Geologic studies of the Platte River, south-central Nebraska and adjacent areas — Geologic maps, subsurface study, and geologic history

Condon, Steven M.

doi:10.3133/pp1706

Cited by 27 publications

(34 citation statements)

References 50 publications

(134 reference statements)

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“…McMillan et _ al., 2002;Heller et _ al., 2003;Condon, 2005;Wobus et _ al., 2010). These deposits are inset by younger fluvial deposits, of the Broadwater Formation, which provide a record of fluctuations in climate and palaeo-hydrology in and around the Mid-Pliocene climatic optimum (Duller et al, 2012).…”

Section: The Platte River Catchmentmentioning

confidence: 99%

Relation between alternations of uplift and subsidence revealed by Late Cenozoic fluvial sequences and physical properties of the continental crust

Westaway

Bridgland

2014

Boreas

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Section: The Platte River Catchmentmentioning

confidence: 99%

Relation between alternations of uplift and subsidence revealed by Late Cenozoic fluvial sequences and physical properties of the continental crust

Westaway

Bridgland

2014

Boreas

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“…Loess is defined as eolian deposits of primarily silt-sized particles (Pye, 1995) that can be as thick as 325 ft (Condon, 2006;Johnson and Brennan, 1960;Richmond and others, 1994).…”

Section: Thousands Of Acres Yearmentioning

confidence: 99%

Groundwater-flow model of the northern High Plains aquifer in Colorado, Kansas, Nebraska, South Dakota, and Wyoming

Peterson¹,

Flynn²,

Traylor³

2016

Scientific Investigations Report

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“…Figure 1 shows a section of the central Platte between the cities of Overton, NE and Chapman, NE. In this area the Platte River has a complex braided channel system with variable widths (see inset in Figure 2), the main thread varies from 50-100 m during low flows but expands to around 1 km during high flows, while small channels can be as narrow as 10 m. The longitudinal slope of the river is ∼140 cm/km and bed material consists of gravels mixed with silts and sands (Condon, 2005). The Central Platte is an internationally significant habitat for migratory birds, including three species listed as endangered or threatened, and represents a critical stopover point on the North American Flyway (Kinzel et al, 2006).…”

Section: Site Description and Available Datamentioning

confidence: 99%

Metric-Resolution 2D River Modeling at the Macroscale: Computational Methods and Applications in a Braided River

2015

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Metric resolution digital terrain models (DTMs) of rivers now make it possible for multi-dimensional fluid mechanics models to be applied to characterize flow at fine scales that are relevant to studies of river hydraulic geometry (HG) and ecological habitat, or microscales. These developments are important for managing rivers because of the potential to better understand system dynamics, anthropogenic impacts, and the consequences of proposed interventions. However, the data volumes and computational demands of microscale river modeling have largely constrained applications to small multiples of the channel width, or the mesoscale. This report presents computational methods to extend a microscale river model beyond the mesoscale to the macroscale, defined as large multiples of the channel width. A method of automated unstructured grid generation is presented that automatically clusters fine resolution cells in areas of curvature (e.g., channel banks), and places relatively coarse cells in areas lacking topographic variability. This overcomes the need to manually generate breaklines to constrain the grid, which is painstaking at the mesoscale and virtually impossible at the macroscale. The method is applied to a braided river (BR) and shown to yield an efficient fine resolution model. The sensitivity of model output to grid design and resistance parameters is also examined based on analysis of hydrology, HG, and river hydraulic habitats and the findings reiterate the importance of model calibration and validation.

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Geologic studies of the Platte River, south-central Nebraska and adjacent areas — Geologic maps, subsurface study, and geologic history

Abstract: Plates 1. Geologic map and topographic profile of the Elm Creek West 7.5 minute quadrangle 2. Geologic map and topographic profile of the Newark 7.5 minute quadrangle IV

Cited by 27 publications

References 50 publications

Relation between alternations of uplift and subsidence revealed by Late Cenozoic fluvial sequences and physical properties of the continental crust

Relation between alternations of uplift and subsidence revealed by Late Cenozoic fluvial sequences and physical properties of the continental crust

Groundwater-flow model of the northern High Plains aquifer in Colorado, Kansas, Nebraska, South Dakota, and Wyoming

Metric-Resolution 2D River Modeling at the Macroscale: Computational Methods and Applications in a Braided River

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