Answer 8. With the County’s increased amounts of impervious surface, more runoff is produced and consequently travels at higher speeds through our drainage system. This runoff picks up and carries pollutants to the stormwater collection system and eventually leads to receiving waters such as lakes, ponds, rivers and streams. Large volumes of quickly flowing runoff will also erode soil, damage plants, and cause waters to become clouded and murky with sediments. This sediment from erosion can be deposited in slower moving waters. Eventually the deposited soils can fill in streams, ponds, and lake coves increasing the possibility of future flooding over time.