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United States. Army. Corps of Engineers. New Engla.

Monitoring cruise at the Central Long Island Sound Disposal Site, Aug. & Sep. 1987 online

. (page 12 of 12)
Online LibraryUnited States. Army. Corps of Engineers. New EnglaMonitoring cruise at the Central Long Island Sound Disposal Site, Aug. & Sep. 1987 → online text (page 12 of 12)
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SHELL = Shell lag deposits



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CAP SITE 1
JULY 1986




.4 .8 1.2 1.6

BOUND ARY ROUGH HESS (CM



2.0



104-



CAF SITE 2
JULY 1986




N = 17



.4 .8 1.2 1.6 2.0

BOUNDARY ROUGHNESS (CM)



Figure 3-44. Frequency distributions of small-scale boundary
roughness values at CS-1 and CS-2 in July 1986.



CAP SITE 1
JULY 1986




154-



16 -



MEftH RPD DEPTH <CN>



CAP SITE 2
JULY 1986




N = 1?



012345678
MEAN RPD DEPTH (CM)



Figure 3-45. Frequency distributions of mean apparent RPD
depths at CS-1 and CS-2 in July 1986.



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Figure 3 -4 7a. REMOTS* image from station Center at CS-1. The
image shows deep RPD depths and feeding voids, which
are evidence of Stage III taxa. This mound apex
station shows no evidence of physical disturbance.
Scale = IX.




Figure 3-47b.



REMOTS^ image from station Center at CS-2. The
image shows deep RPD depths and feeding voids, which
are evidence of Stage III taxa. This mound apex
station shows no evidence of physical disturbance.
Scale = IX.



104



CAP SITE 1
JULY 1966



H = 17



5 -




1



ORG.-SED. INDEX UftLUE



104-



CAP SITE 2
JULY 1966




1 2 3 4 5 6 7 8 9 10 11
ORG.-SED. INDEX UALUE



Figure 3-49. Frequency distributions of REMOTS® Organism-
Sediment Indices (OSI's) at the CS-1 and CS-2
disposal mounds, July 1986.



Figure 3-51. Benthic "process" map which indicates the
distribution and thickness (cm) of apparent dredged
material at the MQR disposal mound in July 1986.
Symbols are defined as follows:

# = Apparent dredged material thickness (cm)

#+ = Apparent dredged material thicker than REMOTS*
window penetration

NDM = No apparent dredged material

S/M = Sand over mud stratigraphy

CH 4 = Methane gas present



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Figure 3-52a. REMOTS® image from station 2 00E showing
methane gas bubbles (arrows) in the sediment.
Scale = IX.



Figure 3-52b. REMOTS® image from station 200N showing
methane gas bubbles (arrows) in the sediment.
Scale = IX.




HQR
JULY 1986



4 .8 1.2 1.6 2.8 2.4 2.1

BOUNDARY ROUGHNESS (CM)



Q 15 -
U




2 3 4 5 6
MEAN RPD DEPTH (CM)




123456789 10 11
ORG.-SED. INDEX UALUE



Figure 3-53. Frequency distributions of small-scale boundary
roughness, mean apparent RPD depths and OSI values
at the MQR disposal mound, July 1986.



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Figure 3-56. REMOTS® image from station 200N showing well-
developed feeding voids (evidence of Stage
III taxa) near the apparent RPD boundary.
Scale = IX.




Figure 3-58. REMOTS* image from station 600N showing a shallow
RPD, possibly attributed to local surface erosion
at this station. Scale = IX.



Figure 3-59. Benthic "process" map which indicates the
distribution and thickness (cm) of apparent dredged
material at the Norwalk disposal mound in July 1986.
Hatched area delimits the extent of apparent dredged
material. Symbols are defined as follows:

# = Apparent dredged material thickness (cm)

#+ = Apparent dredged material thicker than REMOTS*
window penetration

NDM = No apparent dredged material

S/M = Sand over mud stratigraphy

SHELL = Shell lag deposit

RS = Reduced sediment near the sediment-water
interface

CH* = Methane gas present



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Figure 3-60. REMOTS® image from station 200W showing low
reflectance sediment at the surface. This
reduced sediment was probably derived from
excavation of a nearby burrow. Scale = IX.



