Hydrodynamic simulations of physical aquatic habitat availability for Pallid Sturgeon in the Lower Missouri River, at Yankton, South Dakota, Kenslers Bend, Nebraska, Little Sioux, Iowa, and Miami, Missouri, 2006-07

Jacobson, Robert B.; Johnson, H. D.; Dietsch, Benjamin J.

doi:10.3133/sir20095058

Cited by 12 publications

(12 citation statements)

References 49 publications

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“…The kinetic energy gradient is defined as where U is depth‐averaged velocity magnitude (m/s), and are the unit vectors in the streamwise and cross‐stream directions, and ∂ s and ∂ n are the distance between nodes in the streamwise and cross‐stream directions. Crowder and Diplas [2000] mapped only the cross‐stream ( n ) component of KEG, and Jacobson et al [2009] plotted only the streamwise ( s ) component of KEG, though gradients in kinetic energy are likely to be large in both the streamwise ( s ) and cross‐stream ( n ) directions, particularly in curved channels. Therefore, we calculate the absolute magnitude of the complete KEG in the s ‐ n coordinate system as defined by .…”

Section: Methodsmentioning

confidence: 99%

“…In a study of fish behavior in complex flows, Liao [2007] documented the important influence of velocity gradients and vortices on fish behavior and habitat choice. The vorticity metric has been used to identify low‐velocity zones along channel margins and in shallow water habitats [ Jacobson et al , 2009]. Jacobson et al [2009] observed that migrating adult sturgeon were found disproportionately on the edges of the channel in areas of high energy dissipation, which were defined as zones of fluid shear, flow separation, and turbulence.…”

Section: Introductionmentioning

confidence: 99%

“…The vorticity metric has been used to identify low‐velocity zones along channel margins and in shallow water habitats [ Jacobson et al , 2009]. Jacobson et al [2009] observed that migrating adult sturgeon were found disproportionately on the edges of the channel in areas of high energy dissipation, which were defined as zones of fluid shear, flow separation, and turbulence. Jacobson et al [2009] found that the low‐velocity refuge zones and shallow water margin habitat used by sturgeon could be mapped spatially using the spatial gradient in velocity.…”

Section: Introductionmentioning

confidence: 99%

“… Jacobson et al [2009] observed that migrating adult sturgeon were found disproportionately on the edges of the channel in areas of high energy dissipation, which were defined as zones of fluid shear, flow separation, and turbulence. Jacobson et al [2009] found that the low‐velocity refuge zones and shallow water margin habitat used by sturgeon could be mapped spatially using the spatial gradient in velocity. Because vorticity is defined by the spatial gradients in the flow field and identifies areas of low velocity that are adjacent to areas of higher velocity, Jacobson et al [2009] observed that this flow metric could in turn be used to map the sturgeon habitats along the channel margins.…”

Section: Introductionmentioning

confidence: 99%

“… Jacobson et al [2009] found that the low‐velocity refuge zones and shallow water margin habitat used by sturgeon could be mapped spatially using the spatial gradient in velocity. Because vorticity is defined by the spatial gradients in the flow field and identifies areas of low velocity that are adjacent to areas of higher velocity, Jacobson et al [2009] observed that this flow metric could in turn be used to map the sturgeon habitats along the channel margins. In addition, measures of flow turbulence, such as turbulent kinetic energy, have also been found to correlate well with salmonid density [ Smith et al , 2006].…”

Section: Introductionmentioning

confidence: 99%

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Channel dynamics and habitat development in a meandering, gravel bed river

Harrison

Legleiter

Wydzga

et al. 2011

Water Resources Research

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[1] We investigated how channel morphology, flow complexity, and habitat characteristics in a meandering gravel bed river evolved over time from a simple, reconfigured initial condition. Using a time series of topographic data, we measured rates of channel migration and morphologic change, documented patterns of sediment storage, and estimated rates of sediment supply. We constructed, calibrated, and validated hydrodynamic models to quantify how the evolving morphology influenced hydraulic conditions, flow complexity, and habitat suitability for Chinook salmon spawning and rearing. For a series of meander bends with constant curvature, similar bank materials, and an identical flow history, sediment supply and bar storage directly influenced channel migration rates. Habitat modeling indicated that the availability of Chinook salmon spawning habitat increased over time, whereas the majority of the reach continues to provide only low-to medium-quality rearing habitat for juvenile salmonids, primarily because of a lack of low-velocity refuge zones. However, other metrics of flow complexity indicate that areas of favorable flow conditions gradually expanded as point bars developed along the inner bank of each bend. These results indicate that although sediment supply can stimulate channel change and diversify river morphology, which acts to promote flow complexity and provide spawning habitat, these sediment-driven morphological changes might not create bioenergetically favorable habitat for juvenile salmonids.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Channel dynamics and habitat development in a meandering, gravel bed river

