Problems and common causes of flooding
.Consideration on flood may consider the factors 2 issues, namely, consider a problem or what caused the flood. And consider the factors causing the flood
2.1.Consider the problem or what caused the flood can be divided 3 case is from the sky. น้ำจา water source to store water and seawater
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2.1.1 floods from the blue water (Precipitation). The water sky refers to a state of water falling from the sky. Maybe style, rain, snow, dust, or hailstones. Generally considered the rain is the main factor causing floods.The kind of big, 3 type is
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1).Thunderstorm, a gust of wind back back and forth. Or blows to move in the same direction. May be caused by the storm weakens and reduce the severity of the wind down. Caused by inadequate or low pressure, religious place, there may be no certain direction.Any of the rain right will be rain, windy
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2).Tropical cyclones such as hurricane, typhoon, cyclone, which are all large cyclone as well. And it will happen or the formation of the sea. If above the equator. The direction of rotation is counter-clockwise.By different names according to place of birth, the
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2.1) Hurricane (Hurricane) is the name of the cyclone was west of the Atlantic as the Florida, United States. The Gulf of Mexico. The Caribbean Sea.
2.2) typhoon (Typhoon) is the name of the cyclone over the Pacific Ocean west of the South China Sea area, such as the Gulf of Tonkin. Japan
2.3) cyclone (Cyclone) is the name of the cyclone in the Indian Ocean, the north, such as the bay of Bengal, the Arabian Sea, etc., but if this storm caused the Timor Sea and northeast of Australia. Are called.(willy-willy)
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2.4) tropical storm (Tropical storm) occurs when tropical storm large languish while moving in the sea. And speed at the center to decrease when the moving inshore
2.5), depression (Depression) occurs when the reduced speed of a tropical storm. Which produces a normal or heavy rain, thunderstorm
3).Tornado (Tornado) is the name of the cyclone in the Americas. A small size or diameter less, but rotate at high speed. High speed than the cyclone center or otherBorn in both on land and in the sea, if born in the sea, called the waterspout (water spout) can sometimes happen from the clouds in the sky, But turn handed down from the sky, not the ground is shaped like a trunk. So called tornado
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2.1.2 water from water source or control system (Control System), such as dams, reservoirs, irrigation dam floodgate., etc. the main cause Enough to make the flood is (1) drainage of excess in large quantities.This case will cause the flood basin along both sides of the river downstream in a manner gradually flooded, and (2) flood caused by the failure of the control system Such as the dam break, reservoir fracture floodgate may not act.Violent than cataract. And the damage caused is more too
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2.1.3 flooding from the sea water, in the area near the sea. The flood caused the sea level for high in the flow and flood the area directly. With water flowing back into the river.Up until the well off flooded areas, two side. And the hinder of drainage basin area on the If the floods in such areas. There will be more and more long more floods
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