Changes

Jump to navigation Jump to search
Line 22: Line 22:
*''P<sub>d</sub>'' &#61; The daily demand per person (L)
*''P<sub>d</sub>'' &#61; The daily demand per person (L)
*''n'' &#61; The number of occupants}}
*''n'' &#61; The number of occupants}}


Then the following calculations are based upon two criteria:
Then the following calculations are based upon two criteria:
Line 27: Line 28:
#The average annual demand (D) is greater than the average annual yield (Y) from the catchment.  
#The average annual demand (D) is greater than the average annual yield (Y) from the catchment.  


*When \(0.33<Y_{0.05}/D_{0.05}<0.7\), the storage volume required can be estimated:
When \(0.33<Y_{0.05}/D_{0.05}<0.7\), the storage volume required can be estimated:
<math>V_{S} = A \times C_{vol,E}\times R_{d} \times e</math>
<math>V_{S} = A \times C_{vol,E}\times R_{d} \times e</math>
Where:
Where:
Line 37: Line 38:
*''e'' &#61; The efficiency of the pre-storage filter.}}
*''e'' &#61; The efficiency of the pre-storage filter.}}


*Careful catchment selection means that the runoff coefficient, for a rainstorm event (C<sub>vol, E</sub>) should be 0.9 or greater.
|*Careful catchment selection means that the runoff coefficient, for a rainstorm event (C<sub>vol, E</sub>) should be 0.9 or greater.
          
          
When 0.33 < Y<sub>0.05</sub>/ D<sub>0.05</sub>< 0.7, the total storage required can be estimated by adding Y<sub>0.05</sub>:
When 0.33 < Y<sub>0.05</sub>/ D<sub>0.05</sub>< 0.7, the total storage required can be estimated by adding Y<sub>0.05</sub>:

Navigation menu