The cause of the flooding from nature are as follows:Heavy rain from the storm or ■ thunderstorm is a storm that occurred for several hours. Heavy rain quantity may not flow into pay. so low in, flood areas, often occurs during the rainy season or summer.■ Heavy rain from tropical cyclone When this storm is that one for a long time, or almost no movement will make the area with heavy rain, contact. The more violent storm violent storm size, much like a hot zone or typhoons. When moving to where it makes the storm force winds. Heavy rains have flooded a wide area and arrest warrant. In addition, if the frequency of storms that moves into or through occurs. Even in a short range, but it always causes flooding.■ In the forest on the mountain torrent, making water on the mountain or the source of water. There are severe and flow into the flat Hill. Flooding up all of a sudden. Called the sudden flood. Occur after heavy rains during the short period of time, or before the rain will stop falling often occurs in small streams near beginning, especially now that the water of the basin area. The water level will go up quickly. Nearby provinces with high mountains, such as Chiang Mai, etc.To reinforce the effect of the sea water · In the distance, the Sun and moon are in a way that causes the sea level to rise a maximum of. The sea will underpin high levels of water in the river. Coinciding with the period when the water from the mountains flow into the forest and river. Make river water may not flow into sea. Cause of flood and water flooding by a wide area or if there is heavy rain, the storm occurred in this range. Damage from the flood of this type will be very.■ There are strong monsoon wind results from. Southwest monsoon is the monsoon moisture from the ocean, borne into the country India Thailand. From May to October, when there are strong for a period of several days, strong winds cause waves. The water level in the sea along the edge of the coast will be higher. With heavy rains causing flooding. If there is a storm occurs in the South China Sea monsoon will ensure it has power. The section North East monsoon blows in from China into Thailand. Clash of the South eastern edge of the monsoon this occasional power. When a high pressure area in China, there are harder to make waves in the Gulf of Thailand, and a fairly large sea level is higher than normal, sometimes cause heavy rains in the southern province of Chumphon, from down to cause a flood wide area.■ Result of earthquake or volcanic blast. When an earthquake or volcano on land and underwater volcanic bombs. The bark of some Earth surface will be outraged. Some parts of the world to some higher surface collapses. Big waves in the ocean, causing the crashing landing. By flooding the city and the islands coastline. Frequently occur in the Pacific Ocean. The cause of the flooding from the actions of human beings. Are as follows:Deforestation · In vulnerable areas when the heavy rain will cause the maximum flow rate and flow faster. Adding water to break the severity and cause of the landslide is still with. It also makes the soil and roots are large wooden wash, water flows down in the stomach. Make shallow waters could not be drained instantly, including causing a loss of life and injury of the people via the water.· การขยายเขตเมืองลุกล้ำเข้าไปในพื้นที่ลุ่มต่ำ (Flood plain) ซึ่งเป็นแหล่งเก็บน้ำธรรมชาติทำให้ไม่มีที่รับน้ำ ดังนั้นเมื่อน้ำล้นตลิ่งก็จะเข้าไปท่วมบริเวณที่เป็นพื้นที่ลุ่มต่ำซึ่งเป็นเขตเมืองที่ขยายใหม่ก่อน· การก่อสร้างโครงสร้างขวางทางน้ำธรรมชาติทำให้มีผลกระทบต่อการระบายน้ำและก่อให้เกิดปัญหาน้ำท่วม· การออกแบบทางระบายน้ำของถนนไม่เพียงพอ ทำให้น้ำล้นเอ่อในเขตเมือง ทำความเสียหายให้แก่ชุมชนเมืองใหญ่ เนื่องจากการระบายได้ช้ามาก· การบริหารจัดการน้ำที่ไม่ดีเป็นสาเหตุหนึ่งที่ทำให้เกิดน้ำท่วมโดยเฉพาะบริเวณด้านท้ายเขื่อนหรืออ่างเก็บน้ำ
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