Value adjustment factor and quantity of runoff of water quantity, a station at the point where consideration or pump that is calculated from the relation between the average annual runoff volume and area receive rain water.
And the adjustment factor of runoff as streamflow station agent at the trial or at the pump was calculated from the relationship between average annual runoff and storm water drainage.
And use the factor adjust runoff of the station agent into a runoff that point to consider or area pumping point calculated from the relationship between the annual mean runoff catchment and rain.