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Lajos Horvath - One of the best experts on this subject based on the ideXlab platform.
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Environmental impacts of the Gabcikovo Barrage System to the Szigetköz region
Clean Technologies and Environmental Policy, 2002Co-Authors: S. Smith, F. Szilagyi, Lajos HorvathAbstract:In order to commission a large hydroelectric power plant in 1992, the Republic of Slovakia diverted the Danube River with a dam at a common section between Hungary and Slovakia. The dam is located at Gabcikovo in what now is Slovakian territory. The diversion, known as the Gabcikovo Barrage System (GBS), subsequently impacted one of the most ecologically important and unique alluvial floodplains of the Danube Basin. This, in turn, affected the hydrological regime of the Danube downstream and so, potentially, water supplies and water quality for millions of people. The potential environmental impacts of the diversion to the floodplain and downstream were not thoroughly studied prior to construction of the dam. The project was originally started jointly between Hungary and Slovakia in 1977 and conflicts arose between the two countries resulting in a case before The International Court of Justice (IJC) in 1993. In 1997, the IJC rendered a decision that a compromise solution had to be worked out accommodating the needs of both Hungary and Slovakia. The IJC said, in essence, that the dam would remain in place, but must be modified so as to minimize environmental impact. This paper reviews the history of the project and describes some impacts of the river diversion that may be attributed to changes in the water regime. In order to assess environmental impacts to the region due to diversion of water from the natural channel of the Danube, this study assessed, using satellite imagery, land cover change between 1988 and 1997. This study also correlated the satellite-derived data with reports from the Hungarian Ministries of Agriculture and the Environment and the North-Transdanubian Environmental Inspectorate. The analysis determined that, although land cover change occurred in the region during this period, not all of the changes could, necessarily, be related to the hydroelectric facility. The results of the analysis show that: (i) there were land cover changes in the study period within the study area; (ii) more time is needed in order to establish a link between the hydroelectric facility and environmental changes; (iii) satellite imagery could provide useful information in studies of this type, but the imagery must be used in conjunction with ground observations. This paper represents the views and opinions of the authors and not necessarily those of either the National Science Foundation or the Hungarian Academy of Sciences.
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Environmental impacts of the Gabcikovo Barrage System to the Szigetköz region
Clean Technologies and Environmental Policy, 2002Co-Authors: Scot E. Smith, F. Szilagyi, Lajos HorvathAbstract:In order to commission a large hydroelectric power plant in 1992, the Republic of Slovakia diverted the Danube River with a dam at a common section between Hungary and Slovakia. The dam is located at Gabcikovo in what now is Slovakian territory. The diversion, known as the Gabcikovo Barrage System (GBS), subsequently impacted one of the most ecologically important and unique alluvial floodplains of the Danube Basin. This, in turn, affected the hydrological regime of the Danube downstream and so, potentially, water supplies and water quality for millions of people.
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Environmental Impacts of River Diversion: Gabcikovo Barrage System
Journal of Water Resources Planning and Management, 2000Co-Authors: Scot E. Smith, Gyorgy Büttner, F. Szilagyi, Lajos Horvath, Joseph AufmuthAbstract:A hydroelectric power System known as the Gabcikovo Barrage System was completed on a section of the Danube River between Hungary and Slovakia in 1996. Originally, the utilization of the river for hydropower production in the common reach was a joint goal of the two countries. Hungary voided the contract in 1989 citing potential adverse environmental effects of the project and Slovakia finished the project alone. To put the Gabcikovo Hydropower Plant into operation, the Danube River was diverted into a power channel in Slovakia in 1992. This paper presents the environmental impacts of the Gabcikovo Barrage System in the 6 years since the diversion as detected and measured by Landsat satellite remote sensing imagery. The study area was limited to a part of the Szigetkoz (Hungarian side) and Csallokoz (Slovakian side) region located between flood dikes. This is a unique wetland System with numerous river branches immediately downstream from the dam. The study concluded that a number of important, but limited, environmental impacts are detectable from the satellite imagery and so the imagery provides a suitable means of monitoring future changes in the region. This case study is the only known application of satellite imagery for assessment of the environmental effects of a diversion of a major river.
