Latest Contributions by ChristineDartiguenave

You can use the geoprocessing Intersect tool to generate the intersection of the river lines and your vector line as points. Just select the 2 lines as input and specify "POINT" as output type.  The outputs will actually be multipoints but you can always dissolve them (Dissolve tool with the option Create Multi part features unchecked) to get back to points. Christine Dartiguenave Esri Water Resources Team ... View more

You can check the link below for more information: http://resources.arcgis.com/en/help/main/10.1/index.html#//003n00000008000000 Basically ArcGIS 10 can open and edit a 10.1 geodatabase BUT will not have access to 10.1 functionality and will not be able to edit data, such as network datasets or mosaic datasets that are using 10.1 functionality. Christine Dartiguenave Esri Water Resources Team ... View more

These are an artifacts of how the NED DEMs were created from the contour lines. You may see more or fewer of those depending on the process used. The dem and fdr are still good. On the other hand, you may want to use the more recent nhdplus dataset. Here is an article about the NED: http://www.asprs.org/a/publications/pers/99journal/march/1999_mar_289-296.pdf Christine Dartiguenave Esri Water Resources Team ... View more

In a versioned environment the UniqueID tables should not be versioned. They are used to provide unique IDs that all come from the same table independently of the version used for editing. When you are editing in a versioned environment the Add table contains all the attributes including the UniqueID field populated using the non versioned table. There will not be conflicts between versions. Since the UniqueID tables are not versioned they cannot be archived. You would have to copy the table if you want to keep a snapshot of that table at any given time. Christine Dartiguenave Esri Water Resources Team ... View more

There are a few ways to set the direction of the flows for a line: - using the digitized direction (i.e. lines are always digitized in the direction of the flow) - using an attribute indicating the direction relative to the digitized direction of the flow (with, against, indeterminate). - using a more complex scheme (related table, etc.) when the direction may change (e.g. tidal flows) If the flows are always going one way it is a good practice to have the digitized direction matching the flows. If you build a geometric network with the lines, you can set the flow direction in the line based on the digitized direction (with/against) or based on attribute in each line feature. Note that the flow direction is always uninitialized in a new geometric network (except the one we build in Arc Hydro) and needs to be set specifically to be able to perform upstream or downstream traces. If you edit the lines in the network, you will also have to reset their flow direction. Christine Dartiguenave Esri Water Resources Team ... View more

The objective of the model was to be used in environments when measures get updated frequently. This is why it relies on the Arc Hydro time series table. If your study uses specific values you can adjust and simplify the model to fit your needs and remove the Update TSValue on Points step in the model as long as you have the field TSVALUE in your input point feature class storing the values you want to use. Christine Dartiguenave Esri Water Resources Team ... View more

In Windows 7, right-click MyComputer (on your desktop or in windows explorer) and select Properties. Then select Advanced System Settings. Click the Advanced tab and click Environment Variables. Modify the path for the TEMP user variable. This setting is used by most Arc Hydro tools so you would get the errors in multiple places. Christine Dartiguenave Esri Water Resources Team ... View more

The big issue is to determine how to interpolate the flows. Is there any existing flows equations in your area you can apply? If not, your first step is to figure out the parameters that drive the flows (drainage area, meanelevation, etc.). Once you have equations, then you can use GIS to compute the required characteristics. Christine Dartiguenave Esri Water Resouces Team ... View more

Can you run the tool from the toolbox and check whether you are getting a more detailed error in the geoprocessing result window? Christine Dartiguenave Esri Water Resources Team ... View more

It looks like there is a space in the temp path where the function tries to write the temporary grid. Check  the value of the environment variable for %TEMP% and if there is a space in there or it is a very long path, you may want to reset it to a smaller path that does not contain spaces or weird characters (e.g. c:\temp). Christine Dartiguenave Esri Water Resources Team ... View more

You will have limited feeback with the tool from the menu. You will see more messages if you use the one from the toolbox. Create Drainage Line Structures and Adjust Flow Direction in Streams (modified) are fairly recent and you will find them in the newest versions (2.1 for ArcGIS 10/10.1 for ArcGIS 10.1) of Arc Hydro. Christine Dartiguenave Esri Water Resources Team ... View more

The WSEAlongStream was generated using the model Stream WSE From Point WSE Measurements, which creates this raster using the specified input streams and values measured at the points at a defined time (the idea was to be able to automate WSE and flood polygon generation based on real time data obtained every 15 mns). In your case you want to interpolate the observed gage values at the gage location along the "stream" lines that best represent your stream.  This stream can come from observations or be generated by Arc Hydro if you do not have any known river. The DEM will be used to identify the areas that are lower than the water surface elevations and are connected to the streams. You should use the raw DEM to keep the original elevations. Christine Dartiguenave Esri Water Resources Team ... View more

Yes it is possible. You can take a look at the model "Flood from Stream WSE" in the Arc Hydro toolbox under the H&H Modeling>Map to Map toolset to get an idea about how the process works. Basically you can create a water surface elevation stream grid based on your measurements and use a set of Spatial Analyst tools to generate a flood depth raster and flood polygon. The key tool in this process is the Nibble tool that replaces cells of a raster corresponding to a mask with the values of the nearest neighbors and allows you to propagate the flooding from your stream on the terrain. Christine Dartiguenave Esri Water Resources Team ... View more

If you have many streams and a big dem, the tool is probably busy working. It is editing the dem under each cell under the streams. Note that this is an older tool that has not been optimized. This tool has now been "replaced" by the Create Drainage Line Structures/Adjust Flow Direction in Streams tools. These 2 tools will not burn the elevation in the DEM under the streams anymore but they will ensure that the flow direction goes in the digitized direction of the streams once the water reaches them. We have left Assign Stream Slope/Burn Stream Slope in the menu as we do not like to take away tools from the users, but you should now try to use Create Drainage Line Structures/Adjust Flow Direction in Streams instead. Christine Dartiguenave Esri Water Resources Team ... View more

You should be able to do this with the Summary Statistics tool available in the Analysis Tools > Statistics toolset. Select the static water level field as Statistic Field and Min as Statistics type, and as case field(s) a field or combination of fields that uniquely define each location (E.g. X/Y field, locationid - do not use shape for the case field) . Christine Dartiguenave Esri Water Resources Team ... View more