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46 lines
3.0 KiB
HTML
46 lines
3.0 KiB
HTML
<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'>Catchment Area (Flow Tracing)</h1>
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<div class='author'>O.Conrad (c) 2001</div>
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<div class='description'>Flow tracing algorithms for calculations of flow accumulation and related parameters. These algorithms trace the flow of each cell in a DEM separately until it finally leaves the DEM or ends in a sink.<br/>
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<br/>
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References:<br/>
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<br/>
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Rho 8 (this implementation adopted the original algorithm only for the flow routing and will give quite different results):<br/>
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- Fairfield, J. / Leymarie, P. (1991):<br/>
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'Drainage networks from grid digital elevation models',<br/>
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Water Resources Research, 27:709-717<br/>
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<br/>
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Kinematic Routing Algorithm:<br/>
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- Lea, N.L. (1992):<br/>
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'An aspect driven kinematic routing algorithm',<br/>
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in: Parsons, A.J., Abrahams, A.D. (Eds.), 'Overland Flow: hydraulics and erosion mechanics', London, 147-175<br/>
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<br/>
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DEMON:<br/>
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- Costa-Cabral, M. / Burges, S.J. (1994):<br/>
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'Digital Elevation Model Networks (DEMON): a model of flow over hillslopes for computation of contributing and dispersal areas',<br/>
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Water Resources Research, 30:1681-1692<br/>
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<br/>
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</div>
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<h2>Parameters</h2>
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<dl class='parameters'>
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<dt>Grid system <div class='type'>Grid system</div></dt><dd>Grid system <div class='constraints'></div></dd>
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<dt>Elevation <div class='type'>Input Grid</div></dt><dd> <div class='constraints'></div></dd>
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<dt>Sink Routes <div class='type'>Input Grid</div></dt><dd> <div class='constraints'></div></dd>
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<dt>Weight <div class='type'>Input Grid</div></dt><dd> <div class='constraints'></div></dd>
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<dt>Material <div class='type'>Input Grid</div></dt><dd> <div class='constraints'></div></dd>
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<dt>Target <div class='type'>Input Grid</div></dt><dd> <div class='constraints'></div></dd>
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<dt>Catchment Area <div class='type'>Output Grid</div></dt><dd> <div class='constraints'></div></dd>
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<dt>Catchment Height <div class='type'>Output Grid</div></dt><dd> <div class='constraints'></div></dd>
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<dt>Catchment Slope <div class='type'>Output Grid</div></dt><dd> <div class='constraints'></div></dd>
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<dt>Total accumulated Material <div class='type'>Output Grid</div></dt><dd> <div class='constraints'></div></dd>
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<dt>Accumulated Material from _left_ side <div class='type'>Output Grid</div></dt><dd> <div class='constraints'></div></dd>
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<dt>Accumulated Material from _right_ side <div class='type'>Output Grid</div></dt><dd> <div class='constraints'></div></dd>
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<dt>Step <div class='type'>Integer</div></dt><dd> <div class='constraints'>Minimum: 1.0</div></dd>
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<dt>Method <div class='type'>Choice</div></dt><dd> <div class='constraints'>Available choices: Rho 8, Kinematic Routing Algorithm, DEMON</div></dd>
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<dt>DEMON - Min. DQV <div class='type'>Floating point</div></dt><dd>DEMON - Minium Drainage Quota Volume (DQV) for traced flow tubes <div class='constraints'>Maximum: 1.0</div></dd>
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<dt>Flow Correction <div class='type'>Boolean</div></dt><dd> <div class='constraints'></div></dd>
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</dl>
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</body></html>
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