Ecological hydrograph based on Schizothorax chongi habitat conservation in the dewatered river channel between Jinping cascaded dams

Li, Ruonan; Chen, Qiuwen; Duan, Changqun

doi:10.1007/s11431-011-4614-7

Cited by 25 publications

(23 citation statements)

References 24 publications

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“…Flow is used as the input variable for hydrodynamic and water quality models to predict the physical and chemical impacts such as a change in water depth, velocity and other variables that are driven by flow regulations [25,47,112,113]. In some cases, outputs from water quality or hydrodynamic models have been used as the input variables to predict the impact of dams on habitat suitability.…”

Section: Model Processes and Outputsmentioning

confidence: 99%

“…Boavida et al [47] have illustrated that hydropeaking impact is strongly dependent on river morphology in fish habitat simulations. Furthermore, Li et al [113] suggested that the variation of hydrologic frequency, as well as the maximum and minimum amount of water release from dams due to hydropeaking, should be taken into account in model development. In many cases, there will be an overlapping effect of general river regulation and hydropeaking impacts; thus, stressors are difficult to disentangle [47].…”

Section: Weaknessesmentioning

confidence: 99%

“…As a result, details of other hydrological processes could not be inferred. Examples of relatively simple ecological models were developed by Garcia et al [18] and Li et al [113] wherein a limited number of variables was used to predict biotic responses. However, variables not included in the model may have a relevant influence on the biotic responses.…”

Section: Weaknessesmentioning

confidence: 99%

“…The development of advanced environmental monitoring technologies could result in datasets with a large number of variables with high quality in order to deal with data scarcity and variability when developing models [113]. Many European countries have established environmental monitoring networks to report on their river water quality.…”

Section: Opportunitiesmentioning

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: Model Processes and Outputsmentioning

confidence: 99%

Section: Weaknessesmentioning

confidence: 99%

Section: Weaknessesmentioning

confidence: 99%

Section: Opportunitiesmentioning

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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“…The operation of the JP cascaded reservoirs would alter the natural hydrological regime in the Dahewan Reach substantially, and thus, impose severe impacts on the river ecosystem, especially on the fish habitat (Richter et al, 1997;Li et al, 2011). To protect the river ecosystem, conventional operations need to be adapted to account for ecological flow requirements (Jager and Rose, 2003;Renöfält et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Ecologically-friendly operation scheme for the Jinping cascaded reservoirs in the Yalongjiang River, China

Duan

Chen

et al. 2013

Front. Earth Sci.

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Ecologically-friendly reservoir operation procedures aim to conserve key ecosystem properties in the rivers, while minimizing the sacrifice of socioeconomic interests. This study focused on the Jinping cascaded reservoirs as a case study. An optimization model was developed to explore a balance between the ecological flow requirement (EFR) of a target fish species (Schizothorax chongi) in the dewatered natural channel section, and annual power production. The EFR for the channel was determined by the Tennant method and a fish habitat model, respectively. The optimization model was solved by using an adaptive real-coded genetic algorithm. Several operation scenarios corresponding to the ecological flow series were evaluated using the optimization model. Through comparisons, an optimal operational scheme, which combines relatively low power production loss with a preferred ecological flow regime in the dewatered channel, is proposed for the cascaded reservoirs. Under the recommended scheme, the discharge into the Dahewan river reach in the dry season ranges from 36 to 50 m 3 /s. This will enable at least 50% of the target fish habitats in the channel to be conserved, at a cost of only 2.5% annual power production loss. The study demonstrates that the use of EFRs is an efficient approach to the optimization of reservoir operation in an ecologically friendly way. Similar modeling, for other important fish species and ecosystem functions, supplemented by field validation of results, is needed in order to secure the long-term conservation of the affected river ecosystem.

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Determination of daily eco‐hydrographs by the fish spawning habitat suitability model and application to reservoir eco‐operation

Chen

Han

et al. 2015

Ecohydrology

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Global conflict over water has become increasingly problematic. To meet water demands for economic growth in China, a large number of hydro-projects have been developed and operated, which have significantly altered the natural hydrological regime of many rivers and imposed profound impact on aquatic ecosystems. Conservation of appropriate ecological flow is essential to balance river ecosystem health and economic development. We proposed an innovative method for river eco-hydrograph determination based on the protection of fish spawning habitat. An integrated hydro-environmental-habitat model was developed and applied in de-watered channels in the middle of Yalong River, China, where water was diverted for hydropower generation. Schizothorax chongi (S. chongi), the dominant and commercial indigenous fish, was selected as the target species. Different from previous research, the impacts of fragmentation and water level variation on fish habitat were analysed in the spawning period. Eco-hydrographs for different preservation levels of S. chongi spawning habitat were estimated using the developed model, and the suitable one was recommended. Compared with traditional hydrologic and hydraulic methods, the improved habitat method not only determined the ecological water demand of the species more meaningfully but also increased water use efficiency.

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Ecological hydrograph based on Schizothorax chongi habitat conservation in the dewatered river channel between Jinping cascaded dams

Cited by 25 publications

References 24 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

Ecologically-friendly operation scheme for the Jinping cascaded reservoirs in the Yalongjiang River, China

Determination of daily eco‐hydrographs by the fish spawning habitat suitability model and application to reservoir eco‐operation

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