Bedform morphology of salmon spawning areas in a large gravel-bed river

Hanrahan, Timothy P.

doi:10.1016/j.geomorph.2006.09.017

Cited by 41 publications

(42 citation statements)

References 32 publications

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“…In the rivers of the northwestern USA, the threatened specie of Chinook salmon (Oncorhynchus tschawytscha) is a primary management concern. These fish prefer to build their egg nests and spawn on convexities in the channel (riffles) and consequently the form of the vertical profile of a stream bed is an important habitat variable for that life stage [30,31]. As an example of the application of this analytical technique, the wavelet transform was used to investigate spawning habitat distribution in EAARL data over the same 22 km-long segment of Bear Valley Creek discussed regarding detrending methods in Section 4.1.…”

Section: Beyond Maps: Frequency Domain Analysesmentioning

confidence: 99%

Remote Sensing of Channels and Riparian Zones with a Narrow-Beam Aquatic-Terrestrial LIDAR

et al. 2009

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Abstract:The high-resolution Experimental Advanced Airborne Research LIDAR (EAARL) is a new technology for cross-environment surveys of channels and floodplains. EAARL measurements of basic channel geometry, such as wetted cross-sectional area, are within a few percent of those from control field surveys. The largest channel mapping errors are along stream banks. The LIDAR data adequately support 1D and 2D computational fluid dynamics models and frequency domain analyses by wavelet transforms. Further work is needed to establish the stream monitoring capability of the EAARL and the range of water quality conditions in which this sensor will accurately map river bathymetry.

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Section: Beyond Maps: Frequency Domain Analysesmentioning

confidence: 99%

Remote Sensing of Channels and Riparian Zones with a Narrow-Beam Aquatic-Terrestrial LIDAR

et al. 2009

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“…If fish begin to spawn at Groves et al one site earlier than at a second adjacent site, the habitat alterations created by the first spawners might subsequently and disproportionately draw fish to the first site (e.g., for brook trout Salvelinus fontinalis and brown trout Salmo trutta; Essington et al 1998). In addition to social spawning, covariates that might influence inter-annual variation in spawning site selection include water depth, water velocity, and geomorphology (e.g., Geist and Dauble 1998;Groves and Chandler 1999;Hanrahan 2007). With a covariate that strongly correlated with the redd counts at each site, the PPS method could be modified to produce consistently unbiased, and much more efficient estimates (i.e., require fewer site surveys than needed for STRS).…”

Section: Discussionmentioning

confidence: 99%

Testing unmanned aircraft systems for salmon spawning surveys

Groves¹,

Alcorn²,

Wiest

et al. 2017

FACETS

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Unmanned aircraft systems (UASs) were tested for counting Chinook salmon (Oncorhynchus tshawytscha) redds as a more accurate, safer alternative to manned helicopter flights. Counting redds from the helicopter was less expensive and time consuming, but of the total redds counted at selected sites with a UAS, an average (± SD) of only 77% ± 14% was counted from the helicopter. A river-wide census of redds was not possible with a UAS because the study area was too large for the single field crew to survey. Simulation analyses were used to compare stratified random sampling (STRS) and sampling proportional to size (PPS) for estimating annual total redd counts from data collected with a UAS. The STRS estimates were more accurate and precise, whereas the PPS estimates, though biased, had 95% CIs that included the observed redd count more frequently. We strongly recommend that researchers conduct simulation analyses to evaluate alternative survey sampling methods if they are considering replacing census counts made from manned aircraft with counts estimated from data collected with a UAS. We conclude that UAS application reduces the risk inherent to manned aircraft flights, but the reduction in risk can come at the cost of estimates of population parameters that can sometimes be inaccurate and lack 95% CI coverage.

