Environmental Impacts of River Diversion: Gabcikovo Barrage System

Smith, Scot E.; Büttner, Gyorgy; Szilágyi, Ferenc; Horváth, Lajos; Aufmuth, Joseph

doi:10.1061/(asce)0733-9496(2000)126:3(138)

Cited by 23 publications

(21 citation statements)

References 4 publications

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“…Aquatic habitats with high spatial heterogeneity favour the structuring of communities with high diversity because it allows different organisms, in functional and morphological terms, to successfully exploit available niches (Freitas et al, 2005). Regulated flows cause decreased velocity and depth, causing immediate loss of some habitats (Brasher, 2003), and the loss of habitat heterogeneity as a result of long-term changes in river morphometry and associated riparian forests (Smith et al, 2000).…”

Section: Abundance (Cpue)mentioning

confidence: 99%

Response of the riverine fish community to the construction and operation of a diversion hydropower plant in central Chile

Habit

Belk

Parra

2006

Aquatic Conservation

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ABSTRACT1. Chilean rivers have a large potential for hydropower development, and they also contain a unique native fish fauna with a high level of endemism. Several diversion hydropower plants have recently been constructed in Chile; however, the response of fish communities to these new hydropower plant designs is not well known.2. Responses of native and non-native fish to the construction and operation of a new hydropower plant that diverts water from two rivers were quantified. The Laja River is highly regulated and manipulated with three older (40 yr) dam-based hydropower plants and irrigation diversions located upstream from the new facility. In contrast, the Rucu´e River has no other hydropower facilities and is comparatively undisturbed.3. Prior to construction, the Laja River had a fish community with lower species richness compared with the Rucu´e River. The fish community structure in the Laja River was dramatically altered after the new hydropower facility began operation. On the other hand, in the Rucu´e River, even though abundance of fish declined, there was less of a change in the total fish community structure. The fish community in the Rucu´e River exhibited greater resistance to change compared with the Laja River.4. The species most affected were the introduced salmonids and an endangered native species Percilia irwini.5. Although diversion hydropower designs may have less impact than traditional dam-based hydropower facilities, results of this study indicate that diversion hydropower structures can cause large changes in the fish community.

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Section: Abundance (Cpue)mentioning

confidence: 99%

Response of the riverine fish community to the construction and operation of a diversion hydropower plant in central Chile

Habit

Belk

Parra

2006

Aquatic Conservation

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“…It has been reported in the same study of Ijjas et al (2010) that the unique diverse pattern of habitat types have been significantly affected by the changed flow and sediment regime, and an alteration has been detected from aquatic or aquatic-related species to more terrestrial ones. Medium resolution Landsat satellite image analysis showed negative changes of the normalized vegetation indices in short-term (1992)(1993) (Smith et al 2000), caused by dropping groundwater levels, as were documented and modelled in the region (Vekerdy -Meijerink 1998). Similarly to that, changes were detected in the wetness values based on the Tasseled Cap transformation of Landsat, however, from 1997 a continuous regeneration is experienced, except for older willow species (Kristóf 2005).…”

