Estimating night use is a vital part of leakage estimation and effective targeting of leakage detection resources. Considerable effort has been put into determining specific domestic night use allowances. This includes the method of analysing District Meter Area (DMA) data embodied in the SMART™ application. However, estimating commercial night use, especially for individual DMAs, remains a problem with estimates based on a random sample of meter reads or logs. With night use varying wildly from customer to customer, from night to night and throughout the year, the result is estimates with inevitably large errors, especially at DMA level.
Three water utilities supported this project, which aimed to avoid these problems by analysing DMA flow data using a number of SMART™ concepts to produce specific daily estimates of night use at DMA level, consistent with the night flows analysis method used by the Utilities.
- Improved targeting of leakage control resources improving active leakage control efficiency
- More robust commercial night allowances used in leakage reporting
- Reduced cost from logging many individual customers.