BIOL1300 Lecture Notes - Lecture 30: Yu The Great, Waterborne Diseases, Scheldt
29 May 2017
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Coastal regions also at risk ( storm surge problem) Storms can create high water levels ( storm surge ) If the storm surge hits during high tide, the combined water heights can cause significant flooding. This increases the flooding risk in coastal areas, especially those in low-lying delta formations (ex. Case study #1: china, 1931: yellow, yangtze, and huai rivers. Flood-prone area three close, large rivers; flat agricultural land (no escape to higher land) China"s large rivers move sediment from western plateaus to alluvial plains. Over time, sediment deposits formed a large, flat region that is highly fertile, but susceptible to flooding. These 3 rivers are responsible for most of the flooding in china. Usually flood together but flooding of one still has great impacts. They have high discharge and flow through low-lying plains, so people cannot flee easily during flooding. They flood often, and china has constructed river control systems for thousands of years.
