| Relevance/rationale of the indicator (resp. why the indicator was chosen to measure the target and how it is suitable for these purposes) |
The purpose of this indicator is to show the degree to which water resources are being exploited to meet the country's water demand. It measures a country's pressure on its water resources and therefore the challenge on the sustainability of its water use. It tracks progress in regard to “withdrawals and supply of freshwater to address water scarcity”, i.e. the environmental component of target 6.4. |
| Target value of the indicator and its evaluation |
Evaluation of the indicator according to different levels of stress severity:
no stress <25%
low 25%–50%
medium 50%–75%
high 75%–100%
critical >100% |
| Definition |
The level of water stress: freshwater withdrawal as a proportion of available freshwater resources is the ratio between total freshwater withdrawal by all major sectors and total renewable freshwater resources, after taking into account environmental flow requirements. Main sectors, as defined by ISIC standards, include agriculture; forestry and fishing; manufacturing; electricity industry; and services. This indicator is also known as water withdrawal intensity.
Method of computation: The indicator is computed as the total freshwater withdrawal (TFWW) divided by the difference between the total renewable freshwater resources (TRWR) and the environmental flow requirements (EFR), multiplied by 100. All variables are expressed in km³/year (10⁹ m³/year).
Stress (%) = TFWW / (TRWR - EFR) * 100 |
| Measuring unit |
% |
| Indicator disaggregation |
|
| Reference period (resp. the period to which the indicator relates) |
Year |
| Related geographical area |
CZ (NUTS 0) |
| Comment |
For 2017, updated according to the LTAA from CHMI for the period 1981–2010.
Since 2020 updated according to LTAA from ČHMÚ for the period 1991–2020. |
