A Parameter Classification System for Nonrevenue Water Management in Water Distribution Networks

Table 6

Final selected parameters for NRW management [4, 8, 36–38].

Classification	Parameters	Application area
Physical	(i) Pipe material	Administrative area, DMA
	(ii) Mean pipe diameter
	(iii) Pipe length per number of demand junctions
	(iv) Amount of water supply per number of demand junction
	(v) Deteriorated pipe ratio
Operational	(vi) Number of leaks
	(vii) Leak recovery ratio
	(viii) Demand energy ratio
Socioeconomic	(ix) Water price cost recovery rates	Administrative area
	(x) Investment ratio of maintenance cost to expenditures
	(xi) Investment ratio of facility improvement cost to expenditures
	(xii) Population of water supply per number of demand junctions
	(xiii) Fiscal self-reliance ratio