International Conference on Rain Water Cistern Systems
USA - June 1982
2: Rainfall Analysis
Deterministic and Probabilistic
Processes of Weekly Rainfall
Ronald H.L. Fong, Edwin T. Murabayashi and Andrew Lo
University of Hawaii at Manoa, USA
In the design of rain water catchment cistern systems, the following design
variables are considered essential:
- Input (weekly rainfall)
- Catchment area (roof-top area)
- Storage capacity (cistern volume)
- Output (withdrawal/use).
Of these, the weekly rainfall is the only design variable that is uncontrollable
and unpredictable. Thus, to design an adequate water catchment cistern system,
the weekly rainfall must be estimated, using available statistical methods from
existing rainfall records. In this paper, the deterministic and probabilistic
processes of weekly rainfall data are discussed and presented for design purposes.
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