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winds can reach over 100 km/h. These can also be called hurricanes or typhoons. The "eye" of the cyclone The of a tropical cyclone often has clear skies, and light winds. The sizes range from under 10 km, to over 100km. This eye is surrounded by a cloud which is usually 16km high. What is a Tropical Cyclone? A tropical cyclone is a low pressure system that forms over warm tropical waters. They have very high speeds, which can usually last for about six hours. These strong winds can reach the distances of over 100 kilometers stretching from the core of the cyclone. Long term affects The long term effects of a tropical cyclone can include:
•Contamination of water
•And famine Short term affects The short term effects of a tropical cyclone can include
• And loss of home and land Cyclone Prone Areas in Australia, n.d., map, Emergency Managment, accessed 04 March 2013, <http://www.ema.gov.au/www/ema/schools.nsf/Page/Learn_AboutCyclones_ReadyandAble_ReadyandAble>. TROPICAL CYCLONES - Technical Hazard Sheet - Natural Disaster Profiles 2013, World Health Organization, accessed 04 March 2013, <http://www.who.int/hac/techguidance/ems/tropical_cyclones/en/index.html>. Weather Disasters in Australia Share FLOODS Flooding is when the water level rises in a creek, river or lake and covers the land that is usually dry. The water builds up on the surface and has no place to go. Picking up leaves, dirt and twigs along with it clogging up draining pipes and vents. Flooding occurs all over the world and in some places occurs regularly. The rise of water level can be due to many things but in Australia heavy rainfall is the most common. Some are thunderstorms that deposit a large amount of rain or unexpected flooding that we call flash flooding and also hurricanes or cyclones. Severe floods can knock down buildings that have taken years to build and sweep away bodies that are sometimes never seen again. Floods are dangerous and can take away everything you had in minutes. what is a flood
Take only the important things with you e.g. photos, jewelery, spare pair of clothes, radio etc. you can also place sandbags around your property as well as putting rags under the doors to help prevent some of the water coming in the house. You can also make sure that you have a plan and have a place to go when you have to evacuate the area when the flood is coming. Making sure you only take your important possessions. A lot of things in your house can still get damaged during a flood so getting insurances for your family and your house is a good idea. If you live in a flood prone area what are some of the ways to protect yourself and your house???
Australia is well known for being hot and dry this makes the ground hard and condensed from lack of water. So when a creek or river floods over it doesn’t drain as quickly because the water can’t soak into the ground. This makes the flood water sit there and slowly seep into the condensed dirt or be slowly drained away. By the flood water sitting there it can wash away crops and drown animals. As well as washing away houses, buildings and treasured possessions. Droughts cause the ground to go hard too so when we finally have rain. The rain has nowhere to go and causes the area to flood. why do floods occur in Australia??? Thank you for watching! Cyclone prone areas in Australia Some of the long term effects from a flood is the clean-up from all the houses and buildings that were destroyed. Also the farmers in the area their crops get swept away by the water and that gives them no income. Losing crops means losing money. Then the prices of food are put up so that they still make a profit. But then more people can’t afford food since they lost everything. Also animals can drown in the waters or be swept away. Animals are another source of income for farmers and losing the animals means losing more money. Also losing friends and loved ones because they cannot be replaced. what are some of the long term effects of flooding??? Some of the short term effects from floods are power disruptions and communication links broken. Because you can’t contact your family of friends to tell them that you’re ok. Also transport is an issue. Most of the cars in the street or car parks were washed away and destroyed. The subways would be closed as well as trams also health problems. The flood waters would be crawling with bacteria and it can be extremely easy to catch something. As easy as it is to catch something it is usually a good idea to get it checked out by a doctor. what are some of the short term effects of flooding??? The most common reason they occur in Australia is because of El Niño's and La Niña’s. An El Nino is a summer that’s hot and dry. A La Nina is a summer that is tropical. Why Tropical Cyclones occur in Australia there are three types of floods that are common in Australia. name then describe them briefly flash floods- flash floods are large amounts of water flooding a area fast. they are unexpected and dangerous.