F. Szilagyi - One of the best experts on this subject based on the ideXlab platform.
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Environmental impacts of the Gabcikovo Barrage System to the Szigetköz region
Clean Technologies and Environmental Policy, 2002Co-Authors: S. Smith, F. Szilagyi, Lajos HorvathAbstract:In order to commission a large hydroelectric power plant in 1992, the Republic of Slovakia diverted the Danube River with a dam at a common section between Hungary and Slovakia. The dam is located at Gabcikovo in what now is Slovakian territory. The diversion, known as the Gabcikovo Barrage System (GBS), subsequently impacted one of the most ecologically important and unique alluvial floodplains of the Danube Basin. This, in turn, affected the hydrological regime of the Danube downstream and so, potentially, water supplies and water quality for millions of people. The potential environmental impacts of the diversion to the floodplain and downstream were not thoroughly studied prior to construction of the dam. The project was originally started jointly between Hungary and Slovakia in 1977 and conflicts arose between the two countries resulting in a case before The International Court of Justice (IJC) in 1993. In 1997, the IJC rendered a decision that a compromise solution had to be worked out accommodating the needs of both Hungary and Slovakia. The IJC said, in essence, that the dam would remain in place, but must be modified so as to minimize environmental impact. This paper reviews the history of the project and describes some impacts of the river diversion that may be attributed to changes in the water regime. In order to assess environmental impacts to the region due to diversion of water from the natural channel of the Danube, this study assessed, using satellite imagery, land cover change between 1988 and 1997. This study also correlated the satellite-derived data with reports from the Hungarian Ministries of Agriculture and the Environment and the North-Transdanubian Environmental Inspectorate. The analysis determined that, although land cover change occurred in the region during this period, not all of the changes could, necessarily, be related to the hydroelectric facility. The results of the analysis show that: (i) there were land cover changes in the study period within the study area; (ii) more time is needed in order to establish a link between the hydroelectric facility and environmental changes; (iii) satellite imagery could provide useful information in studies of this type, but the imagery must be used in conjunction with ground observations. This paper represents the views and opinions of the authors and not necessarily those of either the National Science Foundation or the Hungarian Academy of Sciences.
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Environmental impacts of the Gabcikovo Barrage System to the Szigetköz region
Clean Technologies and Environmental Policy, 2002Co-Authors: Scot E. Smith, F. Szilagyi, Lajos HorvathAbstract:In order to commission a large hydroelectric power plant in 1992, the Republic of Slovakia diverted the Danube River with a dam at a common section between Hungary and Slovakia. The dam is located at Gabcikovo in what now is Slovakian territory. The diversion, known as the Gabcikovo Barrage System (GBS), subsequently impacted one of the most ecologically important and unique alluvial floodplains of the Danube Basin. This, in turn, affected the hydrological regime of the Danube downstream and so, potentially, water supplies and water quality for millions of people.
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Environmental Impacts of River Diversion: Gabcikovo Barrage System
Journal of Water Resources Planning and Management, 2000Co-Authors: Scot E. Smith, Gyorgy Büttner, F. Szilagyi, Lajos Horvath, Joseph AufmuthAbstract:A hydroelectric power System known as the Gabcikovo Barrage System was completed on a section of the Danube River between Hungary and Slovakia in 1996. Originally, the utilization of the river for hydropower production in the common reach was a joint goal of the two countries. Hungary voided the contract in 1989 citing potential adverse environmental effects of the project and Slovakia finished the project alone. To put the Gabcikovo Hydropower Plant into operation, the Danube River was diverted into a power channel in Slovakia in 1992. This paper presents the environmental impacts of the Gabcikovo Barrage System in the 6 years since the diversion as detected and measured by Landsat satellite remote sensing imagery. The study area was limited to a part of the Szigetkoz (Hungarian side) and Csallokoz (Slovakian side) region located between flood dikes. This is a unique wetland System with numerous river branches immediately downstream from the dam. The study concluded that a number of important, but limited, environmental impacts are detectable from the satellite imagery and so the imagery provides a suitable means of monitoring future changes in the region. This case study is the only known application of satellite imagery for assessment of the environmental effects of a diversion of a major river.
