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re: People are crazy about not buying a properly renovated property
Posted on 8/26/16 at 11:07 am to Nado Jenkins83
Posted on 8/26/16 at 11:07 am to Nado Jenkins83
quote:
f course developments affect drainage.
I know this. You know, sometimes it's affected for the better.
Subdivision drainage was NOT even remotely part of the flooding equation associated with the amounts of rain we received.
Flash flooding places? Sure
But places still underwater a week later should tell you all you need to know about there being just too much water, in a short time, to be removed by our natural waterways.
Posted on 8/26/16 at 11:11 am to the LSUSaint
Ground can absorb rainfall
true but if some of the water that fell upstream had been able to absorb in the ground it could definitely make a difference downstream
quote:
too much water, in a short time, to be removed by our natural waterways
true but if some of the water that fell upstream had been able to absorb in the ground it could definitely make a difference downstream
Posted on 8/26/16 at 11:13 am to the LSUSaint
In undeveloped areas such as forests and grasslands, rainfall and snowmelt collect and are stored on vegetation, in the soil column, or in surface depressions. When this storage capacity is filled, runoff flows slowly through soil as subsurface flow. In contrast, urban areas, where much of the land surface is covered by roads and buildings, have less capacity to store rainfall and snowmelt. Construction of roads and buildings often involves removing vegetation, soil, and depressions from the land surface. The permeable soil is replaced by impermeable surfaces such as roads, roofs, parking lots, and sidewalks that store little water, reduce infiltration of water into the ground, and accelerate runoff to ditches and streams. Even in suburban areas, where lawns and other permeable landscaping may be common, rainfall and snowmelt can saturate thin soils and produce overland flow, which runs off quickly. Dense networks of ditches and culverts in cities reduce the distance that runoff must travel overland or through subsurface flow paths to reach streams and rivers. Once water enters a drainage network, it flows faster than either overland or subsurface flow.
more here
more here
This post was edited on 8/26/16 at 11:15 am
Posted on 8/26/16 at 11:56 am to the LSUSaint
quote:
But places still underwater a week later should tell you all you need to know about there being just too much water, in a short time, to be removed by our natural waterways.
Next time it rains go sit in a giant parking lot and ponder your thoughts on this matter.
Pay special attention to the fact that the surface allows zero peculation down and ALL must run off to elsewhere else, then multiply that by every slab in the watershed drained by your local body of water.
Now that flood water is also unable to be absorbed by the square footage under it.
The fact that water is not absorbed through cement and asphalt is not something that should escape even small children.
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