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| [[Image:River Reach Att.jpg|thumb|275 px|''River Reach Attributes'' dialog]]
| | #redirect [[SMS:1D Hyd Centerline Coverage]] |
| A centerline arc provides the backbone of the hydraulic model definition. It's direction should be from upstream to downstream as this is the way HEC-RAS commonly views the river. This automatically defines which is the left bank and which is the right bank (think of standing up river and looking downstream when determining left and right). A centerline has as attributes the river reach properties as defined in the ''River Reach Attributes'' dialog.
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| This dialog contains the following:
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| * Arc Type
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| * River Name
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| * Reach Id
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| * Reach Name
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| * Computational Length
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| ** Reset
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| * Feature Length
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| * Start Station
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| * End Station
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| ==Related Topics==
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| *[[SMS:1D Hyd Cross-Section Coverage|1D Hyd Cross-Section Coverage]]
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| *[[SMS:1D River Conceptual Model|1D River Conceptual Model]]
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| {{Navbox SMS}}
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| [[Category:SMS Dialogs]]
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| {{stub}}
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