HGRUOLK
JULY I9S6




4 6 1.2 1.6 20 2.4
BOUHDfiRV ROUGHNESS (CM)



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12 3 4 5 6
MEAN RPD DEPTH (CM)



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HORUALK
JULY 1986



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orc.-sed. ihoe:: ualue



Figure 3-61. Frequency distributions of small-scale boundary
roughness, mean apparent RPD depths and OSI values
at the Norwalk disposal mound, July 1986.



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Figure 3-65. REMOTS® image from station Center at NH-74
showing a very thin surface sand layer and
shallow RPD depth, suggesting recent erosion
of aerated surface sediments which once
comprised the sand cap at this mound. Scale
= IX.



Figure 3-66. Benthic "process" map which indicates the
distribution and thickness (cm) of apparent dredged
material at the NH-74 disposal mound in July 1986.
Symbols are defined as follows:

# = Apparent dredged material thickness (cm)

#+ = Apparent dredged material thicker than REMOTS*
window penetration

NDM = No apparent dredged material

S/M = Sand over mud stratigraphy



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NEW HA'JEN 74
JULY 1986




.4 .8 1.2 1.6 2.0 24

BOUNDARY ROUGHHESJ. (CM)



NEW HAUEU 74
JULY 1986



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12 3 4 5 6
MEAN RPD DEPTH (CM;



WCU HAUEU 74
JULY 1986



= 17

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ORG -SED. INDEX UALUE



Figure 3-67. Frequency distributions of small-scale boundary
roughness, mean apparent RPD depths and OSI values
at the NH-74 disposal mound, July 1986.



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Figure 3-71. Benthic "process" map which indicates the
distribution and thickness (cm) of apparent dredged
material at the NH-83 disposal mound in July 1986.
Symbols are defined as follows:

# = Apparent dredged material thickness (cm)

#+ = Apparent dredged material thicker than REMOTS®
window penetration

NDM = No apparent dredged material

S/M = Sand over mud stratigraphy

RS = Reduced sediment near the sediment-water
interface



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NEW Hn"EN 83
JULY l-t:t.



4 .81.21.62.82.42.83.23
BOUNDARY ROUGHNESS (CM/



NEW Hh'.'EH 83
JULY 1986




MEAN RPD DEFTH (CM)



NEW HAMEN 83
JULY 1986



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1 2 -5 4567 891611
ORG. -SED. INDEX UhLUE



Figure 3-72. Frequency distributions of small-scale boundary
roughness, mean apparent RPD depths and OSI values
at the NH-83 disposal mound, July 1986.



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Figure 3-76. Benthic "process" map which indicates the
distribution and thickness (cm) of apparent dredged
material at the new CLIS-86 disposal mound in July
198 6. The solid contour line indicates a
"conservative" estimate of the extent of the deposit
as determined by REMOTS*. The broken contour line
indicates the extent of the mound as determined by
precision bathymetry (see Figure 3-4) . Symbols are
defined as follows:

# = Apparent dredged material thickness (cm)

#+ = Apparent dredged material thicker than REMOTS®
window penetration

NDM = No apparent dredged material

S/M = Sand over mud stratigraphy



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JULY l?ft



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BOUHDuPY ROUGHNESS <CM)



III



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MEAN RPD DEPTH (CM)



CLI£ S£
JULY 1986



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612 34567691011
ORG -SED JUDEX UftLUE



Figure 3-77. Frequency distributions of small-scale boundary
roughness, mean apparent RPD depths and OSI values
at the CLIS-86 disposal mound, July 1986.




Figure 3-79. REMOTS® image from station 2 00SE showing a
thin layer of low reflectance sediment
overlying high reflectance sediment. Scale =
IX.




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Figure 3-83. Frequency distributions of small-scale boundary-
roughness, mean apparent RPD depths and OSI values
at the GHOST-1 site, July 1986.






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Figure 3-87- Frequency distributions of small-scale boundary
roughness, mean apparent RPD depths and OSI values
at the GHOST-2 site, July 1986.







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1 2 3 4 5 6 7 8 9 10 12

Online LibraryUnited States. Army. Corps of Engineers. New EnglaMonitoring cruise at the Central Long Island Sound Disposal Site, Aug. & Sep. 1987 → online text (page 12 of 12)