** According to the Millennium Ecosystem Assessment, the number of flood events in all the continents(except Australia) have steadily increased in the last 50 years. In which Asia is most adversely affected by floods.
Distance Direction of El NinoFrom the Sea the Wind Ocean DistanceRelief Currents From Equator
*CausesWhat people do What is thethe think? actual reason? At the local level:At the local level: The actual reason of floodsOverflow of Yamuna river in our locality is the lack ofdue to excess rain in Delhi. proper drainage system. Otherwise, in the presence of proper drainage system the flood water would not be able reach our locality. It would seep away through the drainage pipes.
*Causes What is the actualWhat people do the reason?think? At the regional level:At the regional level: The actual reason is the excess and extended rainfall in DelhiDelhi: Overflow of Yamuna and Yamuna Nagar district,river due to the excess Haryana (the district ofwater release from the Dam Hathikund barrage).Hathnikund Barrage. Due to the excess and extended rainfall the authorities are forced to release water which gives a rise to Yamuna causing flood in the low lying areas of Delhi.
*Causes What is the actualWhat do the reason?people think? At the national level :At the national level: • Disturbed monsoon pattern: Floods• Excess rainfall activities have steadily increased• Sudden release of water in the last few decades due to the from reservoirs human interference in the• Cyclonic disturbances (at monsoon patterns. Monsoon has coasts) become more unpredictable due to the interference in the atmospheric pressure caused by green house emissions. • Ground cover: The movement of slides beneath the earth’s crust is a major cause for flooding. It leads to tsunamis. It is a natural cause for floods to occur.
*Causes What is the actualWhat do the reason?people think? At the national level :At the national level: • Landslides: It leads to• Excess rainfall obstruction of flow and change in• Sudden release of water the river course. This can be seen from reservoirs in the mountain regions• Cyclonic disturbances (at particularly near Himalayas coasts) • Drainage Failure: There are unauthorised colonies made by the local people on open land without considering city plans, drainage etc. and thus are subject to flooding during rainy seasons
** Flood causes huge number of injuries and deaths. Every year around billions of people die all around the world. In 1996, the monsoon floods in India affected more than 5 million people in northern and eastern parts of the country. Many were left homeless and starved.* Those people who work on daily basis are immensely affected by the floods.* Due to shortage of supply of goods and huge demand the price level rises, this causes problems for the common man to buy the goods.* Flooding usually brings infectious diseases e.g. plague, dysentery, common cold, fever etc. And for those areas where there is no electricity supply, food poisoning may occur as food may not be properly frozen.