Can springs cut canyons into rock?
نویسندگان
چکیده
منابع مشابه
Longitudinal profile of channels cut by springs
We propose a simple theory for the longitudinal profile of channels incised by groundwater flow. The aquifer surrounding the stream is represented in two dimensions through Darcy’s law and the Dupuit approximation. The model is based on the assumption that, everywhere in the stream, the shear stress exerted on the sediment by the flow is close to the minimal intensity required to displace a san...
متن کاملLongitudinal profile of channels cut by springs
We propose a simple theory for the longitudinal profile of channels incised by groundwater flow. The aquifer surrounding the stream is represented in two dimensions through Darcy’s law and the Dupuit approximation. The model is based on the assumption that, everywhere in the stream, the shear stress exerted on the sediment by the flow is close to the minimal intensity required to displace a san...
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The Geneva group had earlier found factors linking transcription activation to the nuclear pore. They now use a nuclease fused to a nuclear pore protein, which clips any DNA that comes to the nuclear pore for a visit. The regions preferentially cleaved by the nuclease were just upstream of 40% of genes on chromosome VI. Constitutively expressed genes use different promoter elements and may not ...
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When the conductors of an antenna have length greater than λ/4, where λ is the broadcast wavelength, the current distribution may have nodes where the current vanishes. If so, it would seem that the conductors could be cut at these nodes, creating small gaps, without any effect on the radiation of the antenna. The possibility of nodes in the current distribution of an antenna is suggested by th...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2006
ISSN: 0148-0227
DOI: 10.1029/2005je002663