Flood - a flood submerged land in a short period of time. The cause of flooding may be rain and streams, often, storms, earthquakes and the rise of water levels in rivers. Danger of flooding that can lead to death (drowning in a wave of mind which seemed safe) and animals is in his power and sudden onset. Repeatedly rescue teams from around the world travel to the challenges of victims in rubber boats and other special vehicles. Floods also bring serious damage to structures and roads, many of which have to repair after the flood season. It is therefore extremely important to investigate this phenomenon and the dangers inherent in it. In Israel, the flood prone in the main channel of creeks and gullies in the Judean Desert and the Negev.
Causes of floods
A unique combination of climatic and geographic factors creates suitable conditions for the occurrence of floods: an abundant and long-lasting rainfall, water-resistant soil, a large pool of water clusters of rivers and steep slopes leading to it.
Thus, if the rain and the ground do not absorb water, rain streams flow down the surface. Streams merge into streams, which, connecting in turn, flow into streams and rivers. In place of its origin flooding looks like a river that appeared out of nowhere. On steep slopes, rivers and streams are becoming wider, and there are waterfalls. Power of flooding depends on the rainfall and the magnitude of the drainage basin. The more rain falls, the greater will be the flow of water. The larger the catchment, the greater the number seeking treatment there, and the stronger the flow. As mentioned above, flooding can also occur as a result of the disaster, which is added similar conditions.
Floods, as well as an earthquake or fire, strike without warning. The main difficulty in forecasting flooding occurring as a result of rains is the lack of direct communication between the location of rainfall and the place of occurrence of flooding. Sufficient local rainfall in the Sinai desert to the stream of steam on the south of Israel turned into a raging stream and flooded the highway "Arabia." This is an example of how local rainfall and water-resistant soil leads to accumulation of water in small streams, relating to the drainage basin of the creek Parana, originating in Egypt. Water is going to be gathering strength and pressure. The greater the deviation, the more suddenly starts flooding in the Arava Valley, is usually dry and cloudless.