Sediment budget for salmonid spawning habitat rehabilitation in a regulated river

Merz, Joseph E.; Pasternack, G. B.; Wheaton, Joseph M.

doi:10.1016/j.geomorph.2005.11.004

Cited by 74 publications

(80 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For the Feshie, a 1 m resolution DEM minimized information loss, while maintaining the detail of bar scale morphology and a computationally effi cient grid size to perform the numerous analyses reported here. Alternative TIN-based differencing schemes do exist and are used in commercial applications like Surfer and Autodesk's Land Desktop and have been used in the literature (Lane et al, 1994;Lane, 1998;Merz et al, 2006). However, to apply the sort of uncertainty analysis used here, would be algorithmically much more complicated and it would be diffi cult to maintain fl exibility for extension in the future.…”

Section: Interpolation Errorsmentioning

confidence: 99%

Accounting for uncertainty in DEMs from repeat topographic surveys: improved sediment budgets

Wheaton

Brasington

Darby

et al. 2009

Earth Surf Processes Landf

Self Cite

887

894

View full text Add to dashboard Cite

Repeat topographic surveys are increasingly becoming more affordable, and possible at higher spatial resolutions and over greater spatial extents. Digital elevation models (DEMs) built from such surveys can be used to produce DEM of Difference (DoD) maps and estimate the net change in storage terms for morphological sediment budgets. While these products are extremely useful for monitoring and geomorphic interpretation, data and model uncertainties render them prone to misinterpretation. Two new methods are presented, which allow for more robust and spatially variable estimation of DEM uncertainties and propagate these forward to evaluate the consequences for estimates of geomorphic change. The fi rst relies on a fuzzy inference system to estimate the spatial variability of elevation uncertainty in individual DEMs while the second approach modifi es this estimate on the basis of the spatial coherence of erosion and deposition units. Both techniques allow for probabilistic representation of uncertainty on a cell-by-cell basis and thresholding of the sediment budget at a user-specifi ed confi dence interval. The application of these new techniques is illustrated with 5 years of high resolution survey data from a 1 km long braided reach of the River Feshie in the Highlands of Scotland. The reach was found to be consistently degradational, with between 570 and 1970 m 3 of net erosion per annum, despite the fact that spatially, deposition covered more surface area than erosion. In the two wetter periods with extensive braid-plain inundation, the uncertainty analysis thresholded at a 95% confi dence interval resulted in a larger percentage (57% for 2004-2005 and 59% for 2006-2007) of volumetric change being excluded from the budget than the drier years (24% for 2003-2004 and 31% for 2005-2006). For these data, the new uncertainty analysis is generally more conservative volumetrically than a standard spatially-uniform minimum level of detection analysis, but also produces more plausible and physically meaningful results. The tools are packaged in a wizard-driven Matlab software application available for download with this paper, and can be calibrated and extended for application to any topographic point cloud (x,y,z).

show abstract

Section: Interpolation Errorsmentioning

confidence: 99%

Accounting for uncertainty in DEMs from repeat topographic surveys: improved sediment budgets

Wheaton

Brasington

Darby

et al. 2009

Earth Surf Processes Landf

Self Cite

887

894

View full text Add to dashboard Cite

show abstract

“…This computation assumed no nontransport 374 mechanisms of volumetric change, previously termed bed deflation or contraction and 375 inflation or dilation (Merz et al, 2006;Marquis and Roy, 2012). In addition, if a raster 376 cell erodes and then fills in between surveys, no change will be detected in that cell: a 377 process known as compensating scour and fill .…”

Section: Sediment Budgeting 371mentioning

confidence: 99%

Valley-scale morphology drives differences in fluvial sediment budgets and incision rates during contrasting flow regimes

Weber

Pasternack

2017

Geomorphology

View full text Add to dashboard Cite

“…Terrestrial surveys using Global Navigation Satellite System (GNSS) rovers or total stations are, e.g., reported by [12,36,37]. Although modern instruments allow rapid acquisition, ground based surveys are restricted to smaller rivers and the density of river bed points is low and inhomogeneous.…”

Section: Related Workmentioning

confidence: 99%

Topo-Bathymetric LiDAR for Monitoring River Morphodynamics and Instream Habitats—A Case Study at the Pielach River

et al. 2015

View full text Add to dashboard Cite

Airborne LiDAR Bathymetry (ALB) has been rapidly evolving in recent years and now allows fluvial topography to be mapped in high resolution (>20 points/m 2 ) and height accuracy (<10 cm) for both the aquatic and the riparian area. This article presents methods for enhanced modeling and monitoring of instream meso-and microhabitats based on multitemporal data acquisition. This is demonstrated for a near natural reach of the Pielach River, with data acquired from April 2013 to October 2014, covering two flood events. In comparison with topographic laser scanning, ALB requires a number of specific processing steps. We present, firstly, a novel approach for modeling the water surface in the case of sparse water surface echoes and, secondly, a strategy for improved filtering and modeling of the Digital Terrain Model of the Watercourse (DTM-W). Based on the multitemporal DTM-W we discuss the massive changes of the fluvial topography exhibiting deposition/erosion of 10 3 m 3 caused by the 30-years flood event in May 2014.Furthermore, for the first time, such a high-resolution data source is used for monitoring of hydro-morphological units (mesohabitat scale) including the consequences for the target fish species nase (Chondrostoma nasus, microhabitat scale). The flood events caused a spatial Remote Sens. 2015, 7 6161 displacement of the hydro-morphological units but did not effect their overall frequency distribution, which is considered an important habitat feature as it documents resilience against disturbances.

show abstract

Sediment budget for salmonid spawning habitat rehabilitation in a regulated river

Cited by 74 publications

References 59 publications

Accounting for uncertainty in DEMs from repeat topographic surveys: improved sediment budgets

Accounting for uncertainty in DEMs from repeat topographic surveys: improved sediment budgets

Valley-scale morphology drives differences in fluvial sediment budgets and incision rates during contrasting flow regimes

Topo-Bathymetric LiDAR for Monitoring River Morphodynamics and Instream Habitats—A Case Study at the Pielach River

Contact Info

Product

Resources

About