The billing data from WAJ are available as quarterly statistics for calendar years. The time-relation between quarters (of the billing table) and months (for the balancing model) is shown in the table below:
Period | year | quarter | month |
---|---|---|---|
1st October to 31st December | n-1 | 1 | 1, 2, 3 |
1st January to 31st March | n | 2 | 4, 5, 6 |
1st April to 30th June | n | 3 | 7, 8, 9 |
1st July to 30th September | n | 4 | 10, 11, 12 |
The module is splitting these figures into monthly values.
By default, an equal distribution is assumed (each month has a rate of 33.33%). However, the user has also the option to adjust the figures for the first 2 months in a quarter. The third month is than given the remainder:
DR(3) = 100-(DR(1)+DR(2))
For each month, the billed volume is then calculated as follows:
MWU_{bm}(i) | = | DR(i) * MWU_{bq }/ (100) |
with |
||
MWU_{bm}(i) | = | Municipal Water Use - billed monthly |
MWU_{bq}(i) | = |
Municipal Water Use - billed quartely |
DR(i) | = | Distribution Rate month i for domestic, commercial enterprise and industrial consumers |