Causes And Effects Of Floods And Droughts Pdf


By Horaz A.
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08.12.2020 at 09:47
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causes and effects of floods and droughts pdf

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What are the consequences of floods?

This creates a water shortage that damages crops, livestock, and the environment. Since droughts adversely impact the agricultural industry, those that depend on the commodities from the industry suffer as well. Food becomes more scarce and demand exceeds supply. Prices go up, and the commodities markets waiver. If the economy is already in a state of depression or recession, a drought can increase that state. Climate change can also amplify the effects of a drought.

What Causes Floods? Top 8 Common Causes of Flooding

Flooding is experienced all over the globe and for a variety of reasons — but why exactly does flooding occur? There are several human causes of flooding, including poorly designed infrastructure. There are also natural reasons flooding happens. Here are eight of the most common causes of flooding, both natural and human-induced. And the consequences of flooding can be savage. The simplest explanation for flooding is heavy rains. No matter where you live, you are surrounded by infrastructure and systems designed to move rainwater into appropriate basins and reservoirs.


to substantial investment on mitigation of flood and drought impacts and their Natural hazards cause severe economic losses worldwide [1]. Available online​: arc2climate.org%20a%20Glance%


What Causes a Drought?

Other methods include levees, dikes, dams, retention or detention basins. Communities preferred improvement of drainage structures with detention basins near the sites. Floods are caused by many factors: heavy precipitation, severe winds over water, unusual high tides, tsunamis, or failure of dams, levels, retention ponds, or other structures that contained the water. During times of rain or snow, some of the water is retained in ponds or soil, some is absorbed by grass and vegetation, some evaporates, and the rest travels over the land as surface runoff.

A drought is a prolonged period with less-than-average amounts of rain or snow in a particular region. The severity of the drought depends on the amount of time that a region receives below-average precipitation. This is called a flash drought. A drought is caused by drier than normal conditions that can eventually lead to water supply problems.

What is a drought? Its impacts result from the interplay between the natural event less precipitation than expected and the demand people place on water supply, and human activities can exacerbate the impacts of drought. What causes a drought?

What Causes a Drought?

Drought is a natural phenomenon in which rainfall is lower than average for an extended period of time. Periods of drought can result in inadequate water supply and can lead to public health problems.

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Flood control methods are used to reduce or prevent the detrimental effects of flood waters. Floods are caused by many factors or a combination of any of these generally prolonged heavy rainfall locally concentrated or throughout a catchment area , highly accelerated snowmelt , severe winds over water, unusual high tides, tsunamis , or failure of dams, levees , retention ponds , or other structures that retained the water. Flooding can be exacerbated by increased amounts of impervious surface or by other natural hazards such as wildfires, which reduce the supply of vegetation that can absorb rainfall. Periodic floods occur on many rivers, forming a surrounding region known as the flood plain. During times of rain, some of the water is retained in ponds or soil, some is absorbed by grass and vegetation, some evaporates, and the rest travels over the land as surface runoff.

Floods are the most common natural disaster in the United States. According to the National Weather Service, floods kill 95 people a year on average. Global warming is causing more floods. As temperatures rise, the air holds more moisture. Rainfall becomes less frequent, creating droughts. At some point, the skies release their moisture in a torrential downpour. That creates floods.

2 Comments

RГ©my A.
17.12.2020 at 15:19 - Reply

The lack of precipitation as well as heavy downpours are.

Toussaint B.
18.12.2020 at 06:31 - Reply

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