami in coastal areas.

Floods can purpose substantial devastation, ensuing in lack of lifestyles and damages to private belongings and essential public fitness infrastructure. Between 1998-2017, floods affected extra than 2 billion human beings worldwide. People who stay in floodplains or non-resistant buildings, or lack caution structures and focus of flooding hazard, are maximum susceptible to floods.

There are many reasons for which flood can occur and a few are given below.

1. Heavy rainfall is taken into consideration to be the number one reason of floods. When heavy rainfall takes place in a quick quantity of time and if there may be no right drainage device there could be an accumulation of a big quantity of water in a small place that could bring about flooding.
   
2. Siltation in rivers- with an elevated attention of sand and clay debris withinside the river bed, the water wearing capability of the river is reduced. This will cause floods whilst there may be heavy rainfall.
   
3. Blockage of drains may be taken into consideration because the number one reason of floods in city areas.
   
4. Melting down snow and ice because of international warming ought to cause growing sea stages which leads to floods.

Types of Floods

There are different types of floods. Each one is divided based on the factors of how it occurs and the damage it causes.

• River floods are brought about whilst steady rain or snow soften forces a river to exceed capacity. Flooding of the river In the event of heavy rainfall for an extended period, the water level of the river rises, which decreases the ability of the river bed to hold excess water, which will cause the river to flood. river. of the river could cause excessive damage to surrounding areas, it could destroy agricultural fields.To prevent the river from flooding, adequate defense must be put in place around the river so that even if the water level rises when it rains heavily, the river does not overflow.
  

• Flash floods are because of fast and immoderate rainfall that increases water heights quickly, and rivers, streams, channels or roads can be overtaken. Flash floods In the event of heavy rains and the soil is unable to absorb water as quickly as expected, flash floods can occur. Flash floods could be avoided by providing adequate drainage so that even though the soil cannot absorb water, it can be drained easily.
  
  
  
• Coastal floods are because of hurricane surges related to tropical cyclones and tsunami. Coastal flooding is often caused by extreme windstorms. Rising sea levels, extreme weather conditions and high tides can be considered the main cause of coastal flooding. be the most dangerous of all types of flooding. Sea level rise occurs as a result of melting snow and ice, which is a result of global warming, could be considered the cause of coastal flooding.
  
  
  

Between 80-90% of all documented screw ups from herbal dangers for the duration of the beyond 10 years have resulted from floods, droughts, tropical cyclones, warmness waves and intense storms. Floods also are growing in frequency and depth, and the frequency and depth of severe precipitation is anticipated to retain to boom because of weather change.

Methods to Control Flood

There are flood control methods that can be used to control flooding that could be implemented by the government. Planting greenery to retain excess water and leveling slopes to slow down the flow of water downstream are some of the methods used in ancient times. Other methods of flood control include checking the water level in dams and regularly monitoring dams. Installing rock beams, sandbags, and maintaining a normal slope could also be done to prevent water from overflowing.
            
        Flash floods could be avoided if the drainage system is properly reinforced. a system should be developed to store excess water whenever it rains heavily. The collected water could be used for rainwater harvesting.

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