1. Water Exploitation Index (WEI) & Water Exploitation Index plus (WEI+)
ESTP Water Statistics Paris 2018
Arnulf Schönbauer
THE CONTRACTOR IS ACTING UNDER A FRAMEWORK CONTRACT CONCLUDED WITH THE COMMISSION

2. Water Exploitation Index
Key messages:
Total water abstraction has decreased over the last decade in most regions of Europe with the exception of western southern Europe where it has been constant.
18 % of Europe's population live in countries that are water stressed.

3. Water Exploitation Index
The water exploitation index (WEI), or withdrawal ratio, in a country is defined as the annual total abstraction of fresh water divided by the long-term average freshwater resources.

4. Water Exploitation Index

5. Water Exploitation Index +
WEI+ compares water consumption with renewable water resources in a given spatial and temporal unit: 𝑾𝑬𝑰+ = (𝑨𝒃𝒔𝒕𝒓𝒂𝒄𝒕𝒊𝒐𝒏𝒔−𝑹𝒆𝒕𝒖𝒓𝒏𝒔) 𝑹𝒆𝒏𝒆𝒘𝒂𝒃𝒍𝒆 𝑾𝒂𝒕𝒆𝒓 𝑹𝒆𝒔𝒐𝒖𝒓𝒄𝒆𝒔

6. Water Exploitation Index +
𝑹𝑾𝑹 𝟏 =𝑬𝒙𝑰𝒏+𝑷−𝑬𝑻𝒂− 𝜟𝑺 𝒏𝒂𝒕
𝑹𝑾𝑹 𝟐 =𝑶𝒖𝒕𝒇𝒍𝒐𝒘+ 𝑨𝒃𝒔𝒕𝒓𝒂𝒄𝒕𝒊𝒐𝒏𝒔−𝑹𝒆𝒕𝒖𝒓𝒏𝒔 − 𝜟𝑺 𝒂𝒓𝒕
Where: ExIn: External Inflow P: Precipitation ETa: Actual evapotranspiration ΔS: Change in storage (either natural or artificial)

7. JQ-IW as data source Total renewable freshwater resources (table 1)
feshwater abstraction (table 2)
losses (table 3)

8. Water Exploitation Index +
References
EEA Report: European Water Assets Accounts and updating the use of freshwater resources indicator (CSI 018)