Storage is used to reduce the peak discharge
from developed conditions to the
pre-development level . Wet detention can
be used to improve water quality . Detention
for flood protection is best provided on
a regional basis rather than on an individual
site basis . Generally, storage provided in
the upper third of a watershed will reduce
downstream flooding . Storage located in
the lower third of a watershed will generally
increase flooding . Water quality detention
can be provided anywhere in the
watershed that provides capture of the
water quality volume of runoff. Water
quality detention is typically most econom