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Dr. Henrich Grežo
Constantine the Philosopher University in Nitra

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Research Keywords & Expertise

0 GIS
0 Landscape Analysis
0 Sustainability
0 Flood Risk Assessment and Management
0 Environemntal Assessment

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Flood Risk Assessment and Management

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Short Biography

University educator/researcher. Education background: Ph.D degree, graduated in 2011 from Constantine the Philosopher University in Nitra in the field of environmentalism. Work experience: 10 years of experience in teaching geographic information systems, administrator of the faculty's GIS laboratory, co-author of the GIS teaching concept at the faculty. He created and participated in the creation of several e-learning courses aimed at teaching GIS and contributed to the implementation of some of the information systems used at the university. Current and previous research interests: scientific work related to projects aimed at assessing landscape changes and sustainable development. Memberships of professional societies and awards received: SEKOS Slovakia (Slovak Ecological Society), Rector's Award for Internationally Acceptable Publishing Activities for 2015/2016 and 2019/2020 (original scientific publications registered with the Web of Knowledge and Scopus databases).

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Conference paper
Published: 01 July 2021 in EDULEARN21 Proceedings
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ACS Style

Henrich Grežo; Regína Mišovičová; Zuzana Pucherová. THE KEY ROLE OF GEOGRAPHIC INFORMATION SYSTEMS IN ENVIRONMENTAL EDUCATION. EDULEARN21 Proceedings 2021, 9765 -9769.

AMA Style

Henrich Grežo, Regína Mišovičová, Zuzana Pucherová. THE KEY ROLE OF GEOGRAPHIC INFORMATION SYSTEMS IN ENVIRONMENTAL EDUCATION. EDULEARN21 Proceedings. 2021; ():9765-9769.

Chicago/Turabian Style

Henrich Grežo; Regína Mišovičová; Zuzana Pucherová. 2021. "THE KEY ROLE OF GEOGRAPHIC INFORMATION SYSTEMS IN ENVIRONMENTAL EDUCATION." EDULEARN21 Proceedings , no. : 9765-9769.

Journal article
Published: 06 May 2021 in Sustainability
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Cultural tourism has undergone fundamental changes in several countries of post-socialist Europe. In Slovakia, this fact concerns, for example, localities with a strong connection to the church and its cultural heritage. These monuments belong to the foundations of cultural tourism, yet the state intentionally did not prefer them as tourist destinations until 1989. Only after political and social changes were such localities exploited by tourism with a qualitative and quantitative increase in cultural tourism. The aim of this paper is to investigate the recent changes in cultural tourism in urban areas and to address alternative cultural tourism products to diversify the offerings. To do so, Nitra (Slovakia) was used as a case study area. The main used methods were comparative analysis of information sources and questionnaire surveys, aimed at residents, entrepreneurs, and tourists. The main result is that Nitra has the potential to become an important center of cultural tourism/stage destination of various cultural routes. The presented results will increase awareness of the present and future of cultural tourism; they can be beneficial for organizations dealing with tourism management in the city (city office) and its marketing (Nitra Tourism Organization) for the academic and public sphere.

ACS Style

Alfred Krogmann; Peter Ivanič; Hilda Kramáreková; Lucia Petrikovičová; František Petrovič; Henrich Grežo. Cultural Tourism in Nitra, Slovakia: Overview of Current and Future Trends. Sustainability 2021, 13, 5181 .

AMA Style

Alfred Krogmann, Peter Ivanič, Hilda Kramáreková, Lucia Petrikovičová, František Petrovič, Henrich Grežo. Cultural Tourism in Nitra, Slovakia: Overview of Current and Future Trends. Sustainability. 2021; 13 (9):5181.

Chicago/Turabian Style

Alfred Krogmann; Peter Ivanič; Hilda Kramáreková; Lucia Petrikovičová; František Petrovič; Henrich Grežo. 2021. "Cultural Tourism in Nitra, Slovakia: Overview of Current and Future Trends." Sustainability 13, no. 9: 5181.

Conference paper
Published: 01 March 2021 in INTED2021 Proceedings
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Henrich Grežo; Zuzana Pucherová; Regína Mišovičová. ADAPTATION OF ENVIRONMENTAL EDUCATION DURING THE COVID-19 PANDEMIC LOCKDOWN. INTED2021 Proceedings 2021, 10324 -10328.