overflow of major rivers- too much water for the creek or river to hold. water has no place to go. The difference between a tropical cyclone and a tornado is that a tornado usually has a diameter of 100s of meters, and starts from either one severe storm, or a cumulonimbus cloud, where as a tropical cyclone has a diameter of over 100km, and can start from over several storms. There is no difference between a cyclone and a tropical cyclone. Difference between... category damage severity wind 1 2 3 4 5 Negligible house tropical cyclone 90-125km/ph Minor house tropical cyclone 125-160km/ph Some roof and structure severe 165-225km/ph Significant roof and structure severe 225-280km/ph Severely dangerous severe +280km/ph Categories of Cyclones Cyclone Tracy Cyclone Tracy was Australia's worst of all cyclones, with damage to hundreds of acres of land, 65 lives lost, and gusts of wind up to 217km/ph, it was small but deadly. It occurred on the 20th of December 1974, in the Arafura Sea, it moved slowly southwest, passing Bathurst Island on the 23rd and 24th. It then turned and headed towards Darwin, where it hit on the Christmas Day. The reason that this cyclone caused so much damage, is because people weren't prepared. A warning was sent out, but people didn't listen. some died in the city, few died at sea. This type of thing makes us realize that we have to prepare for natural disasters, even if they are more or less severe than we think. At 96 hours until landfall, there are no signs of a storm, but there are light winds, and a few clouds. At 72 hours, nothing much has changed except for a swell on the surface of the ocean and waves will come every 9 seconds. At 48 hours, the sky is free of clouds and wind. The swell has risen and the waves come every 8 seconds. At 36 hours, the signs of a storm start to appear. The winds are picking up, and the waves are 7 seconds apart. The cyclone watchers are at ready, and the towns nearby are told to ready for evacuation. 30 hours, the sky is covered in clouds, and the winds have picked up. 24 hours, the waves are covered in white-caps, and the foam has reached surface. 18 hours, the clouds are thick and drizzly, and the wind is hard to stand against. And at 12 hours, the rain is getting heavier, the clouds are getting lower, the waves are getting closer to the streets, and the wind is reaching 120km/ph. After this, homes are told to evacuate. Signs of an approaching storm Black Saturday Bush Fires The Black Saturday Bush fires in Victoria, were the worst of all Australian bush fires. 173 people died, 414 injured, and over 4,500km2 were burnt. They appeared on the 7th of February 2009, and lasted until the 14th of March 2009. The source of ignition was:
land was ruined including farmland, and housing. Difference Between... Outline a major flood that has occurred in Australia one of the major floods in Australia was the Queensland floods in December 2010. over 70 towns and 200,000 people were affected. and the damage was estimated at around 25 million dollars. three quarters of the state was declared a disaster zone. the floods killed 35 people as well as 9 people missing. volunteers quickly helped and raised over 30 million dollars was raised to help. The difference between a tropical cyclone and a tornado is that a tornado usually has a diameter of 100s of meters, and starts from either one severe storm, or a cumulonimbus cloud, where as a tropical cyclone has a diameter of over 100km, and can start from over several storms. There is no difference between a cyclone and a tropical cyclone, because they are the same thing, just with different names; it can also be called a typhoon. difference between... Get The Facts- Flooding n.d., Australian Government, accessed 15 March 2013, <http://www.ema.gov.au/www/ema/schools.nsf/Page/Get_The_FactsFloods>. http://www.wollongong.nsw.gov.au/floodplaineducation/Flood%20Education%20Model/Flood.html
http://ministers.treasury.gov.au/DisplayDocs.aspx?doc=pressreleases/2012/030.htm&pageID=003&min=brs&Year=&DocType Seawater flooding- seawater flooding is a coastal area that may be prone to flooding when there is a nearby tropical cyclone or severe storm.