Impact of the Gezhouba and Three Gorges Dams on habitat suitability of carps in the Yangtze River

Yi, Yujun; Wang, Zhaoyin; Yang, Zhifeng

doi:10.1016/j.jhydrol.2010.04.018

Cited by 142 publications

(93 citation statements)

References 23 publications

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“…In addition, dams can alter periphyton biomass [10], provoke changed phytoplankton densities [60] and cause algal blooms [61]. Moreover, hydropower dams affect the taxonomic and trophic structure of fish communities and can cause a reduction of fish species richness [62,63] and abundance [64,65].…”

Section: Statementioning

confidence: 99%

“…As phytoplankton, zooplankton and invertebrates are important food sources for fish and other vertebrates, changes in food availability affect fish growth and survival [55], as well as the reproduction of key species [26]. Moreover, modifications of physical-chemical water quality may deteriorate spawning grounds and nursery areas [64], leading to biodiversity loss [71], and alter species interaction [72] and ecosystem processes [73].…”

Section: Impactsmentioning

confidence: 99%

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Modelling Tools to Analyze and Assess the Ecological Impact of Hydropower Dams

Nguyen

Everaert

Boets

et al. 2018

Water

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Abstract:We critically analyzed a set of ecological models that are used to assess the impact of hydropower dams on water quality and habitat suitability for biological communities. After a literature search, we developed an integrated conceptual model that illustrates the linkages between the main input variables, model approaches, the output variables and biotic-abiotic interactions in the ecosystems related to hydropower dams. We found that variations in water flow and water depth coupled with increased nutrient availability are major variables that contribute to structural and functional ecosystem changes. We also found that ecological models are an important tool to assess the impact of hydropower dams. For instance, model simulation of different scenarios (e.g., with and without the dam, different operation methods) can analyze and predict the related ecosystem shifts. However, one of the remaining shortcomings of these models is the limited capacity to separate dam-related impacts from other anthropogenic influences (e.g., agriculture, urbanization). Moreover, collecting sufficient high-quality data to increase the statistical power remains a challenge. The severely altered conditions (e.g., generation of very deep lakes) also lead to difficulties for standardized data collection. We see future opportunities in the integration of models to improve the understanding of the different processes affected by hydropower dam development and operation, as well as the use of remote sensing methods for data collection.

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Section: Statementioning

confidence: 99%

Section: Impactsmentioning

confidence: 99%

Modelling Tools to Analyze and Assess the Ecological Impact of Hydropower Dams

Nguyen

Everaert

Boets

et al. 2018

Water

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“…It is possible to find models that use different techniques, such as diffuse, multivariate and fuzzy logic approaches, and that allow the inclusion of the interaction between ecological variables (BOAVIDA et al, 2014;BENJANKAR et al, 2012;DARAIO et al, 2010;SILVA, 2010), including water quality parameters, such as temperatures, dissolved oxygen levels, biochemical oxygen demands and nutrients (SOUZA et al, 2014;MARSILI-LIBELLI et al, 2013;AYLLÓN et al, 2012b), among other potentialities. Such models vary in complexity, from one-dimensional models (GOTO et al, 2015) to those based on two- (YI et al, 2010) or three-dimensional hydraulic equations (DARAIO et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

One- And Two-Dimensional Ecohydraulic Modeling of Formoso River (Mg)

et al. 2016

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ABSTRACT:The objective of this study was to compare ecohydrological simulations from a onedimensional model (PHABSIM -Physical Habitat Simulation System) and a two-dimensional model (River2D) in order to indicate a reliable tool that could be used to determine public policies for the sustainable management of the water resources of the Formoso River basin (MG). The results from the calibration of hydraulic variables, namely, water depth and velocity, as well as habitat predictions for three fish species of the river were compared. The results showed that River2D was best suited to simulate ecohydrological features for the studied river stretch. Although PHABSIM presented a better fit of the hydraulic variables at the calibration process, the use of only three monitoring cross sections to compose the biotic model database compromised its habitat modeling. PHABSIM model was not able to accurately assess the actual characteristics of the physical habitat in the segments of the river located between the monitoring cross sections.

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“…Nikoo et al (2013) developed an integrated water quantity-quality model for optimal water allocation in the reservoir-river basin that considered water supply and quality as targets in addition to hydrologic, water quality, and water demand uncertainties. To explore the impact on habitat suitability of carp in the Yangtze River following the construction of the Gezhouba and the Three Gorges dams, a habitat suitability index model that considered the spawning characteristics of the four main carp species was established and employed by Yi et al (2010). Cai et al (2009Cai et al ( , 2010 identified optimal strategies in the planning of energy and flood management aiming at fish protection and pursuing eco-environmentally friendly operations.…”

Section: The Previous Studiesmentioning

confidence: 99%

Eco-environmentally friendly operational regulation: an effective strategy to diminish the TDG supersaturation of reservoirs

Feng

Liang

et al. 2014

Hydrol. Earth Syst. Sci.

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Abstract. The presence of elevated total dissolved gas (TDG) downstream of a spillway may result in an increased incidence of gas bubble disease in fish. Supersaturated TDG is transported and dissipated more slowly in reservoirs than in natural rivers because of a higher water depth and lower turbulence and thus endangers fish. This paper presents the operational regulations concerning the mitigation of the TDG supersaturation impact on fish in the Bala Reservoir on the Zumuzu River. The paper includes the joint operations of the upstream and downstream power stations. A laterally averaged two-dimensional model is employed to simulate the TDG transportation and dissipation in the Bala Reservoir in addition to the hydrodynamics and water temperature. According to a comparison of the simulation results of different operational scenarios, this paper suggests a regulation scheme. With respect to the upstream power station, the adoption of an interval-discharge pattern instead of a continuous-discharge pattern is recommended to minimize the negative effect on the reservoir caused by supersaturated TDG. With respect to the downstream power station, the adoption of a surface tunnel rather than a bottom tunnel is recommended as a release structure. This paper is a reference for the eco-environmentally friendly operation of large and deep reservoirs.

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Impact of the Gezhouba and Three Gorges Dams on habitat suitability of carps in the Yangtze River

Cited by 142 publications

References 23 publications

Modelling Tools to Analyze and Assess the Ecological Impact of Hydropower Dams

Modelling Tools to Analyze and Assess the Ecological Impact of Hydropower Dams

One- And Two-Dimensional Ecohydraulic Modeling of Formoso River (Mg)

Eco-environmentally friendly operational regulation: an effective strategy to diminish the TDG supersaturation of reservoirs

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