AMA Style

Henrich Grežo, Zuzana Pucherová, Regína Mišovičová. ADAPTATION OF ENVIRONMENTAL EDUCATION DURING THE COVID-19 PANDEMIC LOCKDOWN. INTED2021 Proceedings. 2021; ():10324-10328.

Chicago/Turabian Style

Henrich Grežo; Zuzana Pucherová; Regína Mišovičová. 2021. "ADAPTATION OF ENVIRONMENTAL EDUCATION DURING THE COVID-19 PANDEMIC LOCKDOWN." INTED2021 Proceedings , no. : 10324-10328.

Journal article
Published: 24 January 2021 in Sustainability
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Suburbanization, as a set of several factors, influences and changes the landscape structure of smaller municipalities in the hinterland of larger cities. The purpose of this paper is to evaluate the built-up areas related to suburbanization within three time horizons—in 2002, 2005, and 2020—in 62 municipalities of the district (including two cities, Nitra and Vráble). This study examines the process of spatial changes in landscape features (residential, industrial, agricultural, transport) related to suburbanization between 2002 and 2005 and between 2002 and 2020. The input analytical data were digital orthophotomaps from 2002 and 2005 and the current orthophotomosaics of the Slovak Republic from 2017 (GKÚ, Bratislava), updated for the year 2020 using Sentinel 2 satellite image data (European Space Agency). The impact of suburbanization processes between 2002 and 2005 did not reach the dimensions of the changes that occurred due to suburbanization processes between 2002 and 2020 or 2005 and 2020. The main research objective of the article is the identification and assessment of these changes. We determined which landscape features related to suburbanization affected spatial changes in municipalities of the district Nitra. The total area affected by one of the suburbanization processes monitored by us reached 92.52 ha in the period between 2002 and 2005. Between the years 2002 and 2020, the area reached a total of 2272.82 ha, which is an increase of 2180.30 ha in 2020 compared to 2002. This included mainly the expansion of settlements or housing (60.15%), industrial areas (29.31%), transport facilities (4.35%), agricultural areas (0.73%), and other areas (5.46%). These results show expanding suburbanization for the period from 2002 to 2020 and that this process has been gaining momentum in the municipalities of the Nitra district, especially in recent years, which changes the look of rural municipalities and the character of a typical rural landscape.

ACS Style

Zuzana Pucherová; Regina Mišovičová; Gabriel Bugár; Henrich Grežo. Changes in Landscape Structure in the Municipalities of the Nitra District (Slovak Republic) Due to Expanding Suburbanization. Sustainability 2021, 13, 1205 .

AMA Style

Zuzana Pucherová, Regina Mišovičová, Gabriel Bugár, Henrich Grežo. Changes in Landscape Structure in the Municipalities of the Nitra District (Slovak Republic) Due to Expanding Suburbanization. Sustainability. 2021; 13 (3):1205.

Chicago/Turabian Style

Zuzana Pucherová; Regina Mišovičová; Gabriel Bugár; Henrich Grežo. 2021. "Changes in Landscape Structure in the Municipalities of the Nitra District (Slovak Republic) Due to Expanding Suburbanization." Sustainability 13, no. 3: 1205.

Journal article
Published: 21 January 2021 in Sustainability
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Water meadows or flooded meadows are known from many European countries. A historical irrigation system—catchworks—was identified in only one locality in Slovakia. This article brings a methodical approach to the identification of catchworks on mountain slopes. The main aim was to delineate catchworks using terrain and land use geospatial data intended to supplement existing data on catchworks from the field survey. The identification of shallow and narrow channels in the field is difficult, and their detection in a digital terrain model (DTM) and orthomosaic photos is also challenging. A detailed DTM elaborated from laser scanning data was not available. Therefore, we employed break lines of a Triangulated Irregular Network (TIN) model created by EUROSENSE Ltd. 2017, Bratislava, Slovakia. to determine microtopographic features on mountain slopes. Orthomosaics with adjusted red (R) green (G) and blue (B) band thresholds (digital numbers) in a time sequence of 16 years (2002–2018) and the Normalized Green-Red Difference Index (NGRDI) (2018) determined vital herbaceous vegetation and higher biomass. In both cases, the vegetation inside wet functional catchworks was differently coloured from the surroundings. In the case of dry catchworks, the identification relied only on microtopography features. The length of catchworks mapped in the field (1939.12 m; 2013) was supplied with potential catchworks detected from geospatial data (2877.18; 2018) and their total length in the study area increased above 59.74% (4816.30 m). Real and potential catchworks predominantly occupied historical grassland (meadows and pastures) (1952–1957) (4430.31; 91.99%). This result corresponds with the findings of foreign studies referring that catchworks on mountain slopes were related to livestock activities. They are important elements of sustainable land use with a water retention function in traditional agricultural landscapes.

