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Old 06-03-2013, 03:25 PM   #1
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does yard elevation/topography change over time?


Hey all - I have a backyard that's almost flat. I'm starting to see a few areas where water pools where it never used to.

Could natural conditions occur which change the height of my backyard even by 1/2 inch or so and tip the balance, so to speak?

I use mulching blades on my riding mower, so never remove clippings. Over time, I'm going to assume they rot away and become dirt. Over a few years, that might add an inch or two - and then suddenly the flow of water around my property would change.

Secondly - once pooling of water begins, does it become exponential? What I mean is that water has weight to it. If there is a 15 foot diameter area with an inch of water it in - that weight is pushing down on that very spot, thus making that area even more prone to flooding next time. And the next time, the water is even deeper, so even more weight, etc. etc.

I noticed after a big rain recently there was a chunky strip of grass clippings that must have been pushed ahead of the water. It finally stopped in the middle of the yard, creating a dam about 2 inches high and about 20 feet wide. Water definitely pooled behind it until I broke it down. And now that spot keeps flooding...

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Old 06-04-2013, 01:46 PM   #2
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does yard elevation/topography change over time?


Everything moves.

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Old 06-05-2013, 05:23 PM   #3
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does yard elevation/topography change over time?


Erosion http://en.m.wikipedia.org/wiki/Erosion
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Old 06-06-2013, 08:07 PM   #4
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does yard elevation/topography change over time?


Not just erosion either.

My yard pushes up new rocks ever year. That is why I cut the first couple with the already dulled blades and re-sharpen after that.
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Old 06-07-2013, 12:24 AM   #5
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does yard elevation/topography change over time?


Where are you?

Google Florida sink holes.
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Old 06-07-2013, 11:36 AM   #6
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does yard elevation/topography change over time?


Terrain changes over time from erosion and deposition, that is one reason why you find old artifacts several inches to a few feet below the surface.
The wind and rain tend to erode, walking over the grass tends to compact the soil a little too.
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Old 06-07-2013, 02:54 PM   #7
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does yard elevation/topography change over time?


You should update your profile so we know where you are. If in a climate where ground freezes, soil can freeze and heave over the course of the winter. You can usually fill and landscape roller half full to even out 1/2".

If the half inch is over a large diameter area? There might have been a tree trunk at one time that has decomposed and the soil has settled.

If you have a new landscape, the land may have been scraped to clear it for the developers and then topsoil brought in (or perhaps the old was redistributed) and it has settled.

Or it could just be erosion and other natural forces.
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Old 06-07-2013, 04:51 PM   #8
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does yard elevation/topography change over time?


http://www.youtube.com/watch?v=wbQ4m-NqeF8

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