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Well this is one way of doing it, I'm sure there is a smarter raster way of processing it? Assuming your data is not the entire Amazon basin (!) turn your elevation into a point dataset, so each point has a unique ID and the elevation. In your image you depict your river network as a vector line, use that to select the points that are the points along ...


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This thread may help you. Which talks of using Euclidean distance and Con tool to select a particular cell based on a conditionality. Conditional reclassification of a raster you may try using Euclidean distance to select the neighbouring cell based on the condition of a boundary of river network and the elevation difference.


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One approach that our amazing intern recently used, which turned out really well for us: Fill the DEM Calculate flow direction on the filled raster Accumulate the flow of the flow direction output Do a Con operation to set all cells with an accumulated flow over some threshold (that is meaningful for your geographic area and for your cell size) to be 1 and ...


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I would suggest you take a look at Aquaveo's WMS. It is a GIS platform in which you can actually run most of HEC's applications. It is actually a swiss army knife for leveraging water resources issues. It seamlessly integrates CAD, GIS and raster data features with the intent to handle better and visualize multiple water resources scenarios. It handles ...


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I will assume you have your DEM, have been able to calculate the flow direction raster (the ArcGis help has a good explanation). You also need to have defined a raster of the drainage which has values of 0 for each cell along a drainage (height above drainage is 0 by definition) and has nulls for all other cells. You need to know which cell is downslope and ...



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