In Upper Darby (Delaware County, Pennsylvania, adjacent to Philadelphia), there was
major damage in a flood from a rainstorm a few years back. This flood was part of the
Delaware River Basin. Part of this was due to the freak nature of the rainstorm which dumped 4-5 inches of rain in an hour. However, another component, if I remember correctly, had to do with the fact that the watershed in that area had been completely mismanaged. This caused the State to force the township to comply with the
Watershed Act to fix the issue.
Watershed management and flood planning are very difficult for non-engineers to understand, which is why politicians never seem to have the will to address them until something goes wrong.
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