Results 231 to 240 of about 897,335 (279)

Knowledge: A Mountain or a Stream?

Science, 1997
The author is university professor and senior vice president at the University of Virginia, Charlottesville, VA. E-mail: ded2x@virginia.edu . Theories about the nature of knowledge and methods of education have been debated since the days of ancient Greece.
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Iron Photoreduction and Oxidation in an Acidic Mountain Stream

Science, 1988
In a small mountain stream in Colorado that receives acidic mine drainage, photoreduction of ferric iron results in a well-defined increase in dissolved ferrous iron during the day. To quantify this process, an instream injection of a conservative tracer was used to measure discharge at the time that each sample was collected.
D M, McKnight, B A, Kimball, K E, Bencala   +2 more
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Dispersion in Mountainous Natural Stream

Journal of the Environmental Engineering Division, 1982
A chronological and critical review is made of existing methods for predicting coefficients and the area of the longitudinal turbulent dispersion, which were chosen by their importance and applicability to open natural streams. For natural mountain streams, a suitable method for calculating dispersion coefficient on the basis of flow parameters is ...
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Human impacts to mountain streams

Geomorphology, 2006
Mountain streams are here defined as channel networks within mountainous regions of the world. This definition encompasses tremendous diversity of physical and biological conditions, as well as history of land use. Human effects on mountain streams may result from activities undertaken within the stream channel that directly alter channel geometry, the
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Nitrogen transformations in a small mountain stream

Hydrobiologia, 1985
Ammonium, urea, and nitrate were added to Bear Brook, a second and third order stream in the Hubbard Brook Experimental Forest, New Hampshire. Removal of ammonium and urea during downstream transport coincided with the release of nitrate. Nitrate removal did not occur when it was added alone or with dissolved organic carbon.
Joanna S. Richey, William H. McDowell, Gene E. Likens   +2 more
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Channel geometry of mountain streams

2011
Channel networks in the glaciated mountain basins of Coastal and southern interior British Columbia (Ashnola River Basin) offer opportunities for morphometric studies relating the parameters of the flow area (A) - discharge (Q) relationship to readily available channel and basin parameters.
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Streams and Sources, Forests and Mountains

2016
The history of Ch’an/Zen and the Thai Forest Tradition is told from their respective genesis stories. The actions and attitudes of Bodhidharma and Mun and their immediate disciples are identified as revivalist rebels. In the case of the forest monks, their history as a general social movement is traced to the earliest days of the sangha in India and ...
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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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