Download Quantitative Modeling of Earth Surface Processes by Jon D. Pelletier PDF

By Jon D. Pelletier

This textbook describes probably the most powerful and simple quantitative options for modeling Earth floor approaches. via emphasizing a middle set of equations and answer ideas, the e-book provides cutting-edge versions presently hired in Earth floor strategy study, in addition to a suite of straightforward yet useful learn instruments. special case reports show software of the the way to a large choice of strategies together with hillslope, fluvial, aeolian, glacial, tectonic, and climatic platforms. routines on the finish of every bankruptcy commence with basic calculations after which development to extra subtle difficulties that require machine programming. the entire important machine codes can be found on-line at Assuming a few wisdom of calculus and uncomplicated programming event, this quantitative textbook is designed for complicated geomorphology classes and as a reference ebook for pro researchers in Earth and planetary technological know-how trying to find a quantitative method of Earth floor approaches.

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A main valley takes place much faster than erosion of a side tributary, leaving the side tributary ‘‘hung’’ above the floor of the main valley. Hanging valleys are, therefore, a consequence of the more spatially discontinuous nature of glacial erosion compared with fluvial erosion. It should be noted, however, that U-shaped valleys and hanging valleys are not unique to glacial systems. , 2006). As such, fluvial systems in tectonically very active areas or in areas with strong structural control can also form hanging valleys.

Bioturbation is another important hillslope process that can often be approximated as diffusive, particularly for gravelly hillslopes of arid environments where processes such as slope wash are relatively ineffective due to the coarse texture of the slope material. Slope wash, rilling, and mass movements are examples of hillslope processes that are not diffusive. Slope wash is not diffusive because the shear stress exerted by overland flow increases with distance from the divide as flow accumulates along the slope.

When along-strike relief falls below a threshold value, an eolian transportational surface develops. When the along-strike relief rises above the threshold value, sand is trapped locally in low spots and a continuous surface of transportation is prevented from developing. Along-strike relief promotes the storage of windblown sand in two ways. First, topographic obstacles create aerodynamic recirculation zones on their lee sides. These recirculation zones are characterized by very low bed shear stresses.

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