Harrison

Legleiter

Wydzga

et al. 2011

Water Resources Research

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Restoring in‐stream habitat in urban catchments: Modify flow or the channel?

et al. 2018

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Urban streams have almost universally altered physical habitat conditions due to excess stormwater run‐off. This includes changes to in‐channel hydraulics and channel morphology. Restoration of in‐channel habitat has two main levers: address the hydrology or channel morphology. Both variables impact in‐stream habitat, but understanding the relative role of hydrologic and morphologic change remains a challenge. This study uses two‐dimensional hydraulic modelling to examine the relative roles of flow and channel morphology in setting hydraulic conditions. We investigated four test scenarios involving the combinations of urban versus natural hydrology and urban versus natural channel morphology. The analysis investigated three ecologically relevant hydraulics characteristics: bed mobilization, retentive habitat, and floodplain inundation, using Shields stress, shallow slow‐water habitat (SSWH) area, and floodplain inundation area hydraulic metrics, respectively. The results indicate substantial differences in hydraulic conditions between the two reaches. The urban reach showed increased bed mobility potential and SSWH availability plummeted as flow increased, whereas the natural channel showed a relatively stable bed with substantially more SSWH at most flows. Floodplain inundation frequency was low in the urban channel with decreased duration. Scenarios examined suggest that hydraulic conditions are highly sensitive to channel morphology relative to flow regime. This suggests that once channel form has been degraded, mitigating urbanization impacts on flow regime cannot maintain “natural” channel hydraulics. Management approaches therefore must protect channel morphology from change. Where the channel has already been fundamentally altered, opportunities for channel morphology rehabilitation need to be considered.

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Lake sturgeon seasonal movements in regulated and unregulated Missouri River tributaries

et al. 2021

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Spatio‐temporal movement patterns of aquatic organisms drive many ecological processes. However, dams block migrations and alter the hydrologic and thermal regimes influencing movement behaviour of freshwater fishes. In North America, many recovering southern Lake Sturgeon populations occur in rivers with hydroelectric dams, but few studies have examined the impact of hydrologic alteration on their seasonal movements. We conducted a 3‐year telemetry study of 96 adult and subadult Lake Sturgeon to compare their migratory responses to temperature and hydrology in adjacent regulated and unregulated tributaries of the Missouri River. Many other populations of Lake Sturgeon use tributaries primarily for spring spawning; however, in our study, Lake Sturgeon used Missouri River tributaries during 78% of the year. Differences in river size, hydrologic and thermal regimes in the regulated Osage River may have contributed to the greater year‐round residency, later initiation, more frequent directional changes and longer duration of spring migrations compared to the unregulated Gasconade River. Lake Sturgeon made spring upstream migrations at temperatures of 13–19°C and elevated discharges in both rivers. However, Osage River migrants responded less to changes in discharge or temperature during spring migrations, especially those that overwintered at upstream locations. Fall tributary migrations occurred in the Osage River at rising or high discharges but were uncommon in the Gasconade River. Our identification of the influences of abiotic variables on the timing, duration and extent of Lake Sturgeon seasonal migrations can help guide management of habitat and hydrology in regulated rivers to recover migratory fishes globally.

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Hydrodynamic simulations of physical aquatic habitat availability for Pallid Sturgeon in the Lower Missouri River, at Yankton, South Dakota, Kenslers Bend, Nebraska, Little Sioux, Iowa, and Miami, Missouri, 2006-07

Abstract: Front cover: Examples of derivative hydraulic habitat metrics at Little Sioux reach: Froude number and velocity slope.

Cited by 12 publications

References 49 publications

Channel dynamics and habitat development in a meandering, gravel bed river

Channel dynamics and habitat development in a meandering, gravel bed river

Restoring in‐stream habitat in urban catchments: Modify flow or the channel?

Lake sturgeon seasonal movements in regulated and unregulated Missouri River tributaries

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