c) Stormwater detention ponds are intended to serve both to attenuate flood flows by providing temporary water storage and to improve stormwater quality by removing sediment. Local guidelines recommend that stormwater detention ponds provide an average of 24 hours detention time and should be between 1 and 4 meters deep. i. Show that the terminal velocity of a single particle with drag force ( FD) and weight (W) can be expressed by the following expression: vS=18g(pW)dp2 v5= terminal velocity of particle (m/s) g= gravitational constant (9.8m/s2) p= the density of the particle w= density of water (1000kg/m3) dp= particle diameter = viscosity of water (1103kg/(m.s)) HINT: SEE FORMULA SHEET FOR FORMULAS AND ASSUME TVPE I (5) SET ILING APPLIES