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1. For ‘Input Features’, drag in the SubwatershedsNew layer from the Contents pane or select the SubwatershedsNew option from the drop down box.
2. For ‘Output Feature Class’, rename the feature class from “SubwatershedsNew_Dissolve” to “Subbasin”“Subbasin”.
3. For ‘Dissolve_Field(s)’, select the HUC_8 field, since this is the field containing the common subbasin value you wish to dissolve on.
4. Ensure your ‘Dissolve’ window appears as shown below, and click Run.
   
   
   
   
5. In the Contents pane, toggle the new Subbasin layer off and on to get a better idea of the result of the Dissolve tool.
6. In the Contents pane, right-click the Subbasin layer and select Attribute Table.

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1. In the Contents pane, click the rectangle symbol beneath the Subbasin layer name to open the ‘Symbology’ tab.
2. On the top of the tab, click Properties the Properties tab.
   

1.  For ‘Color:’, use the drop-down menu to select No Color.
2. For ‘Outline Color:’, used the drop-down menu to select Black.
3. For ‘Outline Width:’, type “2”.
4. Click Apply.

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1. Repeat steps above, but for ‘Output Feature Class’, rename the feature class “Watersheds” “Watersheds” and for ‘Dissolve_Field(s)’, check the HU_10_NAME field.

You no longer need the original subwatersheds layer for this section. The rest of the analysis will be done with the new Watersheds layer.

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1. In the Contents pane, right-click the Watersheds layer and select Symbology.
2. Use the drop-down menu to select Unique values.
3. Use the ‘Value Field’ drop-down menu to select the HU_10_NAME field.
4. Use the ‘Color Scheme’ drop-down menu to select the color ramp of your choice.
   
   

While you could have also dissolved using the HU_10 field, the watershed name is probably more meaningful to you than the HU_10 code.

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Depending on your screen size, you may notice the easternmost watershed does not get labeled if there is not adequate space for the required text. This could be adjusted using advanced labeling techniques, but you will leave the map as is.

Creating a layout

1. On the main tabribbon, click Insert  the Insert > New Layout > ANSI Landscape > Letter.
2. Click Insert tab and click Map Frame.
3. Select the Lab1 map under Map.
   

1. Select Layout tab and click Activate Activate.
2. Right-click Watersheds  the Watersheds layer and click Zoom  Zoom to Layer.
3. Select Layout tab and click Close Activation.
   

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1. On the Main menu, select Select By Location….
2. For ‘Input Feature Layer’, use the drop-down menu to select Flowline.
3. For ‘Relationship’, use the drop-down menu to select "Have their center in".
4. For ‘Selecting Features’, check the Subbasin layers.

This setting ensures that catchments and flowlines which share the outside border with the subbasin will not also get selected.

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1. Export the selected Flowline features into your HydrologyLab geodatabase and name the new feature class “Flowlines”“Flowlines”.
2. Remove the original Flowline layer from the Contents pane.
3. Repeat step 1-7 using Catchment layer as Input Feature Layer and name the new feature class “Catchments”“Catchments”.
4. Uncheck the Catchments layer, so it is no longer visible.
5. In the Contents pane, click the line symbol beneath the Flowlines layer name.
6. In the ‘Symbology’ window under Gallery, select the Water (line) symbol.
7. Open the Flowlines attribute table.
8. Right-click the LENGTHKM field and select Statistics….

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1. On the Map tab, click the Explore button.
2. In the Map Display, click on any of the soil classes.

By default, you will see all of the attributes of the top-most layer, which is currently the Subbregion (Subbasin) layer. In order to see the attributes of the Map Units (soils) layer:

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1. For ‘Input Features’, use the drop-down menu to select the Map Units layer.
2. For ‘Clip Features’, use the drop-down menu to select the Subbasin layer.

Notice that the ‘Output Feature Class’ did not default to your HydrologyLab geodatabase, but instead to the default geodatabase that was referenced in the map package you downloaded.

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1. Click Properties. Use the ‘Outline Color:’ drop-down menu to select No  No Color.
2. Click Apply Apply.
3. Symbolize the Subbasin layer using the same symbology as you used in the  Lab1 map document.

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