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Showing 1 to 20 of 138 for “"Erosion rates"”.
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Sediment Dynamics in a Dryland River: Grain-Size Variations, Erosion Rates, Sediment Mixing and Dam Effects
… analysis, a tool for determining catchment-wide erosion rates and addressing associated geomorphic questions, has seen few applications to large dryland rivers and dammed rivers. Here, three questions are addressed concerning dam effects on sediment supply and grain size: (1) What is the …
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Sediment Dynamics in a Dryland River: Grain-Size Variations, Erosion Rates, Sediment Mixing and Dam Effects
… analysis, a tool for determining catchment-wide erosion rates and addressing associated geomorphic questions, has seen few applications to large dryland rivers and dammed rivers. Here, three questions are addressed concerning dam effects on sediment supply and grain size: (1) What is the …
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Beryllium-10 derived erosion rates from the Hangay Mountains, Mongolia: landscape evolution in a periglacially-dominated continental interior
… been used as a way to determine basin-average erosion rates around the world. These erosion rates are useful to geomorphologists investigating landscape evolution. The Hangay Mountains in Mongolia are a prime location to use beryllium-10 because of the granitic rocks that provide the quartz …
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The role of precipitation on Bedrock Channel Incision in Kauai, HI
Erosion of bedrock channels is frequently modeled with the stream power law, which relates erosion rates to drainage area, slope, and an erosional efficiency coefficient k. The value of k, however, varies with many physical factors and most of these relationships are not well quantified. This study …
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Investigating rates and mechanisms of lateral erosion in a small bedrock river using erosion pins, structure-from-motion photogrammetry, and optically stimulated luminescence dating: Konza Prairie, northeast Kansas
… the fluvial processes driving lateral bedrock erosion and the timescales over which it occurs remain poorly understood. In order to advance our understanding of how bedrock rivers erode laterally over time, I investigated past and present erosion rates at Kings Creek, an incised stream in …
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Post Harvest Evaluation of Best Management Practices for the Prevention of Soil Erosion in Virginia
Poor harvesting practices can accelerate soil erosion and decrease water quality and site productivity. Forestry Best Management Practices (BMPs) were developed to protect water quality, primarily by minimizing erosion during and after timber harvests. Although properly employed BMPs mitigate …
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Evaluation of Coupled Erosional Processes and Landscape Evolution in the Teton Range, Wyoming
… climate or elevation regime. The focus of erosion by glacial, fluvial, or mass wasting processes is highly sensitive to small changes in boundary conditions, therefore spatial and temporal variability can be high when observed over short time scales. This work evaluated methods for …
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Hillslope erosion and weathering rates in Earth's most rapidly uplifting mountains
Knowledge of hillslope erosion rates and processes is necessary for understanding landscape response to tectonic and climatic forcing and for determining the degree to which mountains regulate biogeochemical cycles and global climate. Landslide erosion and soil production are the principle …
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Evaluating Streambank Retreat Prediction Using the BANCS Model in the Valley and Ridge Physiographic Province
… value in credits received per dollar spent. Bank erosion is most commonly credited through the Bank Assessment for Non-point source Consequences of Sediment (BANCS) framework, an empirically-derived model that predicts bankfull bank erosion rates using Bank Erodibility Hazard Index (BEHI), an …
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The slurry erosive-corrosive wear of a selection of aliminium alloys, particulate reinforced aluminium metal matrix composites and a selection of steels
… concepts relating to the synergistic effects of erosion and corrosion. In general both the heat-treatable and non heat-treatable aluminium alloys exhibit lower slurry erosion rates with increasing hardness and work to fracture values. The slurry erosion rates of the aluminium matrix alloys …
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Effects of Black-tailed Prairie Dogs (Cynomys Iudovicianus) on Soil Erosion
<p>The rates of natural erosion are poorly understood, especially with respect to influences by fauna. Soil traps were implemented in a prairie dog town 14 miles NW of Killdeer, ND to measure and compare erosion rates within the prairie dog town to those of a control site comprised of natural …
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A Comparison of Natural, Living, and Hardened Shorelines Ability to Prevent Coastal Erosion and Maintain a Healthy Ecosystem
… for when the natural marsh suffers excess erosion rates. Living shorelines are a suite of shoreline conservation and restoration techniques that usually involve some sort of hardened structure that dampens wave energy so that the native vegetation behind it can take root and stabilize the …
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THE PACE AND TIMING OF CHANGING LANDSCAPES AS VIEWED THROUGH COSMOGENIC RADIONUCLIDES: SYNTHETIC AND REAL EXAMPLES FROM THE CENTRAL ANDES AND AMAZONIA
… the average rate of surface lowering (i.e. the erosion rate) of the integrated catchment area upstream of that point, allowed many researchers to explore the linkages between climate, tectonics, and surface processes in evolving landscapes. In contrast to dozens of studies investigating the …
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Scales of Bank Roughness and Their Relationship to Bank Erosion Processes
Stream bank erosion rates and the stabilization of channel width are poorly understood processes. There have been two distinct approaches to the study and prediction of bank erosion rates in natural streams. In order to predict bank shear stresses, scientists either define a reach as being …
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Effect of water temperature on cohesive soil erosion
… />effect of water temperature on cohesive soil erosion should be explored. The objectives of this study are to: determine the effect of water temperature on the erosion rates of clay; determine how erosion rates vary with clay mineralogy; and, explore the relationship between zeta potential and …
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Do Roots Bind Soil? Comparing the Physical and Biological Role of Plant Roots in Streambank Fluvial Erosion
… effects of roots on streambank fluvial erosion. A series of laboratory-scale erosion tests were conducted using a mini jet erosion testing device and a recirculating flume channel to address this goal. Several soil and vegetation factors that influence fluvial entrainment, like …
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Determining timescales of natural carbonation of peridotite in the Samail Ophiolite, Sultanate of Oman
… of the Samail Ophiolite, Sultanate of Oman. Rates of ongoing, low-temperature CO2 uptake were estimated through 14C and 230Th dating of carbonate alteration products. Approximately 1-3 x 106 kg CO2/yr is sequestered in Ca-rich surface travertines and approximately 107 kg CO2/yr is sequestered …
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Determining timescales of natural carbonation of peridotite in the Samail Ophiolite, Sultanate of Oman
… of the Samail Ophiolite, Sultanate of Oman. Rates of ongoing, low-temperature CO₂ uptake were estimated through ¹⁴C and ²³⁰Th dating of carbonate alteration products. Approximately 1-3 x 10⁶ kg CO₂/yr is sequestered in Ca-rich surface travertines and approximately 10⁷ kg CO₂/yr is sequestered …
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