WSP11837

• File Number: 8200.760
• Description: Yampa River General
• State: CO
• Basin: Yampa/White
• Water Division: 6
• Date: 10/1/1978
• Author: USGS
• Title: Preliminary Applications of Landsat Images and Aerial Photography for Determining Land-Use - Geologic - and Hydrologic Characteristics - Yampa River Basin - Colorado and Wyoming - October 1978
• Water Supply Pro - Doc Type: Report/Study

remote-sensing data are contained in the Supplemental Information section of
this report.

Multispectral-scanner (MSS) data were selected for use in the Landsat
applications. Three images encompassing the general area of northwestern
Colorado were selected for analysis (fig. 2), The dates of acquisition and
scene-identification numbers of the images are as follows:

1. February 25, 1975, Scene 1947-17030.

2, February 26, 1975, Scene 1948-17084.

3, August 24, 1975, Scene 5127-16532.

The images for February 25 and August 24 encompass the same geographical
region which includes the eastern part of the Yampa River basin. The image
for February 26 includes most of the western part of the basin.

Data for the three images included: (1) Computer-compatible digital
tapes of the February 26 and August 24, 1975, images; (2) color-composite
1:1 ,OOO,OOO-scale photographs of the August 24, 1975, image; and (3) band-7
black-and-white l:l,OOO,OOO-scale photographs of the February 25 and 26,1975,
images. The main rationale for selection of 1975 Landsat images was the fact
that good qual ity imagery for both summer and winter seasons existed and that
digital tapes for the images were available at the U.S, Geological Survey's
EROS Data Center in Sioux Falls, S. Dak,

Aerial photographs, scale 1 :100,000, taken by the National Aeronautics
and Space Administration's U-2 aircraft were used in the investigation of
turbidity. The photographs used in this investigation were selected from
photography acquired on May 31, 1977, which included the part of the Yampa
River basin south of lat 40037' (fig, 3). Color and color-infrared positive
transparency films were used for the analysis. Detailed information about the
camera systems used and the film characteristics are summarized in table 1,

Table l.--Camera and film specifications, May 31, 1977; U-2 overflight

[Data adapted from National Aeronautics and Space Administration,
flight summary 77-067, 1977]

Camera

Camera 2

Fi ltration-----
Spec t ra 1 band--
F stop---------
Shutter speed--

Wild RC-l0---------------------------
6 inches (153.21 mm)-----------------
High-definition aerochrome infrared,
50-127.
CC 0.05C+0.058+2.2AV-----------------
0.51-0.90 micrometer-----------------
4.0----------------------------------
1/100 second-------------------------

Wi ld RC-l0,
6 inches (153.05 mm).
Aerial color, 50-242.

Sensor type----
Foca 1 1 ength---
Fi 1m tYpe------

2. 2AV,
0.40-0.70 micrometer,
4,0.
1/100 second,

4