Scot E. Smith - One of the best experts on this subject based on the ideXlab platform.
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Environmental impacts of the Gabcikovo Barrage System to the Szigetköz region
Clean Technologies and Environmental Policy, 2002Co-Authors: Scot E. Smith, F. Szilagyi, Lajos HorvathAbstract:In order to commission a large hydroelectric power plant in 1992, the Republic of Slovakia diverted the Danube River with a dam at a common section between Hungary and Slovakia. The dam is located at Gabcikovo in what now is Slovakian territory. The diversion, known as the Gabcikovo Barrage System (GBS), subsequently impacted one of the most ecologically important and unique alluvial floodplains of the Danube Basin. This, in turn, affected the hydrological regime of the Danube downstream and so, potentially, water supplies and water quality for millions of people.
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Environmental Impacts of River Diversion: Gabcikovo Barrage System
Journal of Water Resources Planning and Management, 2000Co-Authors: Scot E. Smith, Gyorgy Büttner, F. Szilagyi, Lajos Horvath, Joseph AufmuthAbstract:A hydroelectric power System known as the Gabcikovo Barrage System was completed on a section of the Danube River between Hungary and Slovakia in 1996. Originally, the utilization of the river for hydropower production in the common reach was a joint goal of the two countries. Hungary voided the contract in 1989 citing potential adverse environmental effects of the project and Slovakia finished the project alone. To put the Gabcikovo Hydropower Plant into operation, the Danube River was diverted into a power channel in Slovakia in 1992. This paper presents the environmental impacts of the Gabcikovo Barrage System in the 6 years since the diversion as detected and measured by Landsat satellite remote sensing imagery. The study area was limited to a part of the Szigetkoz (Hungarian side) and Csallokoz (Slovakian side) region located between flood dikes. This is a unique wetland System with numerous river branches immediately downstream from the dam. The study concluded that a number of important, but limited, environmental impacts are detectable from the satellite imagery and so the imagery provides a suitable means of monitoring future changes in the region. This case study is the only known application of satellite imagery for assessment of the environmental effects of a diversion of a major river.
Ivan Habdija - One of the best experts on this subject based on the ideXlab platform.
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Distribution of rotifers and other meiofauna in the bryophytes and hyporheic zone of a karst hydroSystem – an example of a nested community
Marine and Freshwater Research, 2017Co-Authors: Tvrtko Dražina, Maria Špoljar, Biserka Primc, Ivan HabdijaAbstract:The meiofauna assemblages inhabiting the bryophyte-covered tufa barriers were investigated in the Barrage System of Plitvice Lakes (Croatia). The main aims of the present study were: (1) to analyse the structure of the rotifer community and other meiofaunal communities in the bryophytes and the hyporheic tufa zone; and (2) to determine the influence of food sources on the meiofauna. Our results indicate that meiofauna were a constant and abundant component in bryophytes and tufa. Of the nine identified groups (Catenulida, Gastrotricha, Nematoda, Rotifera, Hydrachnidia, Oligochaeta, Copepoda, Tardigrada and Chironomidae (Diptera)), rotifers (50%) and nematodes (40%) were most abundant. Rotifers were the most diverse meiofaunal group and reached their highest numbers within the bryophytes. Also, the highest amount of ultrafine particulate organic matter, as a potential food source for rotifers, was recorded in this layer. Nematodes were the dominant meiofaunal group in deeper tufa layers. They are an omnivorous trophic group and different food sources (such as phytal remains or other meiofauna) were available in tufa layers. Meiofaunal assemblages were significantly nested and their composition was under the influence of community established in surface bryophyte mats. Information on these often overlooked faunal groups is essential for estimates of overall abundance, species richness and productivity in freshwater ecoSystems.
