Assignment
6:
The New Mexico
State Soil Geographic (STATSGO) and the USGS
Land Use/Land Cover (LULC) coverages were
extracted and then clipped for this assignment.
The Arc Toolbox ‘Clip’ was applied to trim the boundary of the Pecos Headwaters
– HUC 13060001 like a cookie cutter.
This assignment has two parts: first, the soil coverage will be utilized
to determine the soil components of map unit identification (MUID) # NM963, and
second, the Santa Fe and Fort Sumner LULC 1:250,000 Quads will be merged to
determine the types of land uses and land covers exist within Pecos Headwaters.
The Pecos
Headwaters soil coverage identifies 86 MUID numbers which each map unit may
encompass several soil components. The
map (below) shows a colorful array of MUID polygons representing soil types
within the Pecos Headwaters by adjusting the color scheme using the symbology within the layer properties.
1. The MUID#
NM963 is represented by two areas or polygons at the south end of Pecos
Headwaters. The NM963 is composed of
eight soil components: Regnier, Latom,
Rock Outcrop, Los Tanos
& Gallen (See map and table below). The smaller map is the entire Pecos
Headwaters (HUC 13060001) that highlights the selected NM963 polygons as the
second data frame.
The table
(below) presents the percentage of each soil component is comprised within the
map unit - NM963.
|
# |
Component Name |
Occupancy % |
|
1 |
REGNIER |
27% |
|
2 |
LATOM |
27% |
|
3 |
ROCK OUTCROP |
18% |
|
4 |
LOS TANOS |
12% |
|
5 |
REGNIER |
7% |
|
6 |
LATOM |
5% |
|
7 |
REGNIER |
2% |
|
8 |
GALLEN |
2% |
The
predominant surface slope is between 15 to 35 based on the lower and the upper
limit of surface slopes for the soil components (SLOPEL & SLOPEH). The dominant soil texture (SURFTEX) is Fine
Sandy Loam (FSL) based on the percentage of map unit occupied by this component
(COMPACT) (See the table below).
|
# |
NAME |
COMPPCT |
SLOPEL |
SLOPEH |
SURFTEX |
|
1 |
REGNIER |
27 |
3 |
15 |
CL |
|
2 |
LATOM |
27 |
1 |
15 |
FSL |
|
3 |
ROCK OUTCROP |
18 |
0 |
99 |
UWB |
|
4 |
LOS TANOS |
12 |
0 |
5 |
FSL |
|
5 |
REGNIER |
7 |
15 |
35 |
CL |
|
6 |
LATOM |
5 |
15 |
40 |
GR-FSL |
|
7 |
REGNIER |
2 |
30 |
80 |
GR-FSL |
|
8 |
GALLEN |
2 |
2 |
35 |
GR-LS |
The percentages
of the hydrologic soil groups (A to D) table presents clayey and poorly drained
soils for majority of the NM963 areas which justifies the downstream areas tend
to display mixed soils within a watershed.
|
Hydrologic Soil Group |
Percent |
|
A ( |
0% |
|
B
(Intermediate) |
2% |
|
C
(Intermediate) |
12% |
|
D (Clayey,
poorly drained) |
86% |
Finally, the
vertical integrating soil properties were observed by the number of layers,
soil depth, available water capacity and water holding capacity for each soil
component by joining the layer tables as a many to one joint: COMP and Pecos
Headwaters soils in the ArcMap.
|
# |
Component Name |
# of Soil Layers |
Total Depth (in) |
Water holding Capacity (in) |
|
1 |
REGNIER |
3 |
22 |
3.06 |
|
2 |
LATOM |
2 |
20 |
1.04 |
|
3 |
ROCK
OUTCROP |
1 |
60 |
0.0 |
|
4 |
LOS
TANOS |
3 |
28 |
3.30 |
|
5 |
REGNIER |
3 |
22 |
3.06 |
|
6 |
LATOM |
2 |
20 |
1.04 |
|
7 |
REGNIER |
3 |
22 |
2.43 |
|
8 |
GALLEN |
4 |
60 |
3.52 |
The average water holding capacity is
1.89 inches through an average soil depth of 29.68 inches.
2. The Land
Use and Land Cover (LULC) for
|
Range |
Type of LULC |
|
0-10 |
Unknown |
|
10-19 |
Urban |
|
20-29 |
Agriculture |
|
30-39 |
Rangeland |
|
40-49 |
|
|
50-59 |
Water |
|
60-69 |
Wetlands |
|
70-79 |
Barren |
The land
use/land covers were entered manually with break values ranging from 0 thru 79
by applying the classification method for the layer properties. Here, the legend shows the types of use and
cover by selected markers which reveals the northern half of the Pecos
Headwaters is mostly forest areas while the southern half is used as rangeland.
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