ACS Style

Martina Slámová; Juraj Hreško; František Petrovič; Henrich Grežo. Catchworks: A Historical Water-Distribution System on Mountain Meadows in Central Slovakia. Sustainability 2021, 13, 1107 .

AMA Style

Martina Slámová, Juraj Hreško, František Petrovič, Henrich Grežo. Catchworks: A Historical Water-Distribution System on Mountain Meadows in Central Slovakia. Sustainability. 2021; 13 (3):1107.

Chicago/Turabian Style

Martina Slámová; Juraj Hreško; František Petrovič; Henrich Grežo. 2021. "Catchworks: A Historical Water-Distribution System on Mountain Meadows in Central Slovakia." Sustainability 13, no. 3: 1107.

Journal article
Published: 19 May 2020 in Sustainability
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The intention of the article is to demonstrate how data from historical maps might be applied in the process of flood risk assessment in peri-urban zones located in floodplains and be complementary datasets to the national flood maps. The research took place in two industrial parks near the rivers Žitava and Nitra in the town of Vráble (the oldest industrial park in Slovakia) and the city of Nitra (one of the largest industrial parks in Slovakia, which is still under construction concerning the Jaguar Land Rover facility). The historical maps from the latter half of the 18th and 19th centuries and from the 1950s of the 20th century, as well as the field data on floods gained with the GNSSS receiver in 2010 and the Q100 flood line of the national flood maps (2017), were superposed in geographic information systems. The flood map consists of water flow simulation by a mathematical hydrodynamic model which is valid only for the current watercourse. The comparison of historical datasets with current data indicated various transformations and shifts of the riverbanks over the last 250 years. The results proved that the industrial parks were built up on traditionally and extensively used meadows and pastures through which branched rivers flowed in the past. Recent industrial constructions intensified the use of both territories and led to the modifications of riverbeds and shortening of the watercourse length. Consequently, the river flow energy increased, and floods occurred during torrential events in 2010. If historical maps were respected in the creation of the flood maps, the planned construction of industrial parks in floodplains could be limited or forbidden in the spatial planning documentation. This study confirmed that the flood modelling using the Q100 flood lines does not provide sufficient arguments for investment development groups, and flood maps might be supplied with the data derived from historical maps. The proposed methodology represents a simple, low cost, and effective way of identifying possible flood-prone areas and preventing economic losses and other damages.

ACS Style

Henrich Grežo; Matej Močko; Martin Izsóff; Gréta Vrbičanová; František Petrovič; Jozef Straňák; Zlatica Muchová; Martina Slámová; Branislav Olah; Ivo Machar. Flood Risk Assessment for the Long-Term Strategic Planning Considering the Placement of Industrial Parks in Slovakia. Sustainability 2020, 12, 4144 .

AMA Style

Henrich Grežo, Matej Močko, Martin Izsóff, Gréta Vrbičanová, František Petrovič, Jozef Straňák, Zlatica Muchová, Martina Slámová, Branislav Olah, Ivo Machar. Flood Risk Assessment for the Long-Term Strategic Planning Considering the Placement of Industrial Parks in Slovakia. Sustainability. 2020; 12 (10):4144.

Chicago/Turabian Style

Henrich Grežo; Matej Močko; Martin Izsóff; Gréta Vrbičanová; František Petrovič; Jozef Straňák; Zlatica Muchová; Martina Slámová; Branislav Olah; Ivo Machar. 2020. "Flood Risk Assessment for the Long-Term Strategic Planning Considering the Placement of Industrial Parks in Slovakia." Sustainability 12, no. 10: 4144.

Journal article
Published: 01 January 2020 in Geografické informácie
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Martina Ľahká; Anna Štefanková; Henrich Grežo; Patrícia Barančoková. Potenciál rozvoja obce Župkov v Mikroregióne Kľakovská dolina. Geografické informácie 2020, 24, 1 .

AMA Style

Martina Ľahká, Anna Štefanková, Henrich Grežo, Patrícia Barančoková. Potenciál rozvoja obce Župkov v Mikroregióne Kľakovská dolina. Geografické informácie. 2020; 24 (1):1.

Chicago/Turabian Style

Martina Ľahká; Anna Štefanková; Henrich Grežo; Patrícia Barančoková. 2020. "Potenciál rozvoja obce Župkov v Mikroregióne Kľakovská dolina." Geografické informácie 24, no. 1: 1.