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seasonal and spatial patterns of macroinvertebrate drift and seston transport in karst lotic habitats of the Barrage System of plitvice lakes croatia
10. hrvatski biološki kongres s međunarodnim sudjelovanjem, 2009Co-Authors: Mirela Sertic Peric, Marko Miliša, Renata Matoničkin Kepčija, Ines Radanovic, Biserka Primchabdija, Ivan HabdijaAbstract:Sastav drifta bentickih beskraljesnjaka i sestona istraživan je u stanistima krskog kaskadnog sustava Plitvickih jezera. Od listopada 2006. do rujna 2007. mjesecno su uzimani podnevni i vecernji uzorci drifta i sestona na sest postaja unutar odabrane istraživacke dionice. S obzirom na njihov položaj i udaljenost od barijere s pridruženim slapistem, istraživacke postaje su predstavljale razlicita loticka stanista. Iako je zabilježena veca gustoca drifta bentickih beskralježnjaka i sestona u uvjetima vece brzine strujanja vode, nije dokazana znacajna uzajamna zavisnost brzine strujanja vode i gustoce drifta. Stoga nismo potvrdili polaznu pretpostavku, da su prostorne razlike u sastavu drifta primarno posljedica razlicitih lotickih uvjeta. Na sezonskoj i prostornoj ljestvici zabilježena je znacajna pozitivna uzajamna zavisnost gustoce mahovina i vecine ostalih drift-pokazatelja, dodatno opisana sezonskim razlikama u temperaturi, hidrokemijskim pokazateljima i sastavu vodene vegetacije. Tijekom jeseni i zime opaženo je znatno odumiranje mahovina te njihov pojacani nizvodni transport, zajedno s usitnjenom organskom i anorganskom tvari te pojedinim skupinama bentickih beskraljesnjaka. Temeljem opaženog, zakljuceno je da sezonske mijene fizikalnih i kemijskih uvjeta u lotickim stanistima Plitvickih jezera imaju snažan utjecaj na vremenske i prostorne trendove drifta unutar promatranog krskog kaskadnog sustava te na taj nacin uvjetuju sastav i dinamiku prisutnih bentoskih zajednica.
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The impact of aquatic macrophyte (Salix sp. and Cladium mariscus (L.) Pohl.) removal on habitat conditions and macroinvertebrates of tufa barriers (Plitvice Lakes, Croatia)
Hydrobiologia, 2006Co-Authors: Marko Miliša, Renata Matoničkin Kepčija, Ines Radanović, Ana Ostojić, Ivan HabdijaAbstract:The effects of aquatic macrophyte (willows and sawgrass) removal on flow velocity, tufa deposition, POM dynamics, and macroinvertebrate community structure were studied in the tufa barrier habitats of the Barrage System of Plitvice Lakes, Croatia. Samples were collected from two hydraulic habitats (fast > 100 cm s^−1 and slow < 100 cm s^−1) at both a control (no macrophytes removed) and impact (macrophytes removed) site. Samples were collected with a core sampler (four layers in vertical profile of barrier bed) monthly on 6 dates before and 7 dates after the removal of macrophytes. Macrophytes were removed in May 2002 at the impact site. After the macrophyte removal flow velocity decreased significantly at both hydraulic habitats. Retarded flow resulted in: (a) a decrease in macroinvertebrate density and diversity since most of the taxa were rheophilic (preferring habitats with higher flow velocity) and (b) an increase in POM concentrations (FPOM and UPOM) since decreases in flow velocity facilitate particle deposition in lotic habitats. The effects of macrophyte removal were present, and diminish along the vertical sediment profile of the barrier bed. Tufa deposition was not influenced by the macrophyte removal.
I. Zsuffa - One of the best experts on this subject based on the ideXlab platform.
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Impact of Austrian hydropower plants on the flood control safety of the Hungarian Danube reach
Hydrological Sciences Journal, 1999Co-Authors: I. ZsuffaAbstract:Abstract Statistical analysis of daily water level data from four gauging stations along the Hungarian Danube reach has been carried out with the purpose of analysing the impact of the Austrian hydropower plants on the floods of the river. Conditional probability distribution functions of annual flood load maxima and annual number of floods were generated for the periods 1957–1976 and 1977–1996. By comparing these distribution functions, it could be shown that the flood load maxima have decreased, while the number of small and medium floods have increased during the past forty years. These changes indicate a decreased rate of flood superposition resulting from the Barrages constructed in this period. The significantly decreased flood load maxima indicate that the Austrian Barrage System has a positive impact on the flood control safety of the Hungarian Danube reach.
