Impact of New Water Sources on the Overall Water Network: An Optimisation Approach

Table 2

Definition of model parameters (par) and variables (var).

Name	Definition	Type
	Index denoting number of water sources	par
	Index denoting type of water source,	par
	Index denoting reservoir	par
	Index denoting time period,	par
	Annualised capital costs of additional capacity (excluding new pipes costs and pumping costs) from sources of type	par
	Existing annualised operating costs of supply costs (operating, maintenance, and environmental costs)	par
	Annualised desalination costs from sources of type	par
	Annualised softening costs from sources of type	par
	Total cost of additional pipes for new water sources of type or investment on pipes cost	par
	Minimum storage capacity of reservoir at period	par
	Water quantity flowing from sources during period to reservoir	par
	Maximum storage capacity of reservoir at period	par
	Additional quantity of water from new sources of type	par
	Unit cost of pipe of size	par
	Pumping cost per cubic meter	par
	The pumping cost of additional water from sources of type	par
	Annualised volume of water demanded in m^3	par
	Quantity of additional pipes required to add new water sources of type	var
	Existing water supply capacity into the water network	var
	Indicate whether additional capacity from sources of type is added to the existing water capacity and it is binary	var
	Indicate whether additional capacity from sources of type added is desalinated and it is binary	var
	Indicate whether additional capacity from sources of type added is softened and it is binary	var