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.
Update of empirical relationships for calculation of free water surface evaporation based on observation at Hlasivo station
Evaporation from free water surface is one of the essential components of water circulation in nature and significantly affects the overall water balance of the catchment. Due to the complicated direct measurement, it is often calculated from formulas that require available meteorological variables as input data.
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.
The article deals with the assessment of the hydrological balance in a monthly time step in the territory of the Czech Republic, which was divided into 133 sub-basins for the period 1981–2015.
The aim of the study is the regionalization of the Czech Republic with respect to drought characteristics in individual catchments.
In the presented study we tested the selected sets of linear and nonlinear regression models, that describe the relationships between the selected parameters of hydrological model Bilan, which were estimated using the meteorological, hydrological series, and between the retention characteristics estimated using the selected geomorphological patterns of the river basin.
In the Karlovy Vary district, areas with lack of drinking and industrial water were identified. Since 2015, in cooperation of TGM WRI, p. r. i., and state enterprise Povodí Ohře a project called „Increasing water resources availability in selected regions of Karlovy Vary district“ is financed
Bias correction of precipitation and temperature from regional climate models – the impact on runoff modelling
Hydrological modelling is often used for assessment of climate change impacts on water resources. Inputs into the hydrological model are represented by precipitation and temperature based on simulations of climate models.
The BILAN model has been used in a number of research projects and hydrological studies dealing with estimation of water balance for European catchments. This paper is focused on the recent development of the model during last years. The model changes include both core development (new variables representing water use, optional calibration for a system of catchments, saving of state variables) and enhanced user interface that was extended by new graphical outputs and controls allowing interactive use of the model.
Possible compensation of negative climate change impacts using the localities for potential accumulation of surface water
The list of localities potentially suitable for accumulation of surface water (LASW) exists in the Czech Republic from the beginning of 20th century.
The article presents the applied methodology and description of the most important results achieved in the project.