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A New Approach to Calculate the Water Exploitation Index (WEI+)

1
Department of Civil and Environmental Engineering, University of Perugia, 06123 Perugia, Italy
2
Engineering Department, Niccolò Cusano University, 00166 Roma, Italy
*
Author to whom correspondence should be addressed.
Water 2020, 12(11), 3227; https://doi.org/10.3390/w12113227
Received: 22 September 2020 / Revised: 15 November 2020 / Accepted: 16 November 2020 / Published: 18 November 2020
The Water Exploitation Index (WEI), or withdrawal ratio, is an indicator of water scarcity, which has been updated into its WEI+ form by the Committee of Experts of the European Commission. In calculating the total abstraction of fresh water, this indicator also includes the possible return flow and management rules. The demand for freshwater and long-term freshwater resources are both necessary to calculate the WEI+. These values are not easy to assess at basin or sub-basin level and, for this reason, WEI values are generally calculated at the country level. This paper introduces a new approach to calculate the WEI+, with the purpose of extending its use to basin and sub-basin levels. The methodology is based on flow duration curve estimation, which evaluates freshwater resources, and a Web-GIS system that evaluates water abstractions distribution. This approach allows for the assessment of locally stressed areas in the hydrographic network and could provide a fundamental step toward more comprehensive regional water resources management plans. The new methodology is tested in some sub-basins of the Upper Tiber River Basin (Italy). These results contribute to the analysis of water withdrawals sustainability, based on the policy of the European Environment Agency, which is aimed toward the development of a proactive approach for reducing water stress. View Full-Text
Keywords: water scarcity indices; flow duration curve; water abstractions; Web-GIS; regionalization technique water scarcity indices; flow duration curve; water abstractions; Web-GIS; regionalization technique
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MDPI and ACS Style

Casadei, S.; Peppoloni, F.; Pierleoni, A. A New Approach to Calculate the Water Exploitation Index (WEI+). Water 2020, 12, 3227. https://doi.org/10.3390/w12113227

AMA Style

Casadei S, Peppoloni F, Pierleoni A. A New Approach to Calculate the Water Exploitation Index (WEI+). Water. 2020; 12(11):3227. https://doi.org/10.3390/w12113227

Chicago/Turabian Style

Casadei, Stefano; Peppoloni, Francesco; Pierleoni, Arnaldo. 2020. "A New Approach to Calculate the Water Exploitation Index (WEI+)" Water 12, no. 11: 3227. https://doi.org/10.3390/w12113227

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