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Hargis, W. J.

Nichols, M. M.

English

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"Made iaab nder NASA spons'ors-ip E - 1 07frihe iterest o ei r ,v WidI diS-. 39
semination of Earh Resources Survey.
Program information and without liability
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Organization
Virginia Institute of Marine Science
Gloucester Point, Virginia 23062
Title
Southern Chesapeake Bay Water Color and Circulation Analysis
co Report
Monthly report for the month of June
7 ,-Hm EREP number --
602647 (517)
NASA contract
NAS 6-2327 0 t
0 Principal Investigator O,
"2 William J. Hargis/ M. Nichols Si
S Date Au _ 71974
Inu
0m4 M Technical Monitor
OH M Dr. David Oberholtzer
NASA-Wallops Station
4 ~f M o Wallops Island, Virginia 23337
S.1.4 Z W
tip. ----- I ,.,-- ------- ---- - ------------------
1E- r-
U 4 DISPERSAL PATTERNS DEDUCED FROM SKYLAB PHOTOGRAPHY
am e Nichols, Maynard M., Virginia Institute of Marine Science,
a W 93 Gloucester Point, Virginia ,23062
H H n a Color and tone patterns of Skylab photography display large scale
Spattern-3 of apparent sediment-laden water that indicates_uspended
a sediment transport. Patterns form massive perturbations, outflow
0' Q " plumes, turbidity maxima and gigantic gyrals. Dispersal is re--
oP 0 t vealed by pattern interpretation, supplemented by surface obser-
(V ba C vations, historical data and by spectral and temporal film analysis.
ro 0 Analysis of lagoons and estuaries shows, 3 modes of transport
U- leading entrapment, redistribution-or escape of sediment depending
on local weather, tide, runoff and circulatory conditions. From
r-H E coastal supply points, i.e..rivers, shores and shoals, sediment
- o is widely dispersed in shelf areas, decreasing exponentially sea-
ward partly by diffusion but mainly by advection. Seaward dis-
persal routes are determined either by cape geometry or by off-
shore density currents and convergence of 'oastal currents. The
relative importance of transport modes for different patterns is
summarized in a graphical model. Usefulness of Skylab photography
for study of large scale dispersal will be documented by examples
from different parts of the world.
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https://ntrs.nasa.gov/search.jsp?R=19740024655 2020-03-23T05:25:47+00:00Z


Southern Chesapeake Bay water color and circulation analysis

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