Section: Study Sitementioning

confidence: 71%

Aerial Image Classification for the Mapping of Riparian Vegetation Habitats

Kollár¹,

Vekerdy²,

Márkus³

2013

Acta Silvatica Et Lignaria Hungarica

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-In the current study, aerial image analysis has been applied to map vegetation communities in a riparian wetland ecosystem, Szigetköz (Hungary). Remote sensing offers an objective and timeeffective method for the detection of detailed vegetation habitats with the use of high resolution aerial photos combined with ancillary botanical and silvicultural data. Three images of the same test site, acquired in three different years have been analysed by sample-based semi-automated image classification technique. Due to the heterogeneous nature of the target vegetation classes, besides using spectral features (e.g. vegetation indices) textural descriptors were also involved in the classification procedure. The most appropriate parameters have been chosen using a statistical feature selection method based on the Jeffries-Matusita distance. The accuracy assessment proved for each scene that the combined use of spectral and textural features gave the best classification results in comparison to the exclusive use of spectral or textural measures. The here-applied feature set can be applied for the analysis of similar riparian sites. remote sensing / high resolution imagery / riparian wetland / texture analysis Kivonat -Légifelvételek osztályozása vizes élőhelyek térképezése céljából. A tanulmány célja légi-felvételek elemzésére szolgáló módszer kidolgozása vizes élőhelyek vegetációtérképezéséhez, melyet a szigetközi folyómenti mintaterületen vizsgáltunk. A hagyományos terepi felméréssel szemben a távérzékelés lehetővé teszi vizes élőhelyek megközelítően objektív és gyors térképezését nagy felbontású légifelvételek és kiegészítő botanikai és erdészeti adatok felhasználásával. A mintavételen alapuló fél-automatikus képosztályozás eredményesnek bizonyult a kiválasztott három képre alkalmazva (adott tesztterület három időpontra). A vegetációs célosztályok heterogén természetéből adódik, hogy a spektrális jellemzők (vegetációs index) vizsgálata mellett texturális jellemzők bevonására is szükség van az osztályozási algoritmusok kialakításához. A legjelentősebb paramétereket a Jeffries-Matusita statisztikai kiválasztó módszer segítségével határoztuk meg. Megbízhatósági elemzés alapján a spektrális és texturális jellemzők együttes alkalmazása adta a legjobb osztályozási eredményeket a kizárólag spektrális vagy texturális paraméterek felhasználásával szemben. Hasonló ártéri területek növényzeti térképezéséhez a kiválasztott jellemzők alapértelmezett alkalmazása javasolt. távérzékelés / nagy felbontású felvétel / folyómenti vizes élőhely / texturális elemzés

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“…In October 1992, a section of the Danube 58 km in length was diverted in the area of the Szigetköz into a 27 km long cement power canal (Smith et al 2000) at river kilometer (rkm) 1851.75 in connection with the construction of the Gabčíkovo power plant (Bős) (Jansky et al 2004. The diversion was undertaken by Slovakia, as in 1989 Hungary decided not to participate further in the originally bilateral hydropower plant construction project.…”

Section: Adverse Effects Of Anthropogenic Activity: Interaction Betwementioning

confidence: 99%

“…The diversion was undertaken by Slovakia, as in 1989 Hungary decided not to participate further in the originally bilateral hydropower plant construction project. Thus, Slovakia finished a version of the project in 1996 which circumvented Hungary, making cooperation between the two countries unnecessary (Smith et al 2000).…”

Section: Adverse Effects Of Anthropogenic Activity: Interaction Betwementioning

confidence: 99%

Assessment of the interaction between surface- and groundwater after the diversion of the inner delta of the River Danube (Hungary) using multivariate statistics

et al. 2018

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Anthropogenic activity such as damming or diversion of rivers cause extensive disturbance to ecosystems, as well as the interaction between surface water and groundwater.Following the diversion in 1992 of the River Danube (NW Hungary) and the construction of a water barrage system, the level of shallow groundwater dropped and altered the connection between surface water and groundwater. This paper outlines the changes in the interaction of surface water and shallow groundwater and other related environmental consequences caused by an 80% decrease in runoff resulting from this intervention. The time series (1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004) of 27 water quality variables measured from three surface and three subsurface sampling sites Prerpint of ATHROPOCENE 22, pp. 51-65 doi: https://doi.org/10.1016/j.ancene.2018.05.002 2 were analyzed using periodicity, hierarchical cluster-and principal component analyses. It was found that: (i) the degree of riverbed clogging increased due to diminished runoff; this clogging blocked interaction between surface water and groundwater at certain sampling sites; (ii) extreme floods were capable of resetting this situation and changing the flow currents to differing degrees in the surface/sub-surface waters. These findings enabled a better understanding of the changes in water quality primarily attributable to the diversion of the river (the change in water level, riverbed clogging etc.). The changed hydrological setting of the subject area became very similar to that which might be expected to evolve due to climate change around the world. Thus, the study not only serves as an example for the processes evolving (e.g. riverbed clogging) in similarly modified river sections, but to those as well, which are expected to suffer from aridification.

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Environmental Impacts of River Diversion: Gabcikovo Barrage System

Cited by 23 publications

References 4 publications

Response of the riverine fish community to the construction and operation of a diversion hydropower plant in central Chile

Response of the riverine fish community to the construction and operation of a diversion hydropower plant in central Chile

Aerial Image Classification for the Mapping of Riparian Vegetation Habitats

Assessment of the interaction between surface- and groundwater after the diversion of the inner delta of the River Danube (Hungary) using multivariate statistics

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