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Could be several things. If your pool walls are sunk into ground instead of setting on the ground, or pool is at base of a slope in the yard, and sand is washing out from under pool floor, it might just be a spot where heavy rains let water flow under pool wall and floor eroding the sand under the liner.
Usually small pin-holes in the liner won't do much if anything to the sand, but if you get a larger hole in the liner, the water leaking out of the pool could also cause erosion of the sand under the liner.
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We live in a flood zone and traditional above ground pools would be washed away Can you build a concrete pool above ground?
You can but you still have to make sure it is fastened to the ground and it is full at times of flood because they can float and can get washed away if they are not anchored to the ground.
How does ground water cause erosion?
Ground water causes erosion because the ground water begins to wear away the materials and soil in the ground.
What is a sink hole?
A sink hole is formed when water flows underground and takes away earth and gravel. This creates a void and the weight of the ground above it causes it to sink into the void that was formed.
How does wind erosion help land?
it causes the wearing away of the soil particles from the ground
Why do the rain gauge stand at about 30cm above the ground?
It stands at 30 cm above ground to prevent water from splashing into it from the ground.
What causes cement to peel away?
Moisture under hairline cracks.
What if your pool is on uneven ground?
If you have an above ground pool and it is on uneven ground then one side will be deeper then the other and the water will be further away from the top edge on side.
Did slaves fight their master?
by running away on the under ground railroad trail
What is sewer?
A sewer is a pipe under the ground for carrying away water and waste.
Are in-ground or above-ground pools better?
Above ground pools are cheaper to install. They offer an easy safety feature which is taking the ladder away while the pool is not in use. In ground pools offer a deeper pool that you can do laps and exercise more freely.
Why did some people survive the hiroshima atomic bomb and others disappered?
The people under 0 ground which was above ground were the bombs exploded, were totally disentrigated. people further away were burned and people further away came out alive but died days after that by intoxication. People further away came out alive that cancer did some deaths among them.
Is it hard to take care of an above ground pool?
No, its not all that hard to maintain an above ground pool you need a pool cover or a solar cover to keep it away from dust, leaves,trash,etc.
