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.
A wetland constructed for the purpose of pollution control and waste management. the substrate to isolate the wastewater form the groundwater. dense cover and an oxygenating substrate for bacteria in the root zone. (retention time; residence time) The average period of time wastewater stays in a treatment system.