answers from Chicago on. Very tiny bugs coming up the drain that hop a little are probably springtales...I goggled tiny little bugs that hop when I first encountered them and that's what came up.
Sedimentation basins are stormwater detention systems that promote settling of sediments through the. reduction of flow velocities and temporary detention. Key elements include purpose designed inlet and outlet. structures, settling pond, and high flow, overflow structures. The storage volume consists of two.
These basins are also called dry ponds, holding ponds or dry detention basins if no permanent pool of water exists. Some detention ponds are also wet ponds in that they are designed to permanently retain some volume of water at all times. In its basic form, a detention basin is used to manage water quantity while having a limited effectiveness in protecting water quality, unless it includes a permanent pool feature.