Flooding is a natural part of the yearly cycle of a river, creating flood plains, levees and various other features. The remains of the “lower bridge” that triggered a 3m wave were demolished and replaced with a larger bridge that would be more difficult to block with debris. Interestingly, Eyjafjallajökull is the name of the glacier that capped the volcano and not the volcano itself.↩, This type of volcanic eruption is known as a subglacial eruption. This increased surface runoff due to a lack of both infiltration and interception, increasing the volume of water entering the River Valency and its tributaries. 1,500 soldiers were sent to help rescue citizens and disperse aid. The Kosi River is highlighted in bright blue. In Bihar, 42% of the population lives below the poverty line. Map from Google. Geography. Whilst spring melt, dams bursting and heavy rains will increase the amount of water in the river channel, many river channels can cope with this. Essays of michel de montaigne. Aid agencies provided rescue efforts, food, clean water supplies and shelter. Where do people live today? The river was forced to flow into a channel that it hadn’t flown through in over 100 years. By early 2005, power and water was back up. Flooding as a source of nutrients was important to Egyptians along the Nile River until the Aswan Dam was built in the 1960s. Narrative essay on if i could go back in time i would historical essay definition Gcse case river geography flooding study 5 paragraph essay rules. 6. Flash flooding also occurred as river banks burst and … The recurrence interval tells you how many years you’d expect to have between a flood of a certain size. Flooding can have numerous social, economic and environmental effects that can vary depending on the demographics of a population and the economic development of an area. ↩, Weird number, I know, I’m just trying to produce a nice round answer here. If the flood happens in a city or a suburb, then flooding can cause catastrophic damage and take human lives. Heavily vegetated lands are less likely to experience flooding. From a teaching and learning perspective, flooding offers several important opportunities because, in order to make sense of these issues, students … Wetlands act as a buffer between land and high water levels and play a key role in minimizing the impacts of floods. Helicopters were also provided but were limited in their effectiveness due to the continued heavy rain. 4. (external link) Informal Settlements: 4. River Processes . … North Cornwall Council provided accommodation for 11 tourists who were unable to return home after the flood. Regular news stories about flooding in the UK make this a topical issue - one to which many students can relate. 1. Thunderstorms can cause flash floods, in which small rivers can swell quickly and carry up to ten times the normal amount of water.Rivers that flow slowly carry water, sand and silt. Floods (weather events where water temporarily covers land it normally doesn't cover) can happen anywhere, but features like geography can actually increase your risk for specific types of flooding.Here are the main types of floods to look out for (each is named for the weather condition or geography that cause them): When there is an outflow of water in a place, it is said to be flooded. Awe and wonder. The geography of the state of Texas makes it vulnerable to some of the heaviest rainstorms in the world, according to data from the Flood Safety Education Project. Flash floods are sudden and unexpected, taking place when very intense rains fall over a very brief period. Scientists point to this trend of sunny day flooding as one way that climate change is affecting our natural environment. Objective: To understand the processes that affect rivers. Stupid/cheap humans will often send this water to the local river or stream so, although roads and streets won’t be flooded by rainwater the entire town will be as the rainwater enters the river. Volcanoes. With no vegetation, the soil is highly susceptible to mass wasting which can cause large volumes of soil to enter a river and reduce the river’s capacity. Floods are a natural part of the water cycle, but they can be terrifying forces of destruction. Insurance claims came in between £15,000 and £30,000 per property. A map of Bihar showing the major rivers flowing through the state. Perhaps unsurprisingly, floods tend to affect low-lying areas most severely. Have an idea for this article? We’d describe it as a 1 in 100 year flood. High water levels have also caused small dams to break, wreaking havoc downstream. ↩, For reference, 1ℓ of (pure) water weighs 1kg. An “Owner Driven Housing Reconstruction” scheme was created, funded by the World Bank, to give money to homeowners to rebuild their homes using bamboo, bricks, corrugated iron & concrete. The location of Bihar in India. As well as prolonged rainfall, brief periods of heavy rain can also lead to floods. Flooding occurs when the amount of water in a river exceeds the capacity of the channel, causing it to burst its banks onto the flood plain. 3. Out of a data set spanning 199 years5, this flood was the 2nd largest in terms of discharge. The most common cause of flooding is prolonged rainfall. In LEDCs, this infrastructure is lacking, so there isn’t much economic damage. 5. Allegations that the grain wasn’t evenly distributed arose though, with members of the lower class of Indian society being left with minimal amounts of grain while the upper classes received most of the grain. 1. The flooding was worsened by the deforestation that had taken place in the Kosi River’s drainage basin. http://www.opengeography.org/physical-geography.html. When the snow does melt, large volumes of meltwater will enter the river increasing its discharge and triggering floods. Houses were flooded and silt, sewage & debris was deposited inside of them. In LEDCs, famines can follow floods which can lead to even more deaths. Page 152 Turn to: Page 152 of Sec 2 Geography textbook 3. The council invested money into improving Boscastle’s flood defences and the Environmental Agency also built new flood defences. If a river’s drainage basin or floodplain has been heavily urbanised, a river becomes much more prone to flooding. A few days after the flood, geologists flew over the area to assess the risk of landslides triggered by the heavy rain. Floods kill more people each year than any other natural disaster. Over 150 people were saved by search and rescue operations. Very large and powerful floods can even dislodge buildings from their foundations and move them. If a river has a lot of tributaries, the river’s discharge will be much higher because lots of water will be entering it from its tributaries. The size and shape of a river’s drainage basin dictates how much precipitation the river can receive and how quickly it will arrive (the lag time). In this KS2 Geography Flooding Lesson Pack, children consider the consequences of too much water in a given area by looking at the flooding in Boscastle and by carrying out a flood readiness survey in school. This pack includes guides, lesson plan templates, activity sheets and more to teach students about different types of flooding, what causes flooding, and flood … Floods can occur for a variety of reasons, and their effects can be minimized in several different ways. If the floodwater is polluted by sewage, it will contaminate the farmland and make any food grown on it dangerous to eat. Although the dam protects crops and settlements from the annual floods, farmers must now use fertilizers to feed their crops. Nobody was killed thanks to the rescue efforts but some people suffered from broken bones & hypothermia. Boscastle is located in southwest England less than a kilometre from the coastline. being installed in the new buildings. Map modified from this map by Nilfanion/Wikipedia. Scroll down to the section on the hydrological cycle. The point I’m trying to get at is that the recurrence interval isn’t the most useful thing in the world because it’s just an average and averages can (and often do) have anomalies. Flooding is often more severe in areas that have been recently logged. If the basin is circul… The accuracy of the recurrence interval is dependent on the amount of historical data available about previous floods. 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