Flooding and retaining wall in pond?

| May 9, 2014 | 2 Comments

Question by cam: Flooding and retaining wall in pond?
The area I plan to put my pond has flood issues during monsoon season. I an on putting in edging to help keep the water out of the pond. Would I also need to instal a retaining wall?
Thank you.

Best answer:

Answer by emmann3354
Find out the historic flood level where you live and build a wall higher. Don’t invest in expensive fish.

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  1. Marduk says:

    I’m thinking that you put down 40 year treated 8″ x 8″ timbers around edges of proposed pond and drape pond lining over it which would make it 8″ higher than surrounding land. You don’t say what the level can be but I think that would help a lot. You can secure the timbers with reinforcing rods so the water cannot overcome the timbers. I might think of digging a ditch around part of pond rather than wall. You could lay drainage hose from area of flooding away from the pond to some lower area. Brute force does not win against water but good planning does. I think that a drainage system which uses the force of water to divert it is better than trying to keep it away.

  2. mindshift says:

    It is very important to prevent runoff entering a pond. The smaller the pond the more important this is. Dirt and debris will settle in the pond, and you will need to clean the pond bottom more often. Worse, any fertilizer runoff from the lawn or garden will cause algal growth. Every pond should have edging. Adding a retaining wall suggests more than a slight slope.

    My pond has a similar problem. I put it in a low spot that did not flood at the time. After a house went up next door, the added runoff cause this area to flood. I had to dig a dry well with a grate over the top (like those in commercial parking lots) with a drain pipe to take the extra water to a wet-weather creek towards the back of our property. There is a slight grass-covered berm between the dry well and the pond edge.

    Alternatively, you can try creating another low area, placing some of the soil as a berm between the pond and the runoff source. Fill the new low spot with bog or water-meadow plants that will appreciate the runoff and extra nutrients. Water meadow plants are more tolerant of dry seasons.

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