Complex response of river channel morphology subsequent to reservoir construction

Petts, Geoffrey E.

doi:10.1177/030913337900300302

Cited by 282 publications

(222 citation statements)

References 29 publications

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“…Schumm, 1977;Petts, 1979) to Italian rivers, considering not only the direction of channel changes induced by a disturbance but also, though still in qualitative terms, the rate of change and channel pattern adjustment. It is consistent with the model proposed by Schumm (1977), since in the case of a decrease in sediment supply, that model predicts a decrease of channel width, an increase of channel depth, a decrease of gradient, an increase of sinuosity and a decrease of meander wavelength.…”

Section: Styles Of Channel Adjustmentsmentioning

confidence: 99%

“…Several studies have analysed the response of rivers to human impact, showing that remarkable channel changes generally take place, such as vertical adjustment, changes in channel width and pattern (e.g. Leopold, 1973;Gregory and Park, 1974;Williams, 1978;Petts, 1979;Williams and Wolman, 1984;Andrews, 1986;Knighton, 1991;Collier et al, 1996;Petit et al, 1996;Kondolf, 1997). These changes are generally much larger than those that could be expected from natural channel evolution, although in some cases also natural phenomena, such as large floods, fires and volcanic eruptions, or short-term climatic fluctuations (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Morphological response to river engineering and management in alluvial channels in Italy

2003

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In response to various types of human disturbance, most Italian rivers have experienced considerable channel adjustment during the last centuries and in particular in the last decades. This paper reviews all existing published studies and available data, and aims to reconstruct a general outline of the main channel adjustments that have occurred in Italian rivers during the past 100 years.Two main types of channel adjustment have been recognized: (a) incision, which is commonly on the order of 3 -4 m, but in some cases is even more than 10 m; (b) narrowing, with channel width reduction up to 50% or more. In some reaches, these adjustments have led to changes in channel pattern in particular from braided to wandering.Such channel adjustments are due to several types of human intervention, particularly sediment extraction, dams and channelization. A strong temporal relationship (specifically, short reaction times) between human disturbance and channel adjustment can be inferred, but trends of adjustment are available for only a few rivers (e.g. the Po, the Arno and the Piave Rivers). These trends show that incision and/or narrowing are more intense immediately after the disturbance and then slow and become asymptotic; the same trends also suggest that larger rivers could have longer relaxation times.The results of this study are synthesised in a general classification scheme that summarises the main styles of adjustment observed in Italian rivers. According to the scheme, braided rivers adjust through prevalent narrowing with varying rates of incision, whereas single-thread rivers adjust mainly through a more pronounced incision accompanied by various amounts of narrowing. The scheme, representing initial and final (present) morphologies and not including intermediate stages of channel adjustment, will need to be tested on the basis of more detailed data to have a wider application both to the Italian context and to fluvial systems elsewhere, affected by similar types of human disturbance causing a reduction of sediment supply. D

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Section: Styles Of Channel Adjustmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Morphological response to river engineering and management in alluvial channels in Italy

2003

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“…Bien que les effets de la régulation des crues par un barrage sur la morphologie (PETTS, 1979 ;BRANDT, 2000) et la biologie (POWER ef al., 1996) soient relativement connus, il semble que les conséquences morphologiques et biologiques de l'inversion du régime hydrologique d'un cours d'eau ne soient pas encore bien documentées dans la littérature. Ceci est encore plus vrai pour le Québec où la qualité des habitats d'hiver peut jouer un rôle crucial pour la vie aquatique.…”

Section: Seasonal Discharge Coefficients Upstream and Downstream Fromunclassified

“…Comme l'avait déjà fait remarquer VIVIAN (1994) même dans la littérature internationale, très peu de travaux existent sur les impacts des barrages sur les régimes hydrologiques de cours d'eau (MAHESHWARl et al, 1995 ;ASSANl étal., 1999 ;ERSKINE ef al., 1999 ;LOIZEAU et DOMINIK, 2000). La plupart des travaux sont consacrés à l'analyse des impacts morphodynamiques (PETTS, 1979 ;AMOROS et PETTS, 1993 ;BRANDT, 2000) ou biologiques (PETTS, 1984 ;LIGON ef al., 1995 ;POWER ef al., 1996). Pourtant, ces impacts morphologiques et biologiques dépendent en grande partie des modifications qui affectent les régimes des débits (ASSANl, 1997), d'où l'intérêt de quantifier ces modifications.…”

Section: -Introductionunclassified

Analyse d'impacts d'un barrage sur le régime hydrologique de la rivière Matawin (Québec, Canada)

