Informatics, cartography in water management

Automatic watershed delineation in the Czech Republic using ArcGIS Pro

Manual watershed delineation by watershed divides has traditionally been performed by means of an analysis of topographic maps and contour lines. With the availability of digital elevation models, watershed and streams delineation is performed automatically, which reduces the time spent on manual delineation. In this study, we introduce the process of automatic delineation and the models available within the toolbox Arc Hydro Tool Pro, created by the company ESRI for the ArcGIS Pro software. Automatic delineation was implemented by means of different methods for selected watersheds in the Czech Republic, varying in area and elevation.

Zero isochion in the framework of geomorphological regions in Czechia: its extraction from the MODIS imagery and its dynamics

Since December 2012, during every winter season, the altitude of the zero isochion (snowline) has been determined at the Czech Hydrometeorological Institute for the purposes of operational hydrology. The reason is the estimation of the amount of water stored in snow cover, which is inevitable activity for Czech hydrologists who naturally want their forecasting models to give relevant results. In order to get a better idea about current spatial distribution of snow cover in Czechia, the information on the zero isochion has been extracted from the MODIS imagery coming from the Terra satellite.

Practical examples of using GIS in hydrology at the Czech Hydrometeorological Institute

GIS technologies are widely used in the Hydrology Department of the Czech Hydrometeorological Institute (CHMI). The processing of geospatial data, which are used in hydrology for analytical tasks, and the development of GIS technologies in the last two decades have contributed to the spread of GIS in the CHMI practice. The use of GIS tools is shown in four examples. The first one focuses on the creation of GIS data. The second example concerns the preparation of input source data for the derivation of the hydrological characteristics of M-day discharge, which, according to Czech Standard 75 1400 Surface water hydrological data, are among the basic hydrological data. The third example describes the use of GIS in the preparation of hydrological assessments according to the above-mentioned standard (75 1400), which usually result in M-day or N-year-flood discharges in a specified profile of a certain watercourse. The fourth example focuses on the use of GIS in operational hydrological service, specifically in the development of the Flash Flood Indicator, which determines the level of risk of flash flood formation or occurrence based on current land saturation and radar rainfall estimates.

IAHS International Commission on Remote Sensing

The International Commission on Remote Sensing (ICRS), as one of the current ten scientific commissions under the umbrella of the International Association of Hydrological Sciences (IAHS; [1]), has emerged as a logical response to the availability of spatial data associated with the launch of the first satellites in the 1970s that were designed to observe the Earth’s landscape sphere from space, providing a completely new perspective in which the spatial extent of the territory under observation played the major role.

GIS and cartography at the T. G. Masaryk Water Research Institute

Geographic information systems (GIS), data processing, evaluation and interpretation are an essential and integral part of research at present as most information can be related to a specific location on the Earth’s surface. The GIS and Cartography Department at the T. G. Masaryk Water Research Institute deals with research and commercial projects by means of the application of GIS tools.

Problematics of archive map data interpretation, specifically the wetland habitats

The article presents available on-line archive maps from the websites of the Archive of the Surveying Office and the Geoinformatics Laboratory of the J. E. Purkyně University, that provide an overview of the historical wetland habi-
tats location. The main research question is to find out the potential use of historical maps for the identification of the historical wetlands in the Czech Republic and the evaluation of various interpretations of wetland habitats based on these sources. Examples of wetlands on historical map data in the upper part of the Výrovka River basin are presented.

Surface Water Status Assessment for the Third Cycle River Basin Management Plan of the Czech Republic

The aim of this article is to acquaint the professional public with the summary results of the assessment of chemical status and ecological status/potential of surface water bodies “river” and “lake” categories in the Czech Republic for 2016–2018.
This assessment is one from the basis for preparation of the Third River Basin Management Plan (2021–2027) at all its levels: sub-basin plans, national plans, and international plans of the Elbe, Danube, and Oder river basin districts.

The trajectory of wetlands development in the upper part of the Výrovka river basin over the last 180 years

The article is focused on analysis of the change of wetlands coverage and the representation of various types of wetlands in the upper part of the Výrovka river basin over the last 180 years. The historical maps of the Stable Cadastre, current orthophotographs and GIS layers of actual localization and classification of different types of land cover were used as data sources.

NAVAROSO expert information system

The article provides information on the development of the NAVAROSO expert information system built for the needs of components active in the event of an emergency situation on the water. It provides the cross-linked data needed to quickly obtain information on the possible causes of deterioration in water quality, procedures to determine the type of pollution and estimate its spread in the watercourse.

The Clean Water – a Healthy City: The usability of the existing information collection system to fulfillment of goals

The contribution is part of the Clean Water – a Healthy City project, which deals with the prediction of the possible occurrence of hazardous chemicals during the accidental pollution and floods. Lists the databases that are currently on the subject and with their practical applicability.

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.

Possibilities of using old topographic maps from the years 1763–1768 for evaluating the development of water bodies and the potential for their renewal

Potential of water areas restoration is a hot topic in present landscape planning. The focus is usually on water areas from mid-19th century where their location is quite good due to maps’ positional accuracy. Yet, we can also use older Austrian military survey from 1763–1768, which enables us to locate dams of water areas and assess potential for restoration of these areas.

Water towers – research project mapping the development and a form of tower water reservoirs on our territory

The paper presents a summary of input information about the research project Water towers – identification, documentation, presentation, new use. It deals with the development of tower water reservoirs in the present territory of the Czech Republic from the beginning of their creation to the present.

Bathymetric measurement for determination of morphology of water reservoir bottom

Information and communication technologies are currently one of the decisive factors influencing economic and social development. Similar developments and trends in relation to information and communication technologies can be observed in the field of water management.

The assessment of the status of surface water bodies in the Czech Republic for the period 2013–2015

This article aims to present to the general public the results of the assessment of the ecological status/potential and chemical status of surface water bodies categories “river“ and “lake“ for the period 2013 to 2015 in the Czech Republic. The assessment was carried out in 2017 by the Water Research Institute of T. G. Masaryk, p. r. i.

Possibilities of extrapolation of digital terrain model raster DMR 5G

Airborne laser imaging (LiDAR) has been carried out throughout the Czech Republic, enabling the creation of raster of digital model of terrain. This material is widely used in various fields. From the point of view of hydrology demands, however, the shortcoming of this technology resides in the absence of accurate/complete channel topography due to the absorption of the near-infrared laser beams by water.

Surface water body typology category river in the 1st and 2nd cycle of River Basin Management Plans and its consequence to ecological status assessment

Surface water body delineation and setting a typology are one of the initial steps during Water Framework Directive implementation (WFD) [1]. The first delineation and typology was prepared in 2004–2005 for the first plans, but all the results were significantly changed in the second cycle 2009–2010.

The National Spatial Data Infrastructure and the Reflection on the expected Role of Cartography and GIS Products provided by the T. G. Masaryk Water Research Institute, p.r.i.

The article shows the case of the best practice in the interdisciplinary management of the Spatial Data Set within River Network Section Model based on excellent cooperation of T. G. Masaryk Water Research Institute, p.r.i., with the Czech Office for Surveying, Mapping and Cadastre and the Czech Hydro-meteorological Institute.