Conference paper
Published: 01 November 2019 in ICERI2019 Proceedings
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Henrich Grežo; František Petrovič. HOW OPEN SOURCE CAN EXPAND TEACHER'S HORIZONS. ICERI2019 Proceedings 2019, 8515 -8519.

AMA Style

Henrich Grežo, František Petrovič. HOW OPEN SOURCE CAN EXPAND TEACHER'S HORIZONS. ICERI2019 Proceedings. 2019; ():8515-8519.

Chicago/Turabian Style

Henrich Grežo; František Petrovič. 2019. "HOW OPEN SOURCE CAN EXPAND TEACHER'S HORIZONS." ICERI2019 Proceedings , no. : 8515-8519.

Journal article
Published: 19 October 2014 in Applied Research in Quality of Life
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Human activity has significantly influenced energy flows in the landscape. Physical and geographical features of an area in the context of natural processes highlight their influence on the human lives in the affected regions of Slovakia. The paper aimed on the influence of the extraordinary flooding impact in June 2013 on the quality of life in Slovak rural regions. We have investigated the impact of the resulting damage on human activities in the rural municipality of Chľaba. The case study of southern Slovakia can provide a more realistic view at regularly flooded areas in Slovak geographical conditions. The target of our research was to map and monitor the situation during the floods and shortly after them and to draw proposals leading to a more operative approach in the context of comprehensive flood protection in Slovakia. The added value of the research is a creation of such graphical supporting documents, which could be served as a basis for creating the plan of flood prevention management in rural territories, as a part of negative impacts of floods reduction on human activities.

ACS Style

Andrea Jakubcová; Henrich Grežo; Anna Hrešková; František Petrovič. Impacts of Flooding on the Quality of Life in Rural Regions of Southern Slovakia. Applied Research in Quality of Life 2014, 11, 221 -237.

AMA Style

Andrea Jakubcová, Henrich Grežo, Anna Hrešková, František Petrovič. Impacts of Flooding on the Quality of Life in Rural Regions of Southern Slovakia. Applied Research in Quality of Life. 2014; 11 (1):221-237.

Chicago/Turabian Style

Andrea Jakubcová; Henrich Grežo; Anna Hrešková; František Petrovič. 2014. "Impacts of Flooding on the Quality of Life in Rural Regions of Southern Slovakia." Applied Research in Quality of Life 11, no. 1: 221-237.

Journal article
Published: 05 September 2014 in Natural Hazards
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The village of Chľaba is located in the southwest Slovakia, bordered with the fork of Danube River and Ipeľ River and in the southeast foothill of Burda Mts. This creates a specific rural environment of a Slovak–Hungarian border area. Ministry of Environment of the Slovak republic did not include this village in the list of potential significant flood risk areas, despite the fact that during the time of extraordinary floods, the village of Chľaba is completely separated from the only functional access road. This leads to great damages on arable land plots in the inundation area and consequently to a significant soil erosion. This phenomenon takes place in the area of huge parcels, which are characterized by intensive agriculture activities and harvests. In the paper, we tried to identify the range of the flood affected areas during the time of extraordinary floods (June 2013) and to propose flood protection arrangements within the landscape utilization changes in affected areas. The article presents the resulting map of the sloped and under-flooding areas, based not only on a terrain identification by conventional methods of field research, but also on a comparison of real slopped areas in 2013 with prognostic flood hazard map and flood risk map created by the Danube Floodrisk project. In the conclusion, we propose landscape utilization changes, which could lead to more effective human activities applications in the cadastral territory of the Chľaba village. This attitude might reduce the negative impact of floods in the researched endangered territory.

ACS Style

A. Jakubcová; H. Grežo; Juraj Hreško. Identification of areas with significant flood risk at the confluence of Danube and Ipeľ rivers (southern Slovakia). Natural Hazards 2014, 75, 849 -867.

AMA Style

A. Jakubcová, H. Grežo, Juraj Hreško. Identification of areas with significant flood risk at the confluence of Danube and Ipeľ rivers (southern Slovakia). Natural Hazards. 2014; 75 (1):849-867.

Chicago/Turabian Style

A. Jakubcová; H. Grežo; Juraj Hreško. 2014. "Identification of areas with significant flood risk at the confluence of Danube and Ipeľ rivers (southern Slovakia)." Natural Hazards 75, no. 1: 849-867.