CE 547: Assignment 5

The purpose of this homework was to manipulate STATSGO data within the Upper Pecos Watershed.

The following steps were taken:

1. Connect to FTP and download instructor provided data.

2. Add NM STATSGO data.

3. Address tilt in depiction of NM state by clicking right-clicking Properties>Coordinate System>Modify. Change Central Meridian to -106.

4. Change symbology to reflect diversity of data.

5. Isolate upper Pecos watershed by using the clip tool.

6. Import NM state symbology to clipped upper Pecos watershed.

7. Add comp, layer, and mapunit tables.

8. Join tables tables by MUID.

Part 1:

1. Describe the NM963 soil in terms of its properties in the Mapunit and Component Tables.

NM963 is an undeveloped soil type consisting of D, and C horizons.

2. How many components does it have?

5.

3. What are their names?

Regnier, Latom, Rock Outcrop, Los Tanos, and Gallen.

4. What percentage of the map unit does each component comprise?

Regnier 27%, Latom 27%, Rock Outcrop 18%, Los Tanos 12%, Gallen 2%.

5. What is the predominant surface slope where this soil unit is found?

0-3% slope with some areas of greater slope.

6. What is the dominant soil texture?

Fine Sandy Loam (FSL).

7. What percentage of the soil is in hydrologic soil groups A, B, C, D?

A: 0%; B 2%; C 12%; D 86%.

8. Do these soil properties make sense considering where this soil is located?

Yes. The fine texture of the soils are likely to be found downstream, in a lower gradient context.

Part 2:

1. For mapunit NM963, how many layers does each component have?
2. What is the total soil depth (inches) for each layer and the average depth (inches) for the map unit?
3. What is the total water holding capacity (inches of water) over the full soil depth for each component?
4. What is the average water holding capacity (inches of water)for soils in this map unit?