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Title: Mapping longitudinal stream connectivity in the North St. Vrain Creek watershed of Colorado

Journal Article · · Geomorphology

We use reach-scale stream gradient as an indicator of longitudinal connectivity for water, sediment, and organic matter in a mountainous watershed in Colorado. Stream reaches with the highest gradient tend to have narrow valley bottoms with limited storage space and attenuation of downstream fluxes, whereas stream reaches with progressively lower gradients have progressively more storage and greater attenuation. We compared the distribution of stream gradient to stream-reach connectivity rankings that incorporated multiple potential control variables, including lithology, upland vegetation, hydroclimatology, road crossings, and flow diversions. We then assessed connectivity rankings using different weighting schemes against stream gradient and against field-based understanding of relative connectivity within the watershed. Here, we conclude that stream gradient, which is simple to map using publicly available data and digital elevation models, is the most robust indicator of relative longitudinal connectivity within the river network.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
Universities/Institutions; USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1414148
Report Number(s):
LA-UR-17-22329; TRN: US1800671
Journal Information:
Geomorphology, Vol. 277, Issue C; ISSN 0169-555X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 31 works
Citation information provided by
Web of Science

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Cited By (9)

An attempt to measure longitudinal connectivity based on the community structure of phytoplankton journal May 2019
Afroalpine Wetlands of the Bale Mountains, Ethiopia: Distribution, Dynamics, and Conceptual Flow Model journal February 2019
Connectivity as an emergent property of geomorphic systems: Geomorphic connectivity journal July 2018
Shifting stream planform state decreases stream productivity yet increases riparian animal production journal March 2018
The fate of sediment, wood, and organic carbon eroded during an extreme flood, Colorado Front Range, USA journal March 2017
Connectivity in rivers journal June 2017
Barrier-based Longitudinal Connectivity Index for Managing Urban Rivers journal November 2018
Elevational differences in hydrogeomorphic disturbance regime influence sediment residence times within mountain river corridors journal May 2019
The persistence of beaver-induced geomorphic heterogeneity and organic carbon stock in river corridors: Beaver-induced heterogeneity journal September 2018

Figures / Tables (9)


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