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.
Detention basin. A detention basin or retarding basin is an excavated area installed on, or adjacent to, tributaries of rivers, streams, lakes or bays to protect against flooding and, in some cases, downstream erosion by storing water for a limited period of time.
Detention basins usually hold a permanent pond of water, and are sometimes called wet basins.. Similarly, a retention basin is a depression that also collects and slowly releases stormwater from large drainage areas. However, a retention basin is different because it is not permanently covered with standing water.