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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water resources and hydroinformatics : Water scarcity indices vs. water balance: the scheldt river basin
Water scarcity indices vs. water balance: the scheldt river basin
a measurable variable or criterion providing an objective representation of a non measurable process or
quantity, it provides insights in problems and allowing the identification of potential solutions for these problems. However
an indicator is still a simplification of the reality and it gives only general information for a certain space and time scale.
This is also true for drought and water scarcity indices. This study aims to evaluate the performance of traditional drought
and water scarcity indices following a water balance approach which allows to quantify drought related processes in a ore
objective manner. Four relevant indicators are considered: (1) the Standard Precipitation Index (SPI); (2) the Standardized
Streamflow Index (SSI); (3) the Specific Water Availability Index (SWAI) and (4) the Water Exploitation Index (WEI). The
result of the indices are compared with each and with the outcomes of a water balance model. This analysis demonstrated
that (1) both drought indicators SPI and SSI follow the meteorological conditions as expected, but donít express any
additional information on water availability; (2) the SWAI is not suitable as an indicator in regions with high human
activities; (3) the WEI is the most realistic indicator to express water availability in a specific region; (4) water balance
modelling give similar results as the WEI, but it presents more additional information. Water balances allow for a better
identification of the problem and thus for a more effective approach to deal with it.Form Required :
File Size : 120,998 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water resources and hydroinformatics
Date Published : 19/08/2015
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