Historical changes in water use in Czech third-order catchments and indications of potential trends based on new regional climate models by the CHMI

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00020699%3A_____%2F25%3AN0000177" target="_blank" >RIV/00020699:_____/25:N0000177 - isvavai.cz</a>

Result on the web

<a href="https://www.vtei.cz/wp-content/uploads/2025/04/6717-VTEI-2-AJ.pdf" target="_blank" >https://www.vtei.cz/wp-content/uploads/2025/04/6717-VTEI-2-AJ.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.46555/VTEI.2025.01.001" target="_blank" >10.46555/VTEI.2025.01.001</a>

Result language

angličtina

Original language name

Historical changes in water use in Czech third-order catchments and indications of potential trends based on new regional climate models by the CHMI

Original language description

The article presents the results of the Czech Hydrometeorological Institute (CHMI) obtained when addressing the sub-objectives "Scenarios of future water needs for different climate scenarios and individual sectors of water use" (DC 1.1) and "Identification of areas with deficient water resources" (DC 1.2), which are part of TA CR project No. SS02030027 "Water systems and water management in the Czech Republic in conditions of climate change (Water Centre)" and constitute specific tasks within the work package WP1 focusing on the future of water. The aim of the CHMI was to calculate and analyse how river flows upstream of gauging stations in Czechia are influenced by water use and to determine how this influence may change in relation to climate change. Mainly, the monthly data of the total discharge influence at gauging stations for the reference period 1991-2020 were analysed. The emphasis was placed on identifying trends in the total influence within individual river basins and localising areas at potential risk of declining water availability and increasing societal demands. For instance, trend slopes were compared across different time periods. Furthermore, an attempt was made to identify areas with deficient water resources based on the SSP2-4.5 and SSP5-8.5 climate scenarios using regional climate models developed at the CHMI. The analysis of the impacts of water withdrawals and climate change on water resources in Czechia revealed significant regional variability. In some regions, such as southern Moravia, northwestern Bohemia, and the Bílina River basin, significant changes in surface and groundwater withdrawals were observed, potentially affecting water availability. Climate scenarios indicate rising air temperatures, with the more pessimistic SSP5-8.5 scenario predicting an increase of up to 5 °C by the end of the century. Regarding precipitation, the SSP2-4.5 scenario suggests a slight increase, while SSP5-8.5 predicts more pronounced changes with higher precipitation totals in the western and southern parts of Czechia. The calculation of the Standardized Precipitation Index (SPI) confirms the occurrence of extreme dry and wet periods, with differences between river basins highlighting the need to tailor water management measures to regional conditions. Adaptation to changes in the hydrological regime, improvement of water resource protection policies, and prevention of the impacts of extreme climatic events must become priorities.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

10501 - Hydrology

Project

<a href="/en/project/SS02030027" target="_blank" >SS02030027: Water systems and water management in the Czech Republic in conditions of climate change</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Vodohospodářské technicko-ekonomické informace

ISSN

0322-8916

e-ISSN

1805-6555

Volume of the periodical

67

Issue of the periodical within the volume

2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

4-11

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-105003838766