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The Mississippi floods

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Introduction

The Mississippi floods One of the largest floods n the Mississippi was in the summer of 1993. * The Mississippi River at St. Louis, Missouri, was above flood stage for 144 days between April 1 and September 30, 1993. * Approximately 3 billion cubic meters of water overflowed from the river channel onto the floodplain downstream from St. Louis. * All large Midwestern streams flooded including the Mississippi, Missouri, Kansas, Illinois, Des Moines and Wisconsin rivers. * Seventeen thousand square miles of land were covered by floodwaters in a region covering all or parts of nine states (North Dakota, South Dakota, Nebraska, Kansas, Missouri, Iowa, Wisconsin, Minnesota, and Illinois). ...read more.

Middle

The floods were caused by a weather system coming in from the Gulf of Mexico. This front is shown in this diagram. The Effects of The Floods were: It was excellent for the farmers on the Mississippi flood plain. The floodwater made the soils again rich and fertile. However there were a variety of problems. In the Short term crop production dropped by up to 10%, A Quarter of a million people were left without clean water and 25,000 were actually evacuated. The floods also had economic effects as The river could not be used by Ships, So power stations which used the channel for transporting coal, had to plough into reserve supplies, across Illinois and Iowa isolated building went without power. ...read more.

Conclusion

* There are also high cost schemes such as damming a river. This would hold back a large volume of water, making evaporation easy as well as controlling river flow. * Creating Floodways, which would divert water away from large cities such as St. Louis. * Increase the height of the Levees they already have on the Mississippi or dredge the current Levees to lower the height at which the river flows. This graph shows the amount of water discharged at St Louis, Illinois(located on my map) during the Flood. The average for the year 2000 was 100,000. You can see on this graph that on the 8th it was 1 million! ...read more.

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