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DATA IDENTIFICATION


Name
Change in water use efficiency over time.
Indicator purpose
-
Abstract

This indicator addresses specifically the target component “substantially increase water-use efficiency across all sectors”, by measuring the output per unit of water from productive uses of water as well as losses in municipal water use. It does not aim at giving an exhaustive picture of the water utilization in a country.

Data source

National Hydrological Service (NHS)

DATA CHARACTERISTICS



Contact organization person

National Hydrological Service (NHS)

Date last updated
03-OCT-2019
Periodicity

Annually

Unit of measure

km³/year

Other characteristics

This indicator consists in providing information on the efficiency of the economic and social usage of water resources, i.e. value added generated using water in the main sectors of the economy, and distribution network losses. The distribution efficiency of water systems is implicit within the calculations and could be made explicit if needed and where data are available. 

DATA CONCEPTS and CLASSIFICATIONS



Classification used

N/A

Disaggregation

Disaggregated economically and geographically

Key statistical concepts

Water use efficiency is computed as the sum of the three sectors listed above, weighted according to the proportion of water used by each sector over the total use.

Formula
-
OTHER ASPECTS



Recommended uses

This indicator is used to measure the efficiency of the economic and social usage of water resources over time.

Limitations

The corrective coefficient Cr for the agricultural sector is needed to focus the indicator on the irrigated production. This is done to ensure that only runoff water and groundwater (so-called blue water) are considered in computing the indicator; and to eliminate a potential bias of the indicators, which otherwise would tend to decrease if rainfed cropland is converted to irrigated.

Other comments

Please kindly email us for further information at info@mail.sib.org.bz .