Download or read book Preliminary Assessment of Channel Stability and Bed material Transport in the Rogue River Basin Southwestern Oregon written by U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-03-30 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes a preliminary assessment of bed material transport, vertical and lateral channel changes, and existing datasets for the Rogue River basin which encompasses 13, 390 square kilometers along the south wester Oregon coast.
Download or read book Preliminary Assessment of Channel Stability and Bed material Transport in the Coquille River Basin Southwestern Oregon written by U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-03-30 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes a preliminary study of bed-material transport, vertical and lateral channel changes, and existing datasets for the Coquille River basin, which encompasses 2,745 km2 (square kilometers) of the southwestern Oregon coast.
Download or read book Preliminary Assessment of Channel Stability and Bed material Transport in the Rogue River Basin Southwestern Oregon written by Krista L. Jones and published by . This book was released on 2012 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Assessment of Channel Stability and Bed material Transport in the Coquille River Basin Southwestern Oregon written by Krista L. Jones and published by . This book was released on 2012 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Assessment of Channel Stability and Bed material Transport Along Hunter Creek Southwestern Oregon written by U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-03-30 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes a reconnaissancelevel assessment of channel condition and bedmaterial transport relevant to the permitting of instream gravel extraction in Hunter Creek, a coastal stream draining to the Pacific Ocean south of Gold Beach, Oregon (fig. 1, next page). The assessment is based on a review of existing datasets (such as bridge-inspection surveys, watershed analyses, and gravel-extraction records), repeat delineation of bar and channel features from aerial photographs, and field observations and particle-size measurements made during July 2010. Findings from these multiple datasets and observations were used to (1) assess the vertical stability of the Hunter Creek channel and identify locations where the channel may be incising, aggrading, or stable and (2) identify key datasets and issues that are relevant to understanding channel condition, bed-material transport, and potential effects of instream gravel extraction on Hunter Creek.
Download or read book Preliminary Assessment of Channel Stability and Bed material Transport Along Hunter Creek Southwestern Oregon written by Krista L. Jones and published by . This book was released on 2011 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Assessment of Channel Stability and Bed Material Transport in the Tillamook Bay Tributaries and Nehalem River Basin Northwestern Oregon written by U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-03-30 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes a preliminary study of bed-material transport, vertical and lateral channel changes, and existing datasets for the Tillamook (drainage area 156 square kilometers [km2]), Trask (451 km2), Wilson (500 km2), Kilchis (169 km2), Miami (94 km2), and Nehalem (2,207 km2) Rivers along the northwestern Oregon coast.
Download or read book Preliminary Assessment of Channel Stability and Bed material Transport Along Hunter Creek Southwestern Oregon written by Krista L. Jones and published by . This book was released on 2011 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Assessment of Channel Stability and Bed material Transport in the Tillamook Bay Tributaries and Nehalem River Basin Northwestern Oregon written by Krista L. Jones and published by . This book was released on 2012 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Assessment of Vertical Stability and Gravel Transport Along the Umpqua River Southwestern Oregon written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stream Channel Stability written by Joe C. Willis and published by . This book was released on 1981 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a stable alluvial channel, no net erosion or deposition of sediment occurs on the average. The sediment supply rate from upstream is balanced by capacity of the flow to transport the bed material. Any successful channel design must maintain this equilibrium or establish it for channel reaches that are not stable. Design relationships between the bed material transport capacity and the hydraulic variables of flow are based primarily on data from relatively small test channels. Reliable data for equilibrium transport of bed material by flows over about twenty cfs are not adequate to insure that data from small flumes can be extrapolated to prototype designs. An investigation was conducted in the 250-ft long test channel at the USDA Sedimentation Laboratory to obtain additional data on equilibrium transport by flows up to 150 cfs. Data on the transport rates, flow friction factors, and statistical properties of the bed forms were obtained. The results are presented as basic variable correlations with the controlled variables of the experiments, depth and discharge, along with attempts to generalize the relationships by similitude principles. (Author).
Download or read book Channel Change and Bed Material Transport in the Lower Chetco River Oregon written by U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-03-30 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lower Chetco River is a wandering gravel-bed river flanked by abundant and large gravel bars formed of coarse bed-material sediment. The large gravel bars have been a source of commercial aggregate since the early twentieth century for which ongoing permitting and aquatic habitat concerns have motivated this assessment of historical channel change and sediment transport rates. Analysis of historical channel change and bed-material transport rates for the lower 18 kilometers show that the upper reaches of the study area are primarily transport zones, with bar positions fixed by valley geometry and active bars mainly providing transient storage of bed material. Downstream reaches, especially near the confluence of the North Fork Chetco River, have been zones of active sedimentation and channel migration.
