Daily project water demand

Implements the guide's demand equation: individual usage times population, plus other uses, plus system losses. All three required demands are computed and compared.

Service population

Households

Average persons per household

How was the population verified?

The guide requires verification beyond authority records: a walk-through count, household interviews, aerial imagery or a formal survey.

Seasonal population shift has been assessed

Individual usage

Full individual usage, litres per person per day

Anticipated collection from this system, litres per person per day

Only water collected from this system counts. Water that users continue taking from other sources stays out of the design demand.

Share of population expected to use the system at commissioning, percent

Basis for the usage figures

Growth and losses

Annual population growth rate, percent

Source of the growth rate

The guide gives no default rate. A rate without a source is rejected.

Planning horizon, years

System water losses, percent

5 to 10 percent is the guide's acceptable benchmark for a sound system.

Project governance

The worst condition (month, irradiance, head) has been defined and agreed

The design demand agreement is documented and signed by all parties