No one has mentioned the fact that TV is not perfectly flat. Once the local retention pond fills, water will start coming out of low lying street drains, not going into them. The result will be, for example, rain hitting a 100 acre neighborhood will drain onto the lowest 2 acres, then the lowest 4 acres, etc. If we get only 4" of rain, I suspect no one gets a flooded house. A different story with 12". And those with ponds already flooding the trees on the banks, like mine, are at higher risk.
|