Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"aggrading"”.
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The effects of accelerated soil acidification on aggrading temperate deciduous forests: The Fernow Experimental Forest Long Term Soil Productivity (LTSP) Study at 13 years
… and S additions, soil and foliar chemistry in an aggrading temperate deciduous forest show signs of soil acidification and calcium (Ca) and magnesium (Mg) depletion -- suggesting that the ability of these regenerating forests to store C may diminish if acidification were to continue. Additionally, …
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Initial deposition in the Sevier foreland basin of southern Nevada: Conglomerates of the Cretaceous Willow Tank Formation, Clark County, Nevada
… sandstone lithofacies represent deposition by aggrading and migrating longitudinal bars, dunes, ripples and horizontal plane beds in a braided stream system. Comparison of the vertical and lateral distribution of these lithofacies suggests that the sediments were part of a large proximal …
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Vegetative Potential to Reduce Total Dissolved Solid Nutrient Ions Generated from Reclaimed Mine Lands in Central Appalachia
… ion fluxes. These findings indicate that aggrading forests may reduce TDS nutrient ion loading, through solute retention mechanisms driven by organic matter inputs and plant uptake.
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Holocene Periods of Aggradation and Incision, Hanson Creek, Washington
… <em>in situ</em> charcoal. The results reveal an aggrading fluvial system that entrained and transported silt to cobble sized sediment from a minimum age of 7680-7580 BP prior to the historic arroyo incision event, which most likely occurred between AD 1878 and AD 1954. The cause of the incision …
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Characterising alluvial architecture using physical models, subsurface data and field analogues
… A depositional model is proposed representing an aggrading alluvial plain traversed by a series of 100 to 1100 m wide channel-belts with palaeochannel depths of between 1.5 and 3.5 m, and supplied with a fine grain size distribution (D50 = 0.08 mm). A seasonal climatic regime probably promoted …
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Channel Migration and Bank Erosion of the Clark Fork River at Grant-Kohrs Ranch N.H.S., Western Montana
… area and elevation to determine if the bed is aggrading or degrading. Slope and thalweg measurements, along with a Wolman pebble count were conducted along each segment. An Incipient Motion Method was used to determine at which discharge motion would begin. From the record of flow, and cross …
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Channel Migration and Bank Erosion of the Clark Fork River at Grant-Kohrs Ranch N.H.S., Western Montana
… area and elevation to determine if the bed is aggrading or degrading. Slope and thalweg measurements, along with a Wolman pebble count were conducted along each segment. An Incipient Motion Method was used to determine at which discharge motion would begin. From the record of flow, and cross …
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Geoarchaeology of the Orontes River Floodplain Surrounding Tell Qarqur, Syria
… a complex relationship between humans and an aggrading floodplain environment.</p>
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Petrology and geochemistry of the Killdeer carbonates
… water followed by rapid lithification and aggrading recrystallization.</p> <p>The dolomite contains more abundant allochems, tends to have a rhombic granular texture, occurs in thinner units with coarse nodular surfaces, and is located higher stratigraphically. This rock type is often …
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Effects of Land-Use History on Soil Macro- and Trace Elements in the Southern Piedmont of North America
… resupplies kept pace with accumulations by the aggrading forest. 3) Oxalate-extractable Fe increased substantially during forest growth, by about 10-fold more than accumulations in tree biomass. This study indicated that forest Fe cycling is qualitatively different from that of other macro- and …
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Origin and stratigraphy of Holocene sediments, Souris and Des Lacs glacial-lake spillways, north-central North Dakota
… Lake Souris. After the flood subsided, an aggrading, meandering Souris River occupied the valley. Initially, the sides of both the Souris and Des Lacs Valleys were steep, and slumping occurred. Numerous intermittent streams entered the valleys from the sides and deposited coarse material …
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Stratigraphy of the upper part of the Fort Union Group in southwestern McLean County, North Dakota
… Butte Formation were probably deposited on an aggrading delta or a coastal plain as channel, levee, crevasse-splay, flood basin, and swamp deposits.</p>
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Thirty-year Changes in Mineral Soil C in a Cumberland Plateau Forest as Influenced by Inorganic-N, Soil Texture, and Topography
Increases in atmospheric C have resulted in concerns about global warming and interest in finding means to sequester atmospheric C through land management strategies. The purpose of this study was to (i) compare changes in mineral soil C after a 30-year interval and (ii) examine the role of …
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Environmental and developmental regulation of carbon cycling in a warm-temperate forest
… in the soil, the longest lived pool of C in aggrading forests. The lack of C buildup in soils makes long-term mitigation of anthropogenic CO2 emissions through sequestration by temperate forest ecosystems less likely, although C storage in biomass contributes to a decadal-scale C sink. In an …
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Modeling the interactions of forest cutting and climate change on the hydrology, biomass and biogeochemistry of a northeastern forest
… mature forest (pre-cut) conditions than for an aggrading forest (post-cut conditions). </p> <p>Simulations of the interactions between forest harvest practices and future climate change for W5 demonstrated the greater sensitivity of forest ecosystem nutrient pools to logging strategies under …
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Characterisation and evolution of periglacial landscapes in Northern Siberia during the Late Quaternary : remote sensing and GIS studies
… which have developed in environments with aggrading permafrost, are considered a net sink for carbon, as organic matter is stored in peat or is syn-sedimentary frozen with permafrost aggradation. Contrary, the Holocene thermokarst development resulted in permafrost degradation and thus the …