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Long term dyking of a river that floods twice evry year. #120945 - Ask Extension


Long term dyking of a river that floods twice evry year. #120945

Asked April 10, 2013, 4:50 AM EDT

We are moving in to a place that has a seasonal river that floods twicw a year.Around this time during the heavy rains the area around the river floods. we are looking for the best way to stop this. Is it by building Nertherlands type dykes composed of sand, clay etc or can one use sandbags that stay in place for long? what has been used so far is stone found in the area to build gabions about waist height with wire mesh holding the aproximately foot long stones in place. The water rises to up to ten feet or more when there is heavy rainfall. Will greatly appreciate suggestions. Two years ago, a farm hand was swept away by a sudden rush by the river and died. There are aboutten houses adjacent to the river affected. The lat two years have been particularly bad.Thanks!

Genesee County Outside United States

Expert Response

It seems as though the first best option might be to relocate to a safer distance from the river. However, if you cannot do that, you should confer with local officials to determine whether there are any flood protection projects anticipated. Trying to create an individual dike higher than three feet can be dangerous.

In the United States, we recommend building so that the living area and all the systems are above anticipated flood levels. This recommendation is for a personal protection strategy for anticipated flooding higher than three feet.

We also caution that diking in a flood area can cause harm to others in the immediate area. This publication ( from Louisiana State University may be helpful as you consider your next steps.

Virginia White Replied April 22, 2013, 10:05 AM EDT

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