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“…While the Ice Harbor study ar contains more potential fall Chinook salmon spawning habitat with water velocity within the optimal range of 0.7-1.5 m s -1 , nearly this entire higher velocity habitat is located within the navigation channel The fall Chinook salmon spawning habitat suitability of these higher-velocity areas is compromised, as the navigation channel contains deep-water habitat beyond the optimal water depths and lacks the longitudinal bedforms along the thalweg typically associated with fall Chinook salmon spawning (Hanrahan 2007a).…”

Section: Discussionmentioning

confidence: 99%

“…Wald-Wolfowitz runs test was used to test the null hypothesis that thalweg points in spawning and non-spawning areas had the same mean RPI (α = 0.05). Similar channel morphology data from other fall Chinook salmon spawning habitat reference locations in the Columbia and Snake rivers were used for comparative purposes (Geist et al 2006;Hanrahan 2007a). …”

Section: Channel Morphologymentioning

confidence: 99%

Effects of Hydroelectric Dam Operations on the Restoration Potential of Snake River Fall Chinook Salmon (Oncorhynchus tshawytscha) Spawning Habitat Final Report, October 2005 - September 2007.

Hanrahan¹,

Richmond²,

Arntzen

2007

Self Cite

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SummaryThis report describes research conducted by the Pacific Northwest National Laboratory for the Bonneville Power Administration (BPA) as part of the Fish and Wildlife Program directed by the Northwest Power and Conservation Council. The study evaluated the restoration potential of Snake River fall Chinook salmon spawning habitat within the impounded lower Snake River. The objective of the research was to determine if hydroelectric dam operations could be modified, within existing system constraints (e.g., minimum to normal pool levels; without partial removal of a dam structure), to increase the amount of available fall Chinook salmon spawning habitat in the lower Snake River.Empirical and modeled physical habitat data were used to compare potential fall Chinook salmon spawning habitat in the Snake River, under current and modified dam operations, with the analogous physical characteristics of an existing fall Chinook salmon spawning area in the Columbia River. The two Snake River study areas included the Ice Harbor Dam tailrace downstream to the Highway 12 bridge and the Lower Granite Dam tailrace downstream approximately 12 river kilometers. These areas represent tailwater habitat (i.e., riverine segments extending from a dam downstream to the backwater influence from the next dam downstream). We used a reference site, indicative of current fall Chinook salmon spawning areas in tailwater habitat, against which to compare the physical characteristics of each study site. The reference site for tailwater habitats was the section extending downstream from the Wanapum Dam tailrace on the Columbia River. Fall Chinook salmon spawning habitat use data, including water depth, velocity, substrate size and channelbed slope, from the Wanapum reference area were used to define spawning habitat suitability based on these variables. Fall Chinook salmon spawning habitat suitability of the Snake River study areas was estimated by applying the Wanapum reference reach habitat suitability criteria to measured and modeled habitat data from the Snake River study areas. Channel morphology data from the Wanapum reference reach and the Snake River study areas were evaluated to identify geomorphically suitable fall Chinook salmon spawning habitat.The results of this study indicate that a majority of the Ice Harbor and Lower Granite study areas contain suitable fall Chinook salmon spawning habitat under existing hydrosystem operations. However, a large majority of the currently available fall Chinook salmon spawning habitat in the Ice Harbor and Lower Granite study areas is of low quality. The potential for increasing, through modifications to hydrosystem operations (i.e., minimum pool elevation of the next downstream dam), the quantity or quality of fall Chinook salmon spawning habitat appears to be limited. Estimates of the amount of potential fall Chinook salmon spawning habitat in the Ice Harbor study area decreased as the McNary Dam forebay elevation was lowered from normal to minimum pool elevation. Estimates of the amount of...

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Bedform morphology of salmon spawning areas in a large gravel-bed river

Cited by 41 publications

References 32 publications

Remote Sensing of Channels and Riparian Zones with a Narrow-Beam Aquatic-Terrestrial LIDAR

Remote Sensing of Channels and Riparian Zones with a Narrow-Beam Aquatic-Terrestrial LIDAR

Testing unmanned aircraft systems for salmon spawning surveys

Effects of Hydroelectric Dam Operations on the Restoration Potential of Snake River Fall Chinook Salmon (Oncorhynchus tshawytscha) Spawning Habitat Final Report, October 2005 - September 2007.

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