Assani¹,

Buffin‐Bélanger²,

Roy³

2005

rseau

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Malgré la présence de nombreux barrages au Québec, peu d'études ont été consacrées à l'analyse des impacts de ces ouvrages sur les régimes hydrologiques des cours d'eau. La présente note a pour but d'analyser les impacts d'un barrage sur le régime hydrologique de la rivière Matawin en comparant le régime hydrologique de la rivière en amont (1390 km2) et en aval (4070 km2) du barrage pendant une période de 60 ans (1930-1990) et sur trois échelles temporelles distinctes. A l'échelle interannuelle, l'influence du barrage se manifeste par une persistance plus marquée des effets des épisodes humides ou secs ainsi qu'une hausse ou une baisse des débits moyens annuels respectivement durant ces périodes. Mais cette succession et cette persistance n'ont pas affecté significativement la stationnarité de la série hydrologique. Aux échelles mensuelles et saisonnière, l'influence du barrage se manifeste par une inversion du régime hydrologique caractérisée par une hausse des débits hivernaux et une baisse des débits printaniers. Cette influence se traduit aussi par une baisse significative du débit maximum mensuel mais une hausse du débit minimum mensuel. Il en résulte une diminution du coefficient d'immodération. A l'échelle journalière, le barrage modifie la période d'occurrence des débits extrêmes minimums et maximums. Il provoque la diminution significative des débits extrêmes minimums et maximums. Mais l'écrêtement des crues est modéré pour les débits de récurrence=10 ans. L'impact le plus significatif du barrage de Matawin est sans nul doute l'inversion du régime hydrologique dont les conséquences morphologiques et biologiques ne sont pas encore documentées dans la littérature scientifique canadienne. Cette inversion résulte du faible écoulement hivernal et d'une forte production de l'énergie électrique pendant la saison froide.Few studies have characterized the effect of dams on the hydrologic regime of rivers in Quebec. This is rather strange given the large number of hydroelectric dams that have been constructed in the province. To shed some light on the environmental impact of these dams, this paper aims at describing and quantifying the effect of the Matawin River dam on the hydrologic regime of the river on an annual, seasonal and daily basis. The Matawin River is located north of the St-Lawrence River and is a tributary of the St-Maurice River. The Matawin dam was built in 1929 by Shawinigan Water and Power Co. mainly to supply the Gabelle hydroelectric dam on the Saint-Maurice River. The dam is 26 m high and the storage capacity of the reservoir is 348,000,000 m3 when full. The catchment area of the dam is 4070 km2.To assess the effect of the dam, we used various statistical methods to compare discharge time series over 60 years as measured at two gauging stations on the river. One of the stations is located upstream whereas the other one is located downstream from the Matawin dam. The upstream drainage basin covers an area of 1390 km2. No major tributaries are found between the two gauging stations, thus allowi...

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“…However, dam construction alters river flow and may increase pollution discharge into river systems. These changes often contribute to rivers running dry, sedimentation, the deterioration of environmental quality, and the decrease in biodiversity (Petts 1979;Topping et al 2000; Kileshye et al 2006;Ligon et al 1995;Jansson et al 2000;Ewa and Grazyna 2002). Research on new modes of dam and floodgate operation, which increase the positive effects while decreasing the negative effects, is a major goal of dam and floodgate management.…”

Section: Introductionmentioning

confidence: 99%

Water quantity and quality optimization modeling of dams operation based on SWAT in Wenyu River Catchment, China

Zhang

Xia

Chen

et al. 2010

Environ Monit Assess

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Water quantity and quality joint operation is a new mode in the present dams' operation research. It has become a hot topic in governmental efforts toward integrated basin improvement. This paper coupled a water quantity and quality joint operation model (QCmode) and genetic algorithm with Soil and Water Assessment Tool (SWAT). Together, these tools were used to explore a reasonable operation of dams and floodgates at the basin scale. Wenyu River Catchment, a key area in Beijing, was selected as the case study. Results showed that the couThese authors contributed equally to this work. pled water quantity and quality model of Wenyu River Catchment more realistically simulates the process of water quantity and quality control by dams and floodgates. This integrated model provides the foundation for research of water quantity and quality optimization on dam operation in Wenyu River Catchment. The results of this modeling also suggest that current water quality of Wenyu River will improve following the implementation of the optimized operation of the main dams and floodgates. By pollution control and water quantity and quality joint operation of dams and floodgates, water quality of Wenyu river will change significantly, and the available water resources will increase by 134%, 32%, 17%, and 82% at the downstream sites of Sha River Reservoir, Lutong Floodgate, Xinpu Floodgate, and Weigou Floodgate, respectively. The water quantity and quality joint operation of dams will play an active role in improving water quality and water use efficiency in Wenyu River Basin. The research will provide the technical support for water pollution control and ecological restoration in Wenyu River Catchment and could be applied to other basins with large number of dams. Its application to the Wenyu River Catchment has a great significance for the sustainable economic development of Beijing City.

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Complex response of river channel morphology subsequent to reservoir construction

Cited by 282 publications

References 29 publications

Morphological response to river engineering and management in alluvial channels in Italy

Morphological response to river engineering and management in alluvial channels in Italy

Analyse d'impacts d'un barrage sur le régime hydrologique de la rivière Matawin (Québec, Canada)

Water quantity and quality optimization modeling of dams operation based on SWAT in Wenyu River Catchment, China

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