Systems Analysis of Zaragoza Urban Water - SWITCH - Managing ...

Systems Analysis of Zaragoza UWS
Guillermo Penagos
Other aspects of environmental urban water sustainability are not expressed as goals
for the water system. However Zaragoza city signed the Aalborg summit for
sustainable European cities. The goals of Zaragoza sustainability vision that apply to
the UWS and a list of suggested actions to achieve each goal are shown in table 5.
Table 5. Goals of the Aalborg summit that apply to the UWS of Zaragoza
Goal
Necessary actions to achieve the goal
1 To reduce water withdrawal Water recycling, infrastructureupgrading (on going
action), demand management (demo activity within
the SWITCH project)
2 To reduce unaccounted water Infrastructure upgrading, demand management
3 To improve water supply quality Shifting to a different raw water source (on going
action), shifting to a different DWT technology
4 To contribute to improve the
ecological Status of the Ebro River
5 To reduce dependence on fossil
fuels
To reduce pollution loads to the River
Shifting to renewable energy sources (depends on
National Government Policies)
6 To reduce the ecological footprint To reduce resource consumption
7 To reduce the production of solid
waste
To reduce sludge production
4.4.2 Focus problem and drivers affecting Zaragoza sustainability vision
The tree problem methodology is used here to define the goal of environmental
sustainability as the focus problem of Zaragoza UWS. Several drivers that might
affect the environmental performance of such system are shown in figure 18.
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