The intense winds of tropical storms can destroy whole communities, buildings and communication networks. cyclone - causes, effects, prediction and precaution. Reduces chance of downstream flooding for 15 million people. This Environment Agency document provides an overview of reasons for flooding in December 2015 on pages 6 and 7. ppt, 2.93 MB. This leads to more
doc, 2.32 MB. The concreting and tarmacking of urban areas. This is the Coasts section of the module which is taught alongside Earthquakes & Volcanoes, Rivers, Weather and Climate & Natural Vegetation. Tides are the regular rise and fall of the ocean due to the gravitational attraction of the moon and the sun on the Earth. Bays - Lulworth Cove, South Coast, England. Increased pollution levels in the river may lead to an increase of pollution in the flooded soils Seasonal pools either side of the river are flooded and the water refreshed after the drier periods 5. The tidal coefficient was 94 (very high). 11 part lesson series for the Cambridge IGCSE module The Natural Environment. The land can no longer absorb water as it is saturated increasing surface run-off, higher river discharge and flooding. Storm surges are sudden rises in sea level caused by very strong winds, normally those found in hurricanes and cyclones. A lesson aimed at year 7 of different abilities. Everything on the site, other than the resources for IB DP Geography, is free to access. To flooding, strong and massive winds drive water onto the dry coastal lands and cause floods and the situation is even more dangerous when the winds blowing from the oceans carry rains in them or when the tsunami carries sea waters which causes too much damage to any area. Lakes and coastal flooding are the causes of flooding. Case study: Cyclone Nargis. Managing erosion by working with natural processes to help restore beaches and coastal ecosystems. Edexcel IGCSE Geography - Hazardous Environments 26 terms. 20 a) Physical factors that help cause flooding are: abnormal periods of intense or prolonged rainfall impermeable rocks steep slopes and rapid runoff high drainage density short lag time sparse vegetation cover. This forces new magma up and out of the chamber in a volcanic eruption. Increasing building development on the flood plain i.e. [4] houses and light industry. IGCSE Geography: Marine Processes - Our comprehensive and downloadable study notes on Marine Processes - Read more! Some effects are shown on pages 10 and 11. However, with the presence of Deforestation which increases the amount of surface runoff. Using a case study, pupils make the link between this climatic hazard and coastal flooding and research and write a newspaper The New Wider World Pages 216 - 217. hydraulic action. [3] (iv) Suggest reasons why many coastal lowland areas, such as the area shown in Fig. Silt and sand deposition which reduces river depth and width. File previews. causes the old bend to be cut off, forming an oxbow lake. Stacks - Old Man of Hoy, Scotland. sudden downpours occurring following a very dry period can lead to flooding because the surface is baked hard. Dam Breakage: More tourism. What coastal landforms do these images show? Mitigation. Many tertiary sector/service jobs will be created. At a simple level, the floods were caused by an intense period of rain caused by a low pressure system. By the heavy rains the river gets to change its way and the result the areas, 1.3 (Insert), have a high population density. Melting of ice especially exacerbated by global warming. As storms approach a coastline, The Hydrological Cycle. DNWebb. Exercises 3 and 4 Page pdf, 98.79 KB. Once the water reaches the ground, one of two processes may occur; 1) some of the water may evaporate back into the atmosphere or 2) the water may penetrate the surface and become groundwater . Low lying areas especially along coastal areas where Tsunamis and tidal wave flooding can occur. Causes of Coastal Flooding Coastal flooding results from a number of factors: Storm surges - a rapid rise in sea level caused by really Storm surges - a rapid rise in sea level caused by really low-pressure storms (e.g. Due to heavy rain, rivers and lakes may get overflow and causes the floods. Channel straightening involves straightening the course of a river. Soft engineering. The lesson is planned around the Geography Nelson Thorne's Foundation textbook. Flooded floodplain + No People = No Problem There are two main reasons that flooding has increased: 1. Causes of flooding in Bangladesh. Tides. Larger ships can navigate river therefore there are more ports + trade. b) Deforestation and urbanisation can also cause flooding. Another cause unrelated to plate tectonics is a decrease in the external pressure acting on the magma chamber. Start studying IGCSE Physical Geography. Causes of Flooding. the power of The range of a coastal flooding is a result of the elevation of floodwater that penetrates the inland which is controlled by the topography of the coastal land exposed to flooding. Deforestation shortens the lag time The strong winds essentially push the water on an oceans surface on top of more water, increasing the sea level and flooding coastlines.
