Hydrograph Method

Calculate Required Retention/Detention Pond Storage Volume

Volume of in-flow (post development storm) hydrograph

m^3

Volume of out-flow (pre-development storm) hydrograph

m^3

CALCULATERESET

Result

Estimated storage volume

m^3

Vi-Volume of in-flow (post development storm) hydrograph

Vo-Volume of out-flow (pre-development storm) hydrograph

Vs-Estimated storage volume