In order to understand the impact of climate on renewable water resources it is worth analysing the changes together with alterations in the hydrological basis (long-term averages of the total runoff, spring rate or the recharge).

Data from the climate models RegCM3, Aladin and Promes were used as input data for WR modelling on most test areas. Both for long-term average conditions and characteristic renewable water resources the change (in %) between results for the period 2021-2050 and the baseline 1961-1990 had to be calculated.

Vulnerability of water supply depends on the water exploitation level and available water resources. To analyse the risk in test areas the water exploitation index (WEI) was selected. WEI is the ratio of the water demand (WD) and available water resources (WR): WEI = WD / WR.

Four different combinations of water demand scenarios and renewable water resources were considered:

  • Baseline: WEI = WD0 / WR1961 – 1990;  WD0: present water demand,
  • Scenario 1: WEI1 = WD0 / WR2021 – 2050; WD0: present water demand,
  • Sceanrio 2: WEI2 = WD1 / WR2021 – 2050; WD1: future water demand 1 (present water demand increased by 25%),
  • Scenario 3: WEI3 = WD2 / WR2021 – 2050;  WD2: future water demand 2 (present water demand decreased by 25%).

Report can be found here:
Common methodology for determination of water availability on Adriatic area & Annexes

Use the interactive chart for visualization of calculated parameters. Hover a mouse over test area to preview detailed information.