The key factor is the time taken for the precipitation to reach the river from where it falls - the lag time. Deforestation can increase the risk of flooding. 2 Coastal environments (a) Study Figure 2 which shows options for the management of a stretch of retreating coastline. Method Cost per metre Hard engineering methods Rock armour 1250 plus 10 per year maintenance Sea wall 3000 plus 120 per year maintenance Soft engineering methods Beach replenishment 80 plus 50 per year maintenance 9. The conditions needed to create these strong winds are generally associated with low pressures, Specifically designed for the new IGCSE. Prolonged rainfall Soil becomes saturated after prolonged rainfall. 1.2 have a low population density. Which of these is not a way trees, vegetation and forests decrease the chances of flooding? 2. By helping to prevent coastal erosion, flooding, and loss of property on the shore, the reefs save many of lives and lots of money each year. There are a range of physical factors that can lead to flooding. Causes of flooding Prolonged rainfall - if it rains for a long time, the land around a river can become saturated (it's holding as much water or moisture as can be absorbed). Complete the worksheet by clicking on the tab beneath. China will prosper; government will like it as it Wave Cut Platforms - Robin Hood's Bay, Yorkshire, England. Moisture is transported around the globe until it returns to the surface as precipitation. In GCSE Geography students will look at rivers. One aspect of this topic is flooding. This is one of two quizzes on flooding and it focusses in particular on the causes and the effects of floods. Floods can have devastating effects. A warm front from the Atlantic and a colder one drawn from north of Scotland meeting. Unfortunately, where the relief channels re-join river s, there will be increased river discharge and this could cause flooding there. Sea Caves - Sea Caves on the coast of Anglesey Arches - Green Bridge of Wales, Pembroke, Wales. Watch both videos below. 1.2 (Insert). The management of coastal flooding. Because of the heavy rains, the low is mainly get affected fast and the result they get flooded. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Coastal flooding normally occurs when dry and low-lying land is submerged by seawater. 5 February 6 By building on and using flood plains and so clearly increasing the chances of being flooded; by deforestation which speeds up runoff; by failing to undertake proper flood protection measures. It is a flashy river system. Economical Successes. Causes of hazards including flooding and river erosion Opportunities of living on a flood plain, a delta or near a river Explain what can be done to manage the impacts of river flooding: Case study required in 2.2 The opportunities presented by a river, the hazards associated with it and their management Topic: Candidates should be able to: http://imstuck.wix.com/imstuckgcserevisionCauses of Flooding - How Are Floods Caused? A combination of factors led to the storm surge that was responsible for flooding. Channel Straightening. Flood damage modelling was limited to local, regional or national scales. All lesson are for 50 minutes to 1 hour of teaching time. Causes of coastal erosion. This means that things like This leads to an increase in surface run-off as rainfall can no longer infiltrate the soil. Cliffs - Beachy Head, South Coast, England. To flooding, strong and massive winds drive water onto the dry coastal lands and cause floods and the situation is even more dangerous when the winds blowing from the oceans carry rains in them or when the tsunami carries sea waters which causes too much damage to any area. tropical storm) Storm tides - Headlands - Worms Head, Sometimes the most destructive elements of a storm are the subsequent high seas and flooding. A natural event (for example earthquake, flood, landslide, volcanic eruption) that threatens or causes damage, destruction and death. Explain why areas like those shown in Fig. A decrease in temperature can cause old magma to crystallize and sink to the bottom of a magma chamber. The water flows over the banks and onto the surrounding area. Dumping persistent rain. All about geographyalltheway.com. On Thursday 5th December 2013 large areas of the east coast of England were affected by coastal flooding on a scale not seen since the Great floods of 1953. A combination of factors led to the storm surge that was responsible for flooding. docx, 210.23 KB. 3 UCLES 2021 0460/11/M/J/21 [Turn over (iii) Many parts of Saudi Arabia are hot deserts, as shown in Fig. Increased water flow resulting from many tributaries.
Flooding occurs when the capacity of the river channel is exceeded. Surface run-off occurs as water cannot infiltrate leading to higher river discharge and flooding. High tides (coastal flooding) Draining of peat bogs & new drainage systems for intensive agriculture had decreased soil storage & increased run off Urbanisation - building on flood plains before strategic land use planning. As well as their own destructive energy, the winds generate abnormally high waves and tidal surges. Causes: The yo-yo pattern is the result of two weather systems. Although some areas have experienced gusts of up to 70mph, the reluctance of the dismal weather to move off north and east is also due to a weaker jetstream than usual. Almost instant response to a rainfall event, with a small lag time.
What causes coastal flooding. Coastal floods are caused by extreme sea levels, which arise as combinations of four main factors: waves, astronomical tides, storm surges and relative mean sea level. geographyalltheway.com is a continually evolving repository of geography teaching resources. Flooding is usually the result of heavy or prolonged rainfall. Lakes and coastal flooding are the causes of flooding. This included a high spring tide, an area of low pressure and high northerly winds. the use of concrete and large artificial structures by civil engineers to defend land against natural erosion processes. 2.