Systems Analysis of Zaragoza Urban Water - SWITCH - Managing ...
Systems Analysis of Zaragoza Urban Water - SWITCH - Managing ...
Systems Analysis of Zaragoza Urban Water - SWITCH - Managing ...
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<strong>Systems</strong> <strong>Analysis</strong> <strong>of</strong> <strong>Zaragoza</strong> UWS<br />
Guillermo Penagos<br />
450<br />
Current 2020 2060 <strong>Zaragoza</strong> in 2060<br />
400<br />
<strong>Water</strong> (million m 3 )<br />
350<br />
300<br />
250<br />
200<br />
150<br />
100<br />
50<br />
0<br />
oct nov dec jan feb mar apr may jun jul aug sep<br />
Month<br />
Figure 24. Current and projected water storage regimes for Yesa reservoir on a hydrologic<br />
year basis under Sc3 scenario. Regimes also include the expected increase in water demand for<br />
agriculture as planned by the National Irrigation Plan (Sc3).<br />
In this analysis total <strong>Zaragoza</strong> requirements are included, even those that are<br />
currently fulfilled from groundwater. The reason is that National Irrigation Plan also<br />
considers the need <strong>of</strong> upgrading current irrigation technologies to minimize loses.<br />
This will reduce the groundwater recharge in <strong>Zaragoza</strong> and the water table might<br />
eventually drop so that it is not that feasible anymore. In such scenario, either the<br />
whole city becomes dependent on tap water or the activities that currently use<br />
groundwater will turn to the Ebro River, whose discharge will be already considerably<br />
reduced by that time.<br />
<strong>Water</strong> quality <strong>of</strong> Yesa reservoir is more difficult to project. However it is possible to<br />
consider TP concentrations as reference point. Current Yesa average TP<br />
concentrations on year basis are 21 ug/l. If current inputs are expected to remain<br />
constant, then by 2020 average TP concentrations might rise to around 40 ug/l and<br />
60 ug/l by 2060. This situation encompassed with increasing temperature and<br />
radiation (due to climate change) would increase the risk for the reservoir to<br />
experience algal blooms, which might negatively affect water supply quality for<br />
<strong>Zaragoza</strong>.<br />
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