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 5 of 5 for “"Barchan dunes"”.
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The flow structure of interacting barchan dunes
… fixed-bed to examine the effects of interacting barchan dunes on the flow structure. The barchan dune models were based upon an idealized contour map, the shape and dimensions of which were based upon previous empirical studies of dune morphology. The experimental setup comprised two, co-axially …
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The sedimentology and petrology of the new red sandstone of the Elgin Basin, North East Scotland
… deposits which graded laterally into seif dunes to the north. Deposition during the Triassic is dominated by aeolian barchan dunes although minor point bar, playa and floodplain deposits were' present. A caliche, horizon terminates deposition during the late Triassic. The sediments were …
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Geomorphic Consequences of Hydroelectricity and Transportation Development near Celilo Falls, Lower Mid-Columbia River, Washington
… 1900 large pointbars were sediment sources for barchan dunes, lee dunes, linear dunes, and sandsheets. Airphoto increment analysis indicates from 1930 to 1956, an overall increase in total eolian landform area occurred and reversed after the construction of The Dalles Dam in 1957. The dam …
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Three-dimensional eolian bounding surface architecture of the Entrada sandstone, Utah: expanding our understanding of reservoir heterogeneity in wet eolian systems
… supply increase. The erg was likely composed of barchan dunes, barchanoid ridges, larger sinuous transverse draas, and superimposed smaller bedforms. The sinuous transverse draas were ~11.3 m tall and had a wavelength of ~169 m, according to trigonometric calculations. Fluctuations in eustatic …
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Avalanching on dunes and its effects: Size statistics, stratification, & seismic surveys
… true in the case of grain flows on sand dunes, in which the sedimentary stratification with which geologists are concerned arises from the granular processes investigated by physicists and engineers, and the water permeation that interests hydrologists and soil scientists determines the …