IV. Overlay Soil and Land use data

I.Open and Prepare Map Data
- a.Open ArcGIS
- b.Open a new empty map
- c.Open Data Layers
  - i.Adding a single layer
  - ii.Adding multiple layers
- d.Organizing data layers
- e.Viewing the whole Map
  - i.Opening the "Tools" toolbar
  - ii.Zooming in ArcGIS
- f.Saving the Project
II.Setting Color and Symbol Schemes
III.Delineate Watershed
- a.Open Editor Toolbar
- b.Organize Layers for best view of topography
- c.Draw the watershed boundary
  - i.Delineate the watershed manually using the editor
  - ii.Calculate the Area of the Watershed
IV.Overlay Soil and Landuse data
V.Create SCS Curve Number Map
- a.Finish Curve Number Lookup Table
- b.Create and symbolize Curve Number layers
  - i.Create layer showing areas with a Curve Number of 100
    - 1.Using Definition Query tool
    - 2.Create Layer File
  - ii.Create the remaining Curve Number layers (“CN_84”, “CN_80”, etc.)
    - 1.Create layer showing areas with a Curve Number of 84
    - 2.Create layer file
  - iii.Group and symbolize all curve number layers
    - 1.Group the layers
    - 2.Symbolize “Curve Number” layer
- c.Complete Composite Curve Number Table
  - i.Calculate area of land with curve number value of 100
  - ii.Repeat steps for each individual remaining curve number layer to complete the Composite Curve Number Table
VI.Creating a Layout
- a.Setting Print Area
- b.Layout View
- c.Page orientation
- d.Setting map properties
- e.Adding map features

Here you will add information about soil types and land use to the map. Both soil type and land use can vary within the watershed and make a large difference in the amount of runoff produced. Obviously, there will be many different soil types and land uses within a large watershed. This can make it very difficult to calculate runoff. However, we can use GIS to make this task easier. In this step you will add the data to tables behind the map, and in the following sections you will use ArcGIS to integrate soil type and land use into one parameter.

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