Ecoregions and stream morphology in eastern Oklahoma

Splinter, Dale K.; Dauwalter, Daniel C.; Marston, Richard A.; Fisher, William L.

doi:10.1016/j.geomorph.2010.06.004

Cited by 23 publications

(7 citation statements)

References 70 publications

(89 reference statements)

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“…These variables were not correlated with segDist (Table 2) and therefore grain size patterns were discontinuous with respect to position in the network. The strong contribution of the physiographic factors to our grain size predictions is also in agreement with recent work by Splinter et al (2010) who showed that the relationships between grain size and watershed area varied between ecoregions that were defined by physiographic factors. We showed that the modelled relationship between mean grain size and the predictors had a high level of generality.…”

Section: Discussionsupporting

confidence: 92%

Empirical modelling of large scale patterns in river bed surface grain size

Snelder

Lamouroux²,

Pella³

2011

Geomorphology

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Section: Discussionsupporting

confidence: 92%

Empirical modelling of large scale patterns in river bed surface grain size

Snelder

Lamouroux²,

Pella³

2011

Geomorphology

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“…Many authors have tried to reduce the variability of a population by regionalizing the available data according to a number of criteria to minimize the variability of influencing factors. Data have been stratified by ecoregions (Castro and Jackson, ; Faustini et al ., ; Splinter et al ., ), hydrologic regions (Mulvihill and Baldigo, ), water resources regions (Faustini et al ., ), and physiographic regions (Castro and Jackson, ; Johnson and Fecko, ). However, only Faustini et al .…”

Section: Discussionmentioning

confidence: 97%

Development and Evaluation of Bankfull Hydraulic Geometry Relationships for the Physiographic Regions of the United States

Bieger

Rathjens

Allen

et al. 2015

J American Water Resour Assoc

150

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Bankfull hydraulic geometry relationships are used to estimate channel dimensions for streamflow simulation models, which require channel geometry data as input parameters. Often, one nationwide curve is used across the entire United States (U.S.) (e.g., in Soil and Water Assessment Tool), even though studies have shown that the use of regional curves can improve the reliability of predictions considerably. In this study, regional regression equations predicting bankfull width, depth, and cross-sectional area as a function of drainage area are developed for the Physiographic Divisions and Provinces of the U.S. and compared to a nationwide equation. Results show that the regional curves at division level are more reliable than the nationwide curve. Reliability of the curves depends largely on the number of observations per region and how well the sample represents the population. Regional regression equations at province level yield even better results than the division-level models, but because of small sample sizes, the development of meaningful regression models is not possible in some provinces. Results also show that drainage area is a less reliable predictor of bankfull channel dimensions than bankfull discharge. It is likely that the regional curves can be improved using multiple regression models to incorporate additional explanatory variables.(KEY TERMS: streams; fluvial geomorphology; bankfull discharge; nationwide and regional regression equations; hydrologic modeling.)

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“…Many studies have documented the impact of urbanization on stream channel erosion and its relationship to watershed characteristics, such as percentage impervious cover (Hawley and Bledsoe, 2013;Taniguchi and Biggs, 2015) and geology, slope, and land cover (Booth et al, 2010;Splinter et al, 2010). Although watershed characteristics may predict channel enlargement in many cases, they may not be the only factors causing stream channel erosion.…”

Section: Introductionmentioning

confidence: 99%

Stream channel erosion in a rapidly urbanizing region of the US–Mexico border: documenting the importance of channel hardpoints with Structure‐from‐Motion photogrammetry

Taniguchi

Biggs

Langendoen

et al. 2018

Earth Surf Processes Landf

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Urbanization can lead to accelerated stream channel erosion, especially in areas experiencing rapid population growth, unregulated urban development on erodible soils, and variable enforcement of environmental regulations. A combination of field surveys and Structure-from-Motion (SfM) photogrammetry techniques was used to document spatial patterns in stream channel geometry in a rapidly urbanizing watershed, Los Laureles Canyon (LLCW), in Tijuana, Mexico. Ground-based SfM photogrammetry was used to map channel dimensions with 1 to 2 cm vertical mean error for four stream reaches (100-300 m long) that were highly variable and difficult to survey with a differential GPS. Regional channel geometry curves for LLCW had statistically larger slopes and intercepts compared with regional curves developed for comparable, undisturbed reference channels. Cross-sectional areas of channels downstream of hardpoints, such as concrete reaches or culverts, were up to 64 times greater than reference channels, with enlargement persisting, in some cases, up to 230 m downstream. Percentage impervious cover was not a good predictor of channel enlargement. Proximity to upstream hardpoint, and lack of riparian and bank vegetation paired with highly erodible bed and bank materials may account for the instability of the highly enlarged and unstable cross-sections. Channel erosion due to urbanization accounts for approximately 25-40% of the total sediment budget for the watershed, and channel erosion downstream of hardpoints accounts for one-third of all channel erosion. Channels downstream of hardpoints should be stabilized to prevent increased inputs of sediment to the Tijuana Estuary and local hazards near the structures, especially in areas with urban settlements near the stream channel.

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Ecoregions and stream morphology in eastern Oklahoma

Cited by 23 publications

References 70 publications

Empirical modelling of large scale patterns in river bed surface grain size

Empirical modelling of large scale patterns in river bed surface grain size

Development and Evaluation of Bankfull Hydraulic Geometry Relationships for the Physiographic Regions of the United States

Stream channel erosion in a rapidly urbanizing region of the US–Mexico border: documenting the importance of channel hardpoints with Structure‐from‐Motion photogrammetry

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