River basin digital twin: A tool for modelling adaptation measures for water retention in a landscape affected by climate change
River basin digital twin technology is an advanced tool for assessing the effects of complex adaptation measures on the water balance in the context of ongoing climate change. The integrated, fully distributed, physically based MIKE SHE modelling system forms the basis of the digital twin developed for detailed simulation of the hydrological cycle. Using the Dyje River basin and the pilot upper Svratka catchment as case studies, specific measures to promote natural infiltration and enhance baseflow were tested, designed and quantified. The effects of climate change were assessed using an ensemble of 26 independent climate scenarios based on global climate models (CMIP6) for a 30-year period centred on 2050, compared with the historical reference period 1981–2010.
Drought warning system and local threshold limits
Droughts and floods are extreme hydrological phenomena that are currently increasing in frequency due to the growing impact of climate change, and can have significant effects on our lives. Within the “PERUN” research project, an assessment of drought conditions and their development in the Czech Republic is being developed, along with the innovation of the warning system by the Czech Hydrometeorological Institute (CHMI). Drought is a natural phenomenon characterized by a gradual onset, long duration, and low dynamics, which requires a specific approach. The amendment to the Water Act introduces the obligation of regular reporting on drought and the establishment of a predictive service to be conducted by CHMI. Tools are being developed for long-term prediction of water resource conditions and a methodology for drought and water scarcity management plans. These plans aim to ensure water supply, protect the environment, and minimize the economic impacts. The decision-making body for issuing measures based on the drought plans is the Drought Commission, which operates at the regional level. The warning information is available on the HAMR web portal, which also displays local threshold limits for individual water resources.
HAMR: online drought management system – web presentation to the public
Drought and water shortages are concepts that need to be spaced properly differentiate. Drought is a temporary decrease in water availability and is considered a natural phenomenon. Drought is characterized by its gradual onset, considerable area and long duration.
HAMR: Online drought management system – operational management during a dry episode
Increasing occurrence of drought periods in the Czech Republic has highlighted a necessity of legislation modification. At the same time, a need has emerged for tools supporting decision making and water resources management at various levels during the drought periods.