versión On-line ISSN 1816-7950
versión impresa ISSN 0378-4738
Current guidelines for estimating the average annual residential water demand (AADD) in South Africa are based on residential plot size. This paper presents a novel, robust method for estimating suburban water demand as a function of the suburb area. Seventy suburbs, identified as being predominantly residential, were selected for analysis from the largest urban metropolitan area in South Africa. A linear relationship was noted between the total suburb water demand and two land cover areas, namely, the total suburb area and total residential plot area. The average demand for the 70 suburbs based on suburb area was 6.6 kℓ.-d-1.ha-1, with 90% of the values in the range between 4.4 kℓ.d-1.ha-1 and 8.7 kℓ.d-1.ha-1. The average demand was 10.4 kℓ.d-1.ha-1 for calculation based on the residential area. The results are useful when crude estimates of AADD are required for planning new land developments.
Palabras clave : urban water demand; suburb area; residential.