Quote:
Originally Posted by tophcfa
Reconcile this? That pond has been there since approximately the turn of the century. It has never been in its current condition. What gives between now and the last quarter century?
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Quote:
Originally Posted by Aces4
Good question.. soil disruption or chemicals, pollution?
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This is sort of an answer ...
Next time you drive around TV, look at the amount of homes, buildings, pavement, etc. EVERY drop of water that formerly landed on the grass, trees, whatever was there before the pavement, homes, buildings, etc ... now has to be accounted for. It has to be collected, managed, "cleaned" and moved to an acceptable receiver.
What that means, is the natural drainage routes have been modified to meet regulations. The primary goal, is to eliminate/control "flooding". Secondarily, the drainage/water is supposed to be "cleaned".
All the areas that hold water, be they ponds, detention basins, retention basins, etc, all function to "clean" the water. In other words, most of the crap that's collected from the homes, buildings, roads, etc., gets sent to "natural cleansing" basins ... whether created or formerly existing.
The dirt, debris, pollutants, etc don't just disappear into the sky. They go into the ground, they grow trees & weeds, they "fill" ponds and depressions.
The drainage system isn't like a big giant sewerage treatment plant, that artificially cleans sewerage. It's a "natural system" that collects, naturally treats and then disperses most every drop of rain that falls.
(Some amount of drainage is collected and "purified" for re-use.)