Results 261 to 270 of about 710,344 (302)

Calculation of Bed Changes in Mountain Streams

Journal of Hydraulic Engineering, 1999
Simulation of flow and sediment transport in mountain streams is complicated by the presence of high gradients, abrupt changes in geometry, variations in regime of flow, and large roughness elements. Most of the numerical models to predict aggradation and degradation in alluvial channels have been developed for low-gradient rivers.
Jose L. Lopez, Marco A. Falcon
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Mountain stream, an overview

2015
An overview of phenomena occurring in case of flood in mountain streams.
Laigle, D., Naaim-Bouvet, F., Richard, Didier   +2 more
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Dispersion Model for Mountain Streams

Journal of Hydraulic Engineering, 1999
Major differences have often been observed between experimental measurements and solutions of the one-dimensional dispersion equation for the spreading of tracers in rivers. This paper compares calculated values of peak concentration decay rates, variances, and concentration distributions for three different one-dimensional models with experimental ...
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Niche Relationships of Mountain Stream Bryophytes

The Bryologist, 1985
Bryophyte community structure was studied in ten streams in the Adirondack Mountains of New York and adjacent areas over an elevation range of 625 m. Species composition, including frequency and cover and possible niche parameters including elevation, water temperature, pH, flow rate, incident light, substrate type and height above or depth below water
Nancy G. Slack, Janice M. Glime
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Transport of molybdenum in mountainous streams, Colorado

Geochimica et Cosmochimica Acta, 1976
Abstract Waters and sediments in some streams in Colorado contain elevated concentrations of Mo derived from mining areas upstream. In the streams studied, most of the Mo was transported in dissolved form. The suspended load carried a significant amount of Mo (up to 19%) only near the molybdenum mill at Climax.
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Trichoptera of Regulated Rocky Mountain Streams

1987
Regulation by impoundment markedly altered the trichopteran fauna of otherwise pristine Rocky Mountain streams. The number of taxa was typically reduced at regulated sampling stations below both surface-release and deep-release dams situated over a wide range of elevation. The relative contribution of caddis flies to total zoo benthos was diminished at
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Streams and Mountains without End.

The Far Eastern Quarterly, 1956
Alexander C. Soper, Sherman E. Lee, Wen Fong   +2 more
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Macroinvertebrate drift in a Rocky Mountain stream

Hydrobiologia, 1987
An extensive series of drift collections from a Rocky Mountain stream was used to investigate quantitative patterns in the taxonomic composition of drift throughout spring, summer and fall for 1975–1978. Drift was estimated by drift rate, the number of organisms drifting past a point per 24 h; and by drift density, the numbers of organisms collected ...
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Bubble size distributions in mountain streams

Mountain streams are hot spots for the exchange of gases such as oxygen or carbon dioxide with the atmosphere. Air-water gas exchange is accelerated by air bubbles entrained in turbulent flow and depends on bubble concentration and size. Yet, our understanding of gas exchange mechanisms and our ability to upscale gas fluxes is hampered by a severe lack
Marcus Klaus, Nicola Durighetto, Eliot Chatton, Paolo Peruzzo, Gianluca Botter   +4 more
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Peculiarities of hydraulics in mountain streams

1995
Mountain stream flows cannot be modelled with usual hydraulics tools. Indeed, because of the steep slope, there is intense solid transport which plays a major role on flow of both solid and liquid fractions. Additionally, because of large space and time variations in flow characteristics, the global phenomena are chaotic. Very specific scientific tools
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