Name: WettedArea_2000cfs

Display Field: InPoly_FID

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Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The SRH2D hydrologic model software was used in conjunction with the 2022 topography model of the Trinity River between Lewiston Dam and the North Fork Trinity River to estimate flows and fish habitat at a variety of flow rates. The model operates within a two-dimensional mesh of variable cell sizes. Wetted area output directly from the model therefore follows model mesh cells, yielding a blocky configuration to the wetted area extent. For the data presented here, the water surface elevation estimates for mesh cells were used to develop a water surface (ArcGIS Terrain format), which was intersected with the 2022 topography model (also ArcGIS Terrain format) for a more accurate representation of the actual aerial extent. Preparation of mass point files for inclusion in terrains included removal of a few modeling artifact polygon centroids where major tributaries approach the river and at the tight river bend in Junction City. Post intersection processing included the removal of polygons covering less than 5 ft2, followed by smoothing of the angular results that come from Terrain intersection, as well as manual removal of additional model artifacts. See the associated document " Visual Explanation of Manual Wetted Area Polygon Edits.pdf" or the lineage section of these metadata for details.</SPAN></P></DIV></DIV></DIV>

Service Item Id: 2d2f23c89f124e40b1366bb619ff4896

Copyright Text: Processing to wetted area: Jeanne McSloy, Trinity River Restoration Program, U.S. Bureau of Reclamation. Underlying hydrologic modeling: Dr. Nathan Bradley, U.S. Bureau of Reclamation, Technical Services center.

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Spatial Reference: 102100  (3857)

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• Shape_Area ( type: esriFieldTypeDouble, alias: Shape_Area )

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