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Showing 1 to 20 of 45 for “"River channels"”.
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Spatial distribution of global runoff and its storage in river channels
… surface runoff and its horizontal transfers in rivers. The dissertation presents an intensive analysis of the uncertainties in water balance calculations and the impact of uncertainties in the input data and the formulation of the water balance calculations on the runoff estimate. A simple …
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Remote sensing of submerged objects and geomorphology in continental shelf waters with acoustic waveguide scattering
… and used to image extensive networks of buried river channels and inclined sub-seafloor strata over tens of kilometers in nearreal time. Such a capability is of great advantage in geophysical applications. Since buried river channels are expected to be ubiquitous in continental shelf …
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Glacial geology and stratigraphy of southeastern Pierce and southwestern Benson counties, North Dakota
… ground moraine, proglacial plains, abandoned river channels, and sand dunes.</p> <p>In the laboratory, very coarse sand lithology percentages, till fabric, texture, and gross lithology were used to differentiate the drifts of the two lobes. The first two methods were the most useful.</p> …
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Evaluating sediment storage time for improved management of river basin pollution
… have detrimental effects on water quality and river ecology, with sediment deposition on, and subsequent infiltration into, streambed substrate impacting riverine habitats. Significant research has assessed the magnitude, controls, and impacts of fine sediment in river channels. Assessment of …
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The hydraulic and hydrological performance of large wood accumulation in a low-order forest stream
… important feature in the functioning of forested river channels and floodplains. Large wood has previously been removed from rivers in order to reduce flow resistance and increase channel conveyance. However, recently there has been an appreciation of the role of large wood accumulations in …
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Scales of Bank Roughness and Their Relationship to Bank Erosion Processes
… being meandering or straight, even though most river channels are neither meandering nor straight but a combination of the two. This thesis aims to determine if river segments can be divided into straight reaches and curved reaches with different bank erosion prediction approaches applied to …
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Dynamics of two South African floodplain forests
Riverine systems are an important component of landscape diversity because of the interaction of biodiversity patterns, disturbance regimes and environmental gradients therein. They stabilise migrating river channels and ameliorate hydrological extremes. Concern is growing over the degradation of …
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Taphonomy of Sediments: Bioturbation in the Triassic Moenkopi Formation in Southwestern Utah
… as having been deposited mostly in large ancient river channels, tidal flats, delta and shallow marine environments. Five stratigraphic sections measured in the Virgin Limestone Member provided the basis for this study. Detailed descriptions and quantification of bioturbation were recorded in each …
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Depositional environments and sandstone diagenesis in the Tyler Formation (Pennsylvanian), western North Dakota
… in northwestern North Dakota was deposited as a river channel system on a low-lying, prograding coastal plain. Depositional environments associated with the coastal plain include river channels, flood plains, lakes, estuaries, caliche paleosols, and backswamps. Throughout deposition of the Tyler …
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The marine geology of Mossel Bay, South Africa
… periods and include incised lowstand river channels and regressive aeolianites that extended at least 10 km inland from their associated palaeoshorelines. The MIS 5 deposits include transgressive beachrock, an extensive foreshore unit which prograded on the MIS 5e highstand, and …
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Assessment of Ground Water Exchange in Two Stream Channels and Associated Riparian Zones, Jocko Valley, Western Montana
… Assessment of Ground Exchange in Two Steam Channels and Associated Riparian Zones, Jocko Valley, Western Montana Chairperson: William W. Woessner Degraded riparian habitat is a concern throughout the United States. Repairing anthropogenic damage to river channels and wetlands is becoming …
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Assessment of Ground Water Exchange in Two Stream Channels and Associated Riparian Zones, Jocko Valley, Western Montana
… Assessment of Ground Exchange in Two Steam Channels and Associated Riparian Zones, Jocko Valley, Western Montana Chairperson: William W. Woessner Degraded riparian habitat is a concern throughout the United States. Repairing anthropogenic damage to river channels and wetlands is becoming …
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Caracterização geomorfológica e do meio físico da folha Itapororoca 1:25.000.
… anomalous drainage pattern, extremely straight channels, dendritic drainage basin and headwaters retreat, setting nuances typical of areas affected by transcurrent shear zones that are present on the substrate of Terreno Alto Pajeú (TAP), regional geologic unit where is situated the study area. …
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Developing a rapid method for assessing the physical stability of streams in Minnesota's Agassiz beach ridges
… beach ridges of glacial Lake Agassiz. Stream and river channels in this area host unusually diverse aquatic habitat and biodiversity, but incompatible land use along channels and in watersheds impair their quality and function. Previous rapid assessment protocols have been developed for stream …
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The development of a predictive procedure for localised three dimensional river flows
… flows typically found at localised areas of river systems. It is the intention that the model will be used to predict flow situations which are fully three dimensional. The model is, therefore, tested against a fully three dimensional test case of flow in a two-stage meandering channel. …
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Measuring channel mobility through the analysis of area-based change in analog experiments, with insights into alluvial environments
We quantify the mobility of alluvial river channels in order to better understand the relationship between channel mobility and fluvial environment. We analyze five analog experiments, performed between 2002 and 2007 at the Saint Anthony Falls Laboratory, for area-based change in river-channel plan …
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Monitoring and Managing River Corridors in the Midst of Growing Water Demand
Rivers and their surrounding riparian and subsurface ecosystems, known as river corridors, are important landscape features that provide a myriad of ecological and societal benefits. While the importance of riverine flooding has been widely acknowledged and extensively studied, very little research …
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Morphodynamics of large anabranching rivers : the case of the Madeira River, Brazil
Anabranching channels are the dominant channel pattern of large rivers worldwide. The top nine largest rivers of the world by water discharge, in particular, all develop anabranching channels. Given the limited understanding on large river morphodynamics and the mechanisms of formation and process …
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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
… 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 their size …
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Lateral Migration of the Red River, in the Vicinity of Grand Forks, North Dakota
<p>River channels are dynamic landforms that play an important role in understanding the alluvial changes occurring within this area. The evolution of the Red River of the North within the shallow alluvial valley was investigated within a 60 river mile area north and south of Grand Forks, North …
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