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44 lines
2.2 KiB
HTML
44 lines
2.2 KiB
HTML
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<html>
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<head><link rel="stylesheet" type="text/css" href="help.css"/></head>
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<body>
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<h1 class='module'>Slope Area Combination</h1>
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<div class='author'>(c) 2010 by David G. Tarboton</div>
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<div class='description'>Creates a grid of slope-area values = <tt>(S<sup>m</sup>)
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(A<sup>n</sup>)</tt> based on slope and specific catchment area grid inputs,
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and parameters <tt>m</tt> and <tt>n</tt>. This tool is intended for use
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as part of the slope-area stream raster delineation method.</div>
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<h2>Parameters</h2>
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<dl class='parameters'>
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<dt>Number of Processes <div class='type'>Integer</div></dt>
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<dd>The number of stripes that the domain will be divided into and the
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number of MPI parallel processes that will be spawned to evaluate each
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of the stripes.</dd>
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<dt>Slope Grid <div class='type'>Raster Grid</div></dt>
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<dd>This input is a grid of slope values. This grid can be obtained
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from the "D-Infinity Flow Directions" tool.</dd>
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<dt>Area Grid <div class='type'>Raster Grid</div></dt>
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<dd>A grid giving the specific catchment area for each cell taken as
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its own contribution (grid cell length or summation of weights) plus
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the proportional contribution from upslope neighbors that drain in to
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it. This grid is typically obtained from the "D-Infinity Contributing
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Area" tool.</dd>
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<dt>Slope Exponent <div class='type'>Double</div></dt>
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<dd>The slope exponent (<tt>m</tt>) parameter which will be used in
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the formula: <tt>(S<sup>m</sup>)(A<sup>n</sup>)</tt>, that is used
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to create the slope-area grid. Default value <strong>2</strong>.</dd>
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<dt>Area Exponent <div class='type'>Double</div></dt>
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<dd>The area exponent (<tt>n</tt>) parameter which will be used in
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the formula: <tt>(S<sup>m</sup>)(A<sup>n</sup>)</tt>, that is used to
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create the slope-area grid. Default is <strong>1</strong>.</dd>
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</dl>
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<h2>Outputs</h2>
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<dl class='parameters'>
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<dt>Slope Area Grid <div class='type'>Raster Grid</div></dt>
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<dd>A grid of slope-area values = <tt>(S<sup>m</sup>)(A<sup>n</sup>)</tt>
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calculated from the slope grid, specific catchment area grid, <tt>m</tt>
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slope exponent parameter, and <tt>n</tt> area exponent parameter.</dd>
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</dl>
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</body></html>
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