Impacts of Channel Morphodynamics on Fish Habitat Utilization

Parsapour-Moghaddam, Parna; Brennan, Colin; Rennie, Colin D.; Elvidge, Chris K.; Cooke, Steven J.

doi:10.1007/s00267-019-01197-0

Cited by 12 publications

(7 citation statements)

References 51 publications

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“…The bankfull level was estimated in the field where an abrupt change in cross slope and vegetation cover were observed. The bankfull depth is approximately 1.1 m. Parsapour‐moghaddam et al () measured a flow of 1.368 m 3 /s, thalweg depth of 1.1 m, and estimated this flow to be just below bankfull. Therefore, the bankfull discharge is approximately 1.4 m 3 /s.…”

Section: Discussionmentioning

confidence: 99%

“…Flow data were collected at WC4 in 2014 and 2015 as part of a sediment erodibility study (Parsapour‐moghaddam et al, ; Rennie, ). Those five flows were augmented with three more measurements in 2016 and 2017.…”

Section: Methodsmentioning

confidence: 99%

“…The term semi‐alluvial recognizes that eroded clay material may be transported along the bed for a time and may temporarily be deposited within the parent channel but will eventually enter suspension and be transported out of the channel. We build on previous work assessing the existing state of Watts Creek (Figure ) resulting from ongoing effects of past land‐use changes (agricultural and urban) on channel stability and fish habitat utilization (Maarschalk‐Bliss, ; Parsapour‐moghaddam, Rennie, Midwood, Cvetkovic, & Cooke, ; Rennie, ; Salem, Rennie, & Custodio, ). The outputs from of the fourth version of the Canadian Regional Climate Model (CanRCM4) are downscaled and used to quantify the potential effects of climate change on future precipitation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Continuous prediction of clay‐bed stream erosion in response to climate model output for a small urban watershed

Brennan

Parsapour-Moghaddam

Rennie

et al. 2018

Hydrological Processes

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The response of the semi-alluvial clay-bed Watts Creek is assessed subject to climate change.Climate impacts are expected to have regional variability, and few studies have assessed the impacts of future climate in a small urban watershed. The 21-km 2 watershed located in Ottawa, Ontario, Canada, is highly urbanized (68%) and agricultural (20%) with limited forest cover (12%).Continuous simulations were performed using the SWMHYMO lumped hydrologic modelling platform for the open water year, excluding spring freshet (April 1 to October 31). A shear stress exceedance and stream power erosion routine was added to the platform to calculate erosion potential. To account for uncertainty in the collected data, 9 different field datasets were used to calibrate the model, each leading to a distinct set of calibrated parameter values. The difference between the datasets lies in the choice of the rating curves and calibration period.The 2041-2080 precipitation outputs of the 4th version of the Canadian Regional Climate Model (CanRCM4) ran under representative concentration pathways (RCPs) 4.5 and 8.5 at the MacDonald Cartier International Airport were downscaled using quantile matching and then used as input to the continuous hydrologic model. For each set of calibrated parameters, a cumulative effective work index based on the reach-averaged shear stress was calculated for Watts Creek using both the historic and projected future (2041-2080) flows, using a bed material critical shear stress for entrainment of 3.7 Pa. These results suggest an increase of 75% (respectively 139%) under RCP4.5 (respectively RCP8.5) in cumulative effective work index compared with historic conditions for the average measured bed strength. The work index increase is driven by an increased occurrence of above-threshold events and, more importantly, by the increased frequency of large events. The predicted flow regime under climate change would significantly alter the erosion potential and stability of Watts Creek.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Continuous prediction of clay‐bed stream erosion in response to climate model output for a small urban watershed

Brennan

Parsapour-Moghaddam

Rennie

et al. 2018

Hydrological Processes

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“…Those problems in the tailrace have been mitigated by the use of a fish screen during the turbine stop/startup procedures, together with regular fish monitoring immediately downstream of the dam (Suzuki et al, 2017). Finally, 2D and 3D hydrodynamic models have been used to evaluate fish habitats (Parsapour-Moghaddam et al, 2019) and are a potential tool for evaluating dam impacts on migratory fish movement (Gisen et al, 2017) despite uncertainties inherent in modeling (Gard, 2009;Boavida et al, 2013). The 2D models can be created and ran faster than 3D models though the latter has the ability to model vertical nearbed flows (Kasvi et al, 2015) and turbulence (Alvarez et al, 2017), which has already been described as an important hydraulic variable linked to fish swimming capacity (Lacey et al, 2012).…”

