Assignment
6 – Soils and Land Use of the Pecos River Headwaters Area
This assignment served as an introduction to soil data
from STATSGO (State Soil Geographic database), which is maintained by
National Resources Conservation Service (NRCS), as well as
an introduction to the application of land use data, which, in this case,
is categorized according to the Anderson Land Use Code
classification system. The Area of Study for this assignment is, again,
the Pecos River Headwaters Area.
The key elements of this assignment
were:
- to be able to access and
download the NRCS data;
- to add the associated and
relevant tabular data to the map project;
- to join and relate the
tabular data in appropriate and meaningful ways;
- to access and download the
appropriate land use maps (1:250k) from RGIS;
- associate the soils and
the landuse maps into one coherent layer.
Because
this project had a great deal to do with the tabular data associated to the
mapped layers and its varied analysis,
there
are several tables that are included on this page, following this layout.
Vertically Integrating Soil Properties Over the Layers
For
Map Unit NM963, how many layers does each component have?
|
Component Number |
Number of Layers |
Percent of Map
Unit |
|
|
|
|
|
Component 1 |
3 |
27 |
|
Component 2 |
2 |
27 |
|
Component 3 |
1 |
18 |
|
Component 4 |
3 |
12 |
|
Component 5 |
3 |
7 |
|
Component 6 |
2 |
5 |
|
Component 7 |
3 |
2 |
|
Component 8 |
4 |
2 |
What
is the total soil depth (inches) for each layer and the average depth (inches)
for the map unit?
|
Component
Number / Layer |
Soil Depth (in.) |
Avg.
Depth for Map Unit (in
inches) = Sum over all components of (comppct/100) * component depth |
|
Component 1 |
|
|
|
Layer 1 |
9 |
|
|
Layer 2 |
9 |
|
|
Layer 3 |
4 |
|
|
Total |
22 |
5.9 |
|
Component 2 |
|
|
|
Layer 1 |
8 |
|
|
Layer 2 |
12 |
|
|
Total |
20 |
5.4 |
|
Component 3 |
|
|
|
Layer 1 |
60 |
10.8 |
|
Component 4 |
|
|
|
Layer 1 |
6 |
|
|
Layer 2 |
18 |
|
|
Layer 3 |
4 |
|
|
Total |
28 |
3.4 |
|
Component 5 |
|
|
|
Layer 1 |
9 |
|
|
Layer 2 |
9 |
|
|
Layer 3 |
4 |
|
|
Total |
22 |
1.5 |
|
Component 6 |
|
|
|
Layer 1 |
8 |
|
|
Layer 2 |
12 |
|
|
Total |
20 |
1.0 |
|
Component 7 |
|
|
|
Layer 1 |
9 |
|
|
Layer 2 |
9 |
|
|
Layer 3 |
4 |
|
|
Total |
22 |
0.4 |
|
Component 8 |
|
|
|
Layer 1 |
4 |
|
|
Layer 2 |
11 |
|
|
Layer 3 |
10 |
|
|
Layer 4 |
35 |
|
|
Total |
60 |
1.2 |
|
Average Depth of Map Unit
NM963 |
|
29.7 inches |
What
is the total water holding capacity (inches of water) over the full soil depth
for each component?
What
is the average water holding capacity (inches of water) for soils in this map
unit?
|
Component
Number / Layer |
Water Holding
Capacity By Layer and
Component Total (in inches) |
Avg.
Water Holding Capacity Map Unit (in
inches) = Sum over all its components of (comppct/100) * Water Holding Capacity per Component |
|
Component 1 |
|
|
|
Layer 1 |
1.71 |
|
|
Layer 2 |
1.35 |
|
|
Layer 3 |
0.0 |
|
|
Total |
3.06 |
0.83 |
|
Component 2 |
|
|
|
Layer 1 |
1.0 |
|
|
Layer 2 |
0.0 |
|
|
Total |
1.0 |
0.27 |
|
Component 3 |
|
|
|
Layer 1 |
0.0 |
0.00 |
|
Component 4 |
|
|
|
Layer 1 |
0.78 |
|
|
Layer 2 |
2.52 |
|
|
Layer 3 |
0.00 |
|
|
Total |
3.30 |
0.40 |
|
Component 5 |
|
|
|
Layer 1 |
1.71 |
|
|
Layer 2 |
1.35 |
|
|
Layer 3 |
0.00 |
|
|
Total |
3.06 |
0.21 |
|
Component 6 |
|
|
|
Layer 1 |
1.00 |
|
|
Layer 2 |
0.00 |
|
|
Total |
1.0 |
0.05 |
|
Component 7 |
|
|
|
Layer 1 |
1.08 |
|
|
Layer 2 |
1.35 |
|
|
Layer 3 |
0.00 |
|
|
Total |
2.43 |
0.05 |
|
Component 8 |
|
|
|
Layer 1 |
0.40 |
|
|
Layer 2 |
0.77 |
|
|
Layer 3 |
0.60 |
|
|
Layer 4 |
1.75 |
|
|
Total |
3.52 |
0.07 |
|
Avg. Water
Holding Capacity For Map Unit NM963 |
|
1.88 inches |
Considering Land
Use In This Area
