Ag Data Viewer's
Topography module can convert your topography points into a
simple and useful format. There are also tools for removing
unwanted data or poor quality data.
Collecting data
- it is recommended to collect topography data on 45' to 50'
wide passes maximum width. Make sure you drive the ditch
bottoms. Here
is a view of imported data.
Topography image -
is shown here. This will give you the rise and fall within the
field, but does not capture problem areas. This image is the
backbone to all the watershed layers ADV will create.
Watersheds - is
one of the layers created. This layer will show all the water in
an area that wants to flow to a common outlet. Every outlet will
have an individual colored area of the field.
Flow Accumulations
- show where water wants to flow in a field, more importantly
these lines will show you how much water is flowing to a
specific outlet.
Depressions
- layer will display the areas of the field were water is prone
to standing. These are the areas that need work, no more
searching for those wet spots you saw earlier in the season.
Note: The
ditch bottoms were not driven so we get an angle ditch in the
lower left corner of the field that has multiple depressions.
Hills - layer
displays areas of the field that have both slope and elevation
and will be generally shed water quickly.
Profile Tool
- is a part of the Topography package that is very helpful in
drainage planning. As you lay out your drainage paths you can
see how much slope, cut and fill is required for that path. Very
useful in ditch planning.
The lt. blue line in the middle of the
field is represented by the profile line on the bottom of the
window, also there is line information on length, drop, cut and
slope.