Section: Prochilodus Costatusmentioning

confidence: 99%

“…Therefore, the analysis of hydrodynamic flow in tailraces and areas located just downstream of HPPs is important in tropical areas for purposes of informing the mitigation actions or even the planning of HPP decommissioning. Several studies have applied numerical models in 2D (Rodriguez et al, 2004;Alho & Mäkinen, 2010;Kasvi et al, 2015) and 3D (Kasvi et al, 2015;Alvarez et al, 2017;Parsapour-Moghaddam & Rennie, 2018;Parsapour-Moghaddam et al, 2019) to simulate the flow in river reaches and also in areas located close to dams (Gisen et al, 2017). Due to the elevated computational cost of the 3D model in terms of calibration, these models are now widely applied to predict the hydrodynamics of small spacetime domains (Parsapour-Moghaddam & Rennie, 2018), while 2D models are more accessible over large distances because they have a low computational cost (Yi et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Downstream alterations on hydrodynamic fields by hydropower plant operations: implications for upstream fish migration

2020

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This study identifies hydrodynamic alterations in flow downstream of a dam that are related to hydropower plant (HPP) operation and that might attract Neotropical potamodromous fish to unsafe places in the tailrace during their reproductive migration. Our hypotheses are (1) the hydrodynamic flow in the tailrace presents conditions that are strong attractive for fish than those found in the downstream reach and (2) there are no velocity barriers preventing the upstream migrant from reaching the tailrace over a wide range of turbine discharge. Two calibrated numerical models were created for the Três Marias HPP (Brazil), using different turbine discharges: (1) a three-dimensional (3D) model of flow in the tailrace and (2) a two-dimensional (2D) model for flow in the 3-km reach downstream of the dam. Resulting flow fields of the Três Marias HPP tailrace have elevated hydraulic strain and velocity homogeneity by as compared to the flow field of the downstream reach. The tailrace velocities are slow for mature individuals of all study species, which may swim from downstream reach to unsafe areas in their sustainable and prolonged mode by available corridors for different turbined discharges.

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Application of a fish habitat model to assess habitat fragmentation using high flow and sediment transport in the Rumei Dam in Lancang River (China)

Yang,

Bao,

Cong

et al. 2023

Ecohydrology

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Dam construction and operation can result in serious disturbances to the downstream flow regime and fluvial process, river morphology and the river's ecological condition worldwide. To understand the effects of discharge and sedimentation on fish habitats and ecosystems, an ecohydraulic approach was applied to one of the mega hydropower schemes in the downstream Lancang River (Tibet). The approach comprised a dam operation module with high flow and sediment transport and the application of a dynamic fish habitat model for assessing habitat fragmentation of two targeted fish species: Schizothorax prenanti (S. prenanti) and Schizothorax davidi (S. davidi). The hydrodynamics of the river system and the assessed fish habitat show a significant impact of dam construction and operation on the downstream riverine ecosystem, in which fish habitats were found rapidly deteriorated with the destruction of feeding and reproductive grounds. To improve fish habitat after dam construction, the sediment supplement was applied to the river and shown to be a useful restoration strategy, which recovers the habitat fragmentation of target fish. Our model not only is useful to predict dam operation impacts on the Lancang River's ecological status but also shows great potential in mitigating hydropower‐induced environmental impacts and developing river conservation guidelines worldwide.

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Impacts of Channel Morphodynamics on Fish Habitat Utilization

Cited by 12 publications

References 51 publications

Continuous prediction of clay‐bed stream erosion in response to climate model output for a small urban watershed

Continuous prediction of clay‐bed stream erosion in response to climate model output for a small urban watershed

Downstream alterations on hydrodynamic fields by hydropower plant operations: implications for upstream fish migration

Application of a fish habitat model to assess habitat fragmentation using high flow and sediment transport in the Rumei Dam in Lancang River (China)

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