How Flood is Occur

 

Floods occur as a result of heavy rainfall and also include natural disasters and occur when overflowing water inundates lands that are normally dry. Floods are caused by heavy rainfall, rapid snowmelt or storm surges from tropical cyclones and tsunamis in coastal areas.

A flood can cause widespread devastation, resulting in loss and damage to personal property and critical public health and infrastructure. Between 1998 and 2017, floods may affect more than 2 billion people worldwide. People who live in a flood zone or in buildings that are not resilient or do not have warning systems to take steps to raise awareness of the dangers of flooding.

There are 3 common types of how a flood occurs

Rivers are the most important part of causing flooding during heavy rains on the Moon, many dams break during heavy rains as the rapid flow of water affects farmers’ crops and high water levels in cities.
Rivers Floods occur when sustained rainfall or snowmelt forces a river to exceed capacity.
Many coastal floods are caused by storm surges associated with tropical cyclones and tsunamis.
Flash floods are caused by storm surges associated with tropical cyclones and tsunamis.
Between 80–90% of all documented disasters caused by natural disasters in the past 10 years resulted from floods, drafts, tropical cyclones, heat waves and severe storms. Floods have also increased in frequency or intensity, and the extreme population is expected to continue to increase due to climate change.

How floods occur in the diagram

The diagram shows that there was a flood:

Rainfall intensity and duration
The steepness of the terrain
High tide prevents the river from draining
Increase the water level and humidity
Flash floods occur within hours of torrential rains with little or no warming and dissipate quickly. it is the most common flood in the Pacific Ocean in 7 island countries.
Slow onset of flooding due to gradual Relatively long period and is only a characteristic of river system like Sepik, & P.NG.
Preventive measures against floods

How the flood occurs

In this year’s Assam flood, most people died in Assam floods. during floods you should take certain steps to protect yourself, your homes and your family during floods.

Gather emergency supplies including non-perishable food and water. To save at least 1 gallon of water per day for each person and each of your animals. store supplies for at least 3 days.
To update and listen to local radio or TV.
To leave areas such as floodplains, low spots, canyons, washouts, etc. Avoid flooded areas.
It will turn off your house mains and turn off the power and switch the main gas value.
Take your outdoor items (furniture, grills, trash can) or a tie before going to safety.
After the flood

Do not drive in flood areas and avoid when the vehicle should lose control during the flood
Avoid drinking flood water or using it for washing dishes, brushing teeth or washing/preparing food. Drink clean and safe water.
If you have evacuated, do not return home until local authorities say it is safe to do so.
When in doubt, dispose of any food and water bottles that may have come into contact with flood water.
Never go outside during a flood, avoid walking from one place to another after a flood
Initial damage is due to flooding, it is not a risk. As with the small range type, this is normal damage. The most important thing is that it does not stand in flood water, it can also spread infections, diseases, bring chemical risks and cause injuries.

Clean floors, walls, and other surfaces in the home with soap and water and stand out with a solution of one cup of bleach to five gallons of water

Causes and effects of floods

The flood is caused by atmospheric conditions that lead to heavy rainfall and rapid melting of ice. In terms of geography, it can also increase the likelihood of flooding. For example, areas near rivers and cities are often at risk of flash floods.

A flood is the overflow of water into land that is normally dry. Floods can happen almost anywhere. They can cover an area with just a few centimeters of water, bringing enough water to cover the roof of a house. A flood can be dangerous for commodities and can last for days or weeks and sometimes longer.

Various situations cause a flood

• Heavy rain
• Melting ice or snow causes a storm surge
• Breach of levees or dykes
• Ocean wave coming to the shore, such a storm.

V Geographically, it can also increase the likelihood of flooding in an area. For example, areas near rivers are often at risk of flooding. Urban areas (areas close to cities) are also at higher risk of flooding because roofs funnel rain down to the ground and paved surfaces such as highways or parking lots prevent the ground from absorbing the rain.

Mountains and hills should also increase the flood risk area. Rain or snowmelt running off the mountains can cause streams and rivers to rise rapidly. If a storm persists over the mountains, a stream only 6 inches deep can swell to 10 feet deep in less than an hour.

A flood is a body of water that occupies land that is normally dry. it is a widespread natural phenomenon that can affect millions of people worldwide. Drinking water can also be contaminated by flooding and contribute to disease. They are mostly caused by rivers, but floods can also occur from flooding lakes and seas.

When dams break, a flood can take many forms. Such as in the form of heavy rainfall, In addition, the loss of snow also contributes to floods. Floods contribute to the widespread and immense spread of water, but are not considered healthy for drinking purposes.