Sediment transport data and related information for selected coarse-bed streams and rivers in Idaho

Abstract

You may order additional copies of this publication by sending your mailing information in label form through one of the following media. Please specify the publication title and series number. AbstractThis report and associated web site files provide sediment transport and related data for coarse-bed streams and rivers to potential users. Information on bedload and suspended sediment transport, streamflow, channel geometry, channel bed material, floodplain material, and large particle transport is provided for 33 study reaches in Idaho that represent a wide range of drainage areas, average annual streamflows, channel gradients, and substrate sizes. All the study reaches have a coarser layer of surface bed material overlaying finer subsurface material.Both bedload and suspended sediment transport increase with discharge and the relationship can be reasonably represented using a log-log model. At most sites, the suspended load makes up the majority of the total sediment load. The size of the largest bedload particle in transport and usually the median size of the bedload increase with discharge. However, the median size of the bedload is much smaller than the channel surface material and sand is the primary or a large component of the bedload material.A large proportion of the annual sediment production occurs at the higher streamflows during snowmelt. On average, discharges equal to or larger than bankfull occur 3.3 percent of the time and transport 61.5 percent of the annual bedload sediment. Discharges less than the average annual discharge, on average, occur 75.0 percent of the time and transport about 3.8 percent of the annual bedload sediment.

Impacts of wildfire on runoff and sediment loads at Little Granite Creek, western Wyoming

“…As a result, baseline values of suspended sediment concentrations (SSC) in the watershed are relatively high (between 100 and 1000 mg L − 1 ) during peak runoff. By comparison, SSC from streams in undisturbed forested areas draining granitic and/or metamorphic terrain under similar climatic and vegetative cover are typically no greater than about 100 mg L − 1 (Andrews, 1984;King et al, 2004;USFS unpublished data).…”

Geometry of meandering and braided gravel-bed threads from the Bayanbulak Grassland, Tianshan, P. R. China

“…Normalized histograms (probability density function) of water discharge, width and grain size. Blue: this study; gray: GBR (gravel bed river) data set (Church and Rood, 1983;Parker et al, 2007;King et al, 2004;Ashmore, 2013).…”

“…Three of them, the compendiums of Parker et al (2007), Church and Rood (1983) and King et al (2004) include measurements from single-thread rivers. The fourth one corresponds to measurements on individual threads of the braided Sunwapta River (Ashmore, 2013).…”

Climate change, forests, fire, water, and fish: Building resilient landscapes, streams, and managers

“…While the roaded watersheds produced more sediment, and one study of the first 4 years after construction 1950s-1980s, Kirchner and others 2001 and are subdivided by the presence or absence of roads in the basin. Short-term averages for larger basins are predicted from sediment rating curves and daily stream flows (1920( , Kirchner and others 2001, supplemented with data from King et al (2004) using the same methods and period of record as that of . Basin-average road-surface erosion is predicted from the GRAIP model (Black and others 2010), with values updated from Prasad (2007) based on measurements of road-surface erosion from the Middle Fork Payette watershed (Black, unpub.…”