Essay #4 What is flooding? Flooding is when a place or area is covered or submerged with water. There are many things that cause flooding. That includes heavy rainfall‚ which can cause rivers to overflow and devastate a whole community. Another culprit to flooding is hard dry soil. When the soil has not been replenished in a long period of time‚ it cannot absorb the downpour rapidly enough. Building on flood plains is also a growing concern. Floodplains are flat areas of land with higher
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cross-section; the result‚ after sea-level rise‚ is a fjord with deeper basin than the sill Classical coastal plain estuaries (drowned river valley) – V-shaped cross-section; shallow: 20m or less; broad flat areas along the sides with marshes; very large in surface area 25 km x 25 km (Delaware Bay) Coastal plain salt-marsh estuary – from NC to Florida on east coast‚ few major river estuaries. Salt marshes from along low-lying coastal areas; well-defined tidal drainage network (dendritic); formed in a manner
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Streams and Rivers: The most prominent physical characteristic of streams and rivers is their current. Headwater streams are generally cold‚ clear‚ turbulent‚ and swift. Streams and rivers are stratified into vertical zones. The salt and nutrient content of streams and rivers increases from the headwaters to the mouth. Damming and flood control impair the natural functioning of stream and river ecosystems and threaten migratory species such as salmon. Estuaries: is a transition area between river and sea
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Mrs. Wang’s clan village‚ the Village of Three Mile Wangs‚ on the flat banks of the Yellow River‚ had never even seen a Japanese person. Only the war caused them to talk about the Japanese. It was an early summer evening. After her supper‚ Mrs. Wang had climbed the dike steps‚ as she did daily‚ to see how high the river had risen. She was more afraid of the river than of the Japanese. She knew what the river could do. One by one‚ the villagers had followed her up the dike. They stood staring down
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Streams and rivers * WetlandsPonds and lakes These regions range in size from just a few square meters to thousands of square kilometers. Scattered throughout the earth‚ several are remnants from the Pleistocene glaciation. Many ponds are seasonal‚ lasting just a couple of months (such as sessile pools) while lakes may exist for hundreds of years or more. Ponds and lakes may have limited species diversity since they are often isolated from one another and from other water sources like rivers and oceans
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Being a great fan of Dr.A.P.J. Abdul Kalam I’ve always been inspired by him. I’m one of those lucky ones who had the golden opportunity to meet him in person when I was in 9th grade. I was ignited by his thoughts and views and I thought Vision 2020 was the best action plan we could have for our beloved country- INDIA. But then today while I was writing this post my Dad happened to have a look at what I was up to. He asked me what my vision for India was. I said all the great things that I had read
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around on the streets‚ one thing people always notice is trash and polluted rivers. People throw things carelessly‚ which can block the canals and rivers‚ making them polluted and hard to maintain. Another part is the amount of weight we produce; cars‚ buildings adds on to the weight in which can cause the land to sink. For the past two decades‚ the environment and population density have changed. Over time‚ the quality of river catchment is decreasing due to the lack of responsibility in disposing waste
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many parts of the river basin‚ e.g. Nepal‚ Bhutan and Northern India. This is a result of population growth (more wood is needed for cooking and heating. Also more forests are cleared for farm land). This has led to increased flooding. This is a result of: * More erosion of soil as roots no longer hold soil together * Less take-up of water by plant roots * Less interception of rain fall by vegetation cover Positive impact of flooding in Ganges/Brahmaputra river basin Regular annual
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Section A - Restless Earth The earth’s structure At the centre of the earth is the core. Surrounding that is a mass of molten rock called the mantle. The thin layer on the outside is called the crust. There are two types of crust‚ continental and oceanic. The crust is made up of seven major plates and many smaller ones. The plates move due to convection currents rising in the mantle. Distribution of earthquakes and volcanoes Mainly found along plate boundaries. In
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1. Describe three factors that control how much water is flowing in a river. The rate of precipitation‚ the source of water (snow on mountains)‚ and slope of the river. 2. List the factors that produced the different flow conditions. Rillito Creek‚ Arizona- An increase in precipitation. Mississippi and Wisconsin Rivers- result of global climate change. Colorado River‚ Glen Canyon Dam- an increase in precipitation. 3. What do the spikes in the graph indicate? A big increase in the measured
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