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Anderson, D. M.

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"Made available under NASA sonsorship
in the. interest of early arij wv'de20is 2- 3
semination of Earth Resources Survey * / H
Program information and without liability - / 9)c
for any use made thereof."
THE USE OF ERTS-1 IMAGERY IN THE NATIONAL PROGRAM
FOR THE INSPECTION OF DAMS
//J/C C)
Discipline: 8 Interpretation Techniques Development
Subdiscipline: C Classification and Pattern Recognition
ERTS-1 imagery can be useful in locating circular water bodies over
152 m (500 ft) in diameter. Dams on streams can be identified by an
abrupt change in stream width. A linear termination on a water body is a.
reliable indication of a dam, particularly when it is inconsistent with the
normal drainage pattern. Care must be exercised to avoid confusing cloud
shadows with water bodies. However, the association of a cloud with its
shadow usually can be accomplished since the sun angle is noted in the data
given on each ERTS image.
The following information generally can be derived from ERTS imagery:
1. The location of water bodies
2. The size and shape of water bodies ;
3. The identification of dam sites on major rivers
4. The direction of stream flow of major hydrologic networks
5. Relative water depths and/or gross, sedimentation patterns
ERTS-l imagery, in general, does not supply information suitable
for determining:
1. Dam height
2. Type of dam constru n.(.concrete or earth fill)
3. Depth of water bodies 'f ,f e, -
4. Location of water bodies less. thian 6 acres
N 1- '- 0
(E72-1 0 3 2 2 ) THE USE OF ERTS-1 IMAGERY N73-1337 0
tIN THE NATIONAL PROGRAM FOR THE
I ~. Anderson (Armyl INSPECTION OF DAMS D.M. Anderson (Army Unclas
lCold Regions Research and Enqineerinq Unclas
Lab.) 20 Dec. 1972 1 p CSCL 08i G3/13 00322
https://ntrs.nasa.gov/search.jsp?R=19730004643 2020-03-23T05:50:35+00:00Z


The use of ERTS-1 imagery in the national program for the inspection of dams

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