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Why Dredging Is Not a Universal Solution to Flooding In South Sudan

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WHY DREDGING IS NOT A UNIVERSAL SOLUTION TO FLOODING IN SOUTH SUDAN.

What is DREDGING?

Dredging is the act of removing silt and other material from the bottom of bodies of water. As sand and silt washes downstream, sedimentation gradually fill channels and harbors , therefore the material must be removed by dredging.

Is DREDGING a good solution to South Sudan rivers and sudd wetlands to prevent flooding?

No, it’s not a universal solution to flooding. Numerous studies dated back to 1980’s have shown that dredging can speed up flow and potentially can increase risk of flooding downstream and have devastating unintended consequences for wildlife and people’s homes and businesses.

Dredging does not prevent future flooding issues and can be detrimental to upstream and downstream landowners therefore, dredging of a stream or waterway should not be undertaken lightly.

While dredging can improve general land drainage, it cannot prevent rivers from flooding due to the hug volumes of water involved. In some cases, dredging can even make flooding worst.

Dredging and desilting can have serious and longlasting negative impacts on the environment. Good example is, it can damage or destroy fish spawning groups and make the river banks unstable. Silt can become suspended by the water,lowering oxygen levels,potential releasing harmful chemicals that may be present.

Removing large parts of the seabed and damping it elsewhere can have a major impact on the ecosystem , particularly sensitive areas such as coral reefs and fish nurseries.

The dredging of contaminated materials will cause the harmful particles to regroup and spread to a larger in the water body.

Of course dredging never destroys a river but is a necessary activity that is required to increase the depth of rivers and remove the unwanted deposits for safe passage of boats and ships but its nature can change the environment.

We must stop DREDGING!!!

by Robert Yak.

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