Hydraulics, hydrology and hydrogeology

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.

Mathematical estimation of watercourse bathymetry – Bathy_supp software

Topographic data play an important role in the hydrodynamic modelling of flood events. An accurate and precise digital elevation model (DEM) with a bathymetric description of the river channel is often required. DEMs can be derived from various data sources, e.g. ground surveying or remote sensing techniques.

Runoff generation monitoring on the hillslopes of Jizera and Šumava Mountains using tracing experiments for MIPs model

The contribution presents experiments with artificial rainfall and a tracer in the Jizera Mountains which are indispensable for hillslope modelling with MIPs (Multiple Interacting Pathways [1]). Experiments on 2 hillslopes in the Lužická Nisa catchment in the Jizera Mountains and on one hillslope in the Šumava Mountains are described in detail.

Determination of the extent of soil unprotected by vegetation in the period of rainstorms to assess erosion risk

The article describes the method, the source data, and the results of analyses of bare soil by remote sensing and its relation to soil erosion risk. The method was tested on the parcels of AGRA Řisuty, s. r. o. Data from the satellites Landsat 8 and Sentinel 2 were used for detecting the presence of vegetation cover on each parcel.

Assessment of changes of long-term flow characteristics for the period 2001–2015 over the reference period 1961–2000 in selected Slovak gauging stations

The period 2000 to 2015 is a period in which we have observed significant differences and extremes in the hydrological regime of Slovak flows. The Slovak Hydrometeorological Institute, in the framework of its tasks, processes a comprehensive assessment of hydrological characteristics focused on drought assessment.

Water quality and the assessment of anthropogenic pollution of the Elbe River oxbow lake sediments

In this article, water quality and the assessment of anthropogenic pollution in sediments of the middle course of the Elbe River oxbow lakes Kozelská and Vrť were studied. It is widely accepted that the oxbow lakes are extremely significant ecosystems. However, a large amount of contaminated material may deposit in these lakes. The research of lake Kozelská was chosen especially to its proximity to the chemical factory Spolana in Neratovice, which used to be the biggest source of pollution of the Elbe River.

Determination of soil loss from erosion rills by method of digital photogrammetry and method of volumetric quantification

This article presents the first results of the research focused on the recording of rill erosion, and its evaluation using the outputs of the two methods that can be used to determine the soil yield. The consequences of erosion have been documented on a selected pilot site, both as a direct method of volume quantification (using an profile meter – so called soil erosion bridge) and with the use of unmanned aircraft in close-up photogrammetry (UAV).

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.

Catalogue of green water retention measures in the landscape and its application in the web map application

A catalogue of green water retention measures in landscape represents one of the results of long term project financed by the Ministry of Environment. The main goal of the catalogue was to summarize a set of measures with positive effects on water retention of landscape, with low impact on ecological status of water bodies.

Study on the assessment of the effect of nature-friendly measures in the Olešná in Pelhřimov catchment area using the BILAN, HEC-HMS and HYPE models

A catalogue of natural restoration measures was created within several research programs under Ministry of the Environment of the Czech Republic, especially in the program for hydrological draught mitigation. As a next step suitable catchments for their application were identified. With use of hydrological models, the effect of designed restoration measures on three aspects of hydrological regime was assessed.

Effectiveness assessment of the designed measures in the basin

This article describes part of results of the project “QJ1520268 The new procedures of optimization systems integrated protection area in the context of their economic sustainability“. The aim is effectiveness assessment of the designed measures in the Litava basin in hydrological model created in software HEC-HMS (Hydrology Engineering center – Hydrologic modeling system).

How to learn the level of legal and technical principles for the application of blue infrastructure

The Czech Republic does not sufficiently create the necessary conditions for the conceptual approach to urban drainage based on the principles of a sustainable development. The Ministry of Agriculture of the Czech Republic, responsible for the water management, ignores how much a strict implementation of a sustainable drainage system, especially the blue-green infrastructure, could positively impact urbanized areas’ adaptation to climate change.

Information about ORAM

Odra River Alarm Modul (ORAM) will be part of the NAVAROSO project. There are no results of tracer studies of the Czech part of the Odra River in the last twenty years. That´s the reason, why tracer experiment data of the Svitava River were used for analysis.

Response variability of selected hydrological models to typical temporal distributions of short-term precipitation

The article presents a selection of outcomes of a three-years’ project named “Variability of Short-term Precipitation and Runoff in Small Catchments and its Influence on Water Resources Management“. Its aim was to provide to the public the newly derived typical temporal distributions of subdaily precipitation, also known as design rainfalls.

Classification of small watersheds for the rainfall-runoff modelling in the Czech Republic

This article introduces a classification of small watersheds in the Czech Republic in terms of potential hydrological response to a set of design precipitation time series. Watershed classes as well as precipitation time series were derived as a partial result of a three-year project aimed at the design of typical soil conservation measures and small water management structures

Baseflow evolution from the part of Bohemian-Moravian Highlands

This article is focused on evolution of baseflow from part of the Bohemian-Moravian Highlands. This is a topical issue and, given the current situation, is also often discussed. The problem of groundwater and its recharge is an important (not only) hydrogeological problem, as climatic conditions in recent years, especially low precipitation, have a negative impact on groundwater recharge.

Hydrological balance and available water resource in the czech republic during hydrological drought

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.