Download or read book Channel Change and Bed material Transport in the Umpqua River Basin Oregon written by and published by . This book was released on 2011 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Umpqua River drains 12,103 square kilometers of western Oregon; with headwaters in the Cascade Range, the river flows through portions of the Klamath Mountains and Oregon Coast Range before entering the Pacific Ocean. Above the head of tide, the Umpqua River, along with its major tributaries, the North and South Umpqua Rivers, flows on a mixed bedrock and alluvium bed, alternating between bedrock rapids and intermittent, shallow gravel bars composed of gravel to cobble-sized clasts. These bars have been a source of commercial aggregate since the mid-twentieth century. Below the head of tide, the Umpqua River contains large bars composed of mud and sand. Motivated by ongoing permitting and aquatic habitat concerns related to in-stream gravel mining on the fluvial reaches, this study evaluated spatial and temporal trends in channel change and bed-material transport for 350 kilometers of river channel along the Umpqua, North Umpqua, and South Umpqua Rivers. The assessment produced (1) detailed mapping of the active channel, using aerial photographs and repeat surveys, and (2) a quantitative estimation of bed-material flux that drew upon detailed measurements of particle size and lithology, equations of transport capacity, and a sediment yield analysis. Bed-material transport capacity estimates at 45 sites throughout the South Umpqua and main stem Umpqua Rivers for the period 1951-2008 result in wide-ranging transport capacity estimates, reflecting the difficulty of applying equations of bed-material transport to a supply-limited river. Median transport capacity values calculated from surface-based equations of bedload transport for each of the study reaches provide indications of maximum possible transport rates and range from 8,000 to 27,000 metric tons per year (tons/yr) for the South Umpqua River and 20,000 to 82,000 metric tons/yr for the main stem Umpqua River upstream of the head of tide; the North Umpqua River probably contributes little bed material. A plausible range of average annual transport rates for the South and main stem Umpqua Rivers, based on bedload transport capacity estimates for bars with reasonable values for reference shear stress, is between 500 and 20,000 metric tons/yr. An empirical bed-material yield analysis predicts 20,000-50,000 metric tons/yr on the South Umpqua River and main stem Umpqua River through the Oregon Coast Range, decreasing to approximately 30,000 metric tons/yr at the head of tide. Surveys of individual mining sites in the South Umpqua River indicate minimum local bed-material flux rates that are typically less than 10,000 metric tons/yr but range up to 30,600 metric tons/yr in high-flow years. On the basis of all of these analyses, actual bedload flux in most years is probably less than 25,000 metric tons/yr in the South Umpqua and main stem Umpqua Rivers, with the North Umpqua River probably contributing negligible amounts. For comparison, the estimated annual volume of commercial gravel extraction from the South Umpqua River between 2001 and 2004 ranged from 610 to 36,570 metric tons, indicating that historical in-stream gravel extraction may have been a substantial fraction of the overall bedload flux.
Download or read book Talent Division of the Rogue River Basin Rexlamation Project Oregon written by United States. Congress. Senate. Committee on Interior and Insular Affairs and published by . This book was released on 1954 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Channel Change and Bed material Transport in the Lower Chetco River Oregon written by and published by . This book was released on 2012 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lower Chetco River is a wandering gravel-bed river flanked by abundant and large gravel bars formed of coarse bed-material sediment. Since the early twentieth century, the large gravel bars have been a source of commercial aggregate for which ongoing permitting and aquatic habitat concerns have motivated this assessment of historical channel change and sediment transport rates. Analysis of historical channel change and bed-material transport rates for the lower 18 kilometers shows that the upper reaches of the study area are primarily transport zones, with bar positions fixed by valley geometry and active bars mainly providing transient storage of bed material. Downstream reaches, especially near the confluence of the North Fork Chetco River, are zones of active sedimentation and channel migration. Multiple analyses, supported by direct measurements of bedload during winter 2008-09, indicate that since 1970 the mean annual flux of bed material into the study reach has been about 40,000-100,000 cubic meters per year. Downstream tributary input of bed-material sediment, probably averaging 5-30 percent of the influx coming into the study reach from upstream, is approximately balanced by bed-material attrition by abrasion. Probably little bed material leaves the lower river under natural conditions, with most net influx historically accumulating in wider and more dynamic reaches, especially near the North Fork Chetco River confluence, 8 kilometers upstream from the Pacific Ocean. The year-to-year flux, however, varies tremendously. Some years may have less than 3,000 cubic meters of bed material entering the study area; by contrast, some high-flow years, such as 1982 and 1997, likely have more than 150,000 cubic meters entering the reach. For comparison, the estimated annual volume of gravel extracted from the lower Chetco River for commercial aggregate during 2000-2008 has ranged from 32,000 to 90,000 cubic meters and averaged about 59,000 cubic meters per year. Mined volumes probably exceeded 140,000 cubic meters per year for several years in the late 1970s. Repeat surveys and map analyses indicate a reduction in bar area and sinuosity between 1939 and 2008, chiefly in the period 1965-95. Repeat topographic and bathymetric surveys show channel incision for substantial portions of the study reach, with local areas of bed lowering by as much as 2 meters. A specific gage analysis at the upstream end of the study reach indicates that incision and narrowing followed aggradation culminating in the late 1970s. These observations are all consistent with a reduction of sediment supply relative to transport capacity since channel surveys in the late 1970s, probably owing to a combination of (1) bed sediment removal and (2) transient river adjustments to large sediment volumes brought by floods such as those in 1964 and, to a lesser extent, 1996.
Download or read book Evaluation of Streamflow Records in Rogue River Basin Oregon written by Donald Richardson and published by . This book was released on 1952 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rogue River Oregon written by United States. Army. Corps of Engineers. Committee on Tidal Hydraulics and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
