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Showing 1 to 13 of 13 for “"Braided rivers"”.
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Morphodynamics and driftwood dispersal in braided rivers
… few studies focus on driftwood in large braided rivers and limited quantitative information is available on wood transport, deposition and remobilisation in these systems. The goals of the present work are: a) characterising the spatial organisation of wood deposits and identifying …
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Non-cohesive bank migration in meandering rivers and bank accretion in weakly braided rivers
… the dissertation is the migration of meandering rivers whose banks consist wholly, or partly, of non-cohesive bed-material-sized alluvial deposits; such banks are known as composite banks when the near-surface layers consist of fine-grained deposits. The relevant forces and environmental …
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Braided rivers: an exploratory study combining flume experiments and the analysis of remotely-sensed data
Braided rivers exhibit extremely complex and dynamic morphologies as their multiple channels are constantly re-worked. The research reported in this thesis explored a number of properties of braided river form and dynamics and some controlling factors through three individual but complementary …
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Numerical Modelling of Braiding Processes in Gravel-Bed Rivers
Gravel-bed braided rivers are distinctive natural environments that provid a wide range of key environmental, economic and recreational services. There is, however,a growing concern that over the twentieth century, an increasing number of braided rivers have metamorphosed into wandering or single …
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Distinguishing flood frequency and magnitude in the morphodynamics and sedimentology of rivers: insights from the South Saskatchewan River, Canada
… on the morphology and sedimentology of the sandy braided South Saskatchewan River, Canada was assessed. Comparison of 2004 - 2007 repeat GPR surveys and the production of DEMs of difference allowed quantification of the initial and long-term 2005 flood impact on reach morphology and sedimentology. …
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Hydrological factors influencing the ecology of riverbed breeding birds on the plains' reaches of Canterbury's braided rivers : a thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy in the University of Canterbury
The wide, unstable, braided riverbeds of the eastern South Island, New Zealand, have been inhabited by a diverse avifauna. Several species including the wrybill breed only on these rivers. Use is restricted mainly to the breeding season from September to December, so this was the critical study …
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Stratigraphy, Two-Dimensional Geometry and Internal Sedimentary Structure of Hyaloclastite Deposits in the Siða Formation, SE Iceland; Implications for Mechanisms of Emplacement
… at Location 2 resembles point bar formation in a braided river channel, while small-scale cross- and trough-cross bedding indicates the development braided river bars. The geometries of the lensoid hyaloclastite units are comparable to those of fluvial channels documented in the literature and …
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The geology of the Waterberg group in the southern Portion of the Waterberg basin
… interpreted as having been deposited by large braided rivers, forming an extensive braidplain which probably continued to the southwest, through Botswana into the northern Cape Province, where it may be represented by the Fuller Member
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Be/ing Grace/d. A phenomenological exploration of spiritual encounters with the more-than-human natural world in-crisis
… ‘He Awa Whiria’ (Macfarlane et al., 2024) a braided rivers approach and Existential Hermeneutic Phenomenology (EHP) methodology were applied to weave between diverse knowledge streams. Van Manen’s (2014) existentials and Gabriel Marcel’s (1948/1965b) philosophies of ‘being-for-another’ and …
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Sedimentology and Stratigraphy of Glacial Lake Souris, North Dakota: effects of a glacial-lake outburst
… for deposition of the outburst sediments: braided rivers, low-density turbidity currents (the dominant process), and high-density turbidity currents or modified grain flows. Most high-density flows resulted directly from the influx of the outburst or from continuous avalanching due to rapid …
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Facies patterns and controls on sedimentation in the Triassic Chinle formation of Northeast New Mexico
… Ancestral Rocky Mountain uplift and perennial braided-stream deposits on the plains to the east. The two fluvial systems were contemporaneous with the ephemeral rivers existing as transverse tributaries to a perennial trunk system flowing from north to south. Proximal ephemeral-stream deposits …
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Ephemeral river systems at the Skeleton Coast, NW-Namibia - Sedimentological and geomorphological studies on the braided river dominated Koigab Fan, the Cenozoic succession in the Uniabmond area and comparative studies on fluvio-aeolian interaction between ephemeral rivers and the Skeleton Coast Erg
… of NW Namibia comprising several ephemeral rivers, which flow west-southwest towards the Atlantic Ocean. The area is hyper-arid with less than 50 mm average annual rainfall and a rainfall variability of 72%. Therefore, the major catchment areas of the rivers are about 100-200 km further …