Pros and Cons of Levees
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GCSE Rivers Revision - The Lower Course (Diagram) This diagram shows how levees prevent water from overflowing.

GCSE Rivers Revision - The Lower Course (Diagram) This diagram shows how levees prevent water from overflowing. | Pros and Cons of Levees | Scoop.it
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Levees

Levees | Pros and Cons of Levees | Scoop.it

Wondering what a levee is? Levees are embankments or small borders designed to keep rivers from overflowing. They are used in many places all over the world. Levees are very common in locations that are recovering or trying to prevent further damage from a hurricane. Although levees have proven to be beneficial, many researchers suggest that a lot of current levees are full of flaws.

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A City's Faulty Armor - National Geographic Magazine

A City's Faulty Armor - National Geographic Magazine | Pros and Cons of Levees | Scoop.it

Hurricane Katrina left the city of New Orleans devastated and crippled after the storm passed. Residents of New Orleans currently rely on all of the new levees built to protect them from a storm like Hurricane Katrina. Although levees are proven to be beneficial, there has been increasing speculation on whether or not the levees will really help. Multiple sources repeatedly warn citizens and observers that the levees that are currently in New Orleans have various flaws and will not keep the town protected from another hurricane. Although many citizens are under the illusion that they are completely safe, others know that there is a big risk but refuse to leave the place that they call home.

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Levees and the illusion of flood control | Highly Allochthonous

Writer Anne Jefferson writes about her hometown of Winona and the destruction brought on by the Mississippi River. Jefferson explains how there were many annual spring floods that caused damage to the city. Although the citizens used sandbags and dikes, building a levee seemed to be the most beneficial solution. Although Jefferson explains that levees don't always fully prevent flooding, they are a great way to eliminate most of it.

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Missouri Army National Guardsmen monitor the emergency efforts of this levee.

Missouri Army National Guardsmen monitor the emergency efforts of this levee. | Pros and Cons of Levees | Scoop.it
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My Scoop on Levees Basics

My Scoop on Levees Basics | Pros and Cons of Levees | Scoop.it

Near riverbanks nationwide, the government has built great lengths of levees around the country. The purpose of these levees is to monitor, regulate, and try to direct the flow of water elsewhere.  This protects against flooding for a short time. Although they don't wipe out the risk of flooding, levees can save lives and infrastructure. Because most levees are locally owned, the US Army Corps of Engineers helps establish a criteria so the levees are safe.

 

The structure is placed parallel to the water to act as a barrier between a city and the body of water. Levees, also known as floodbanks, can be composed of either earthenware or sandbags. Most levees are composed of soil covered with a harder surface. Engineers from the US Army Corps of Engineers planned this to reduce risk for erosion. The composition of the levee depends on time. In other words, if there's an emergency, the government uses sandbangs to hastily push last-minute efforts. From time to time, levees can form naturally, and more commonly in rivers that are low in elevation or creeks.

 

Unfortunately, levees can fail. Because levees don't work perfectly, FEMA(Federal Emergency Management Agency) generally deals with identifying risks. They advocate to inform people on the possible dangers of levees when they fail. Some examples of ways levees can fail include overtopping, breaching, and seepage. Although they don't prevent flood perfectly, they decrease the risk, which gives people a deductable on flood insurance. 

 

 

 

http://www.floodsmart.gov/floodsmart/pages/flooding_flood_risks/levees.jsp

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Photo: New Orleans' Rebuilt Levees "Riddled With Flaws"

Photo: New Orleans' Rebuilt Levees "Riddled With Flaws" | Pros and Cons of Levees | Scoop.it

Two young children play near one of the main levees in New Orleans. The levees are said to be somewhat flawed as water goes through some cracks onto the ground probably from a broken water main. In the case of a major hurricane, many of the current levees would not withold all of the water.

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LUCE SEMESTER 2009: FROM THE BAY TO THE BAYOU » Blog Archive » Day 16 – November 18

LUCE SEMESTER 2009: FROM THE BAY TO THE BAYOU » Blog Archive » Day 16 – November 18 | Pros and Cons of Levees | Scoop.it

The levee system in New Orleans, the sea level is much higher than the houses.

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