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Marine_Investigation__Draft_Report.pdf
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HYDROGRAPHIC SURVEY, HISTORICAL DATA
COLLECTION AND ANALYSIS DATA FOR THE
DESIGN OF INTAKE AND OUTFALL SYSTEM
AT INDEPENDENT WATER AND POWER PLANT
IN MIRBAT, SULTANATE OF OMAN
DRAFT REPORT
February 2010
ALSAFA Environmental & Technical Services LLC
P.O. Box: 3013
Postal Code: 111
Tel: (00968) 24499809
E-mail:
CPO Seeb
Sultanate of Oman
Fax: (00968) 24494750
Web site:
HYDROGRAPHIC SURVEY, HISTORICAL DATA COLLECTION
AND ANALYSIS DATA FOR THE DESIGN OF INTAKE AND
OUTFALL SYSTEM AT INDEPENDENT WATER AND POWER
PLANT IN MIRBAT, SULTANATE OF OMAN
PROPOSAL No: SAFA/100-2009
February 2010
Revisions:
Item Name
Dr. Sana
Field Study and
K. Senathipathi
Report Prepared
Saravanan Kalimuthu
by:
Rashid Al Barwani
Checked and
Masood Ahmed
Approved by:
Revision No. -
Document Ref:
Copyright:
•
•
•
This document has been prepared by ALSAFA Environmental & Technical Services (ALSAFA
ETS) for the above titled project.
ALSAFA ETS accepts no responsibility or liability for this document to any party other than the
client for whom it was commissioned.
This document should not be relied upon or used for any other project without the prior written
authority of ALSAFA ETS.
Date
13
th
February, 2010
15
th
February, 2010
SAFA/100-2009
TABLE OF CONTENTS
1
1.1
2
2.1
2.2
2.3
2.4
3
3.1
3.2
3.3
3.4
4
4.1
4.2
INTRODUCTION ....................................................................................................... 1-1
Background............................................................................................................... 1-1
LOCATION AND SURROUNDING ACTIVITIES ................................................ 2-1
Nearest Tide Station................................................................................................. 2-1
Navigational Channel Details .................................................................................. 2-2
Hydraulic Structure and Harbour Details ............................................................. 2-2
Sea Water Pollution.................................................................................................. 2-2
METHODOLOGY ...................................................................................................... 3-4
Measurement of Tidal Elevations ........................................................................... 3-4
Measurement of Water Quality .............................................................................. 3-4
Measurement of Waves and Currents.................................................................... 3-5
Measurement of Sediment Concentration.............................................................. 3-5
MEASUREMENT RESULTS .................................................................................... 4-7
Tidal elevations ......................................................................................................... 4-7
Water quality measurements................................................................................... 4-1
4.2.1
4.2.2
4.2.3
4.3
4.4
4.5
4.6
Variation of Seawater Temperature............................................................ 4-1
Variation of Seawater Salinity.................................................................... 4-3
Variation of Sediment Concentration......................................................... 4-1
Measured waves and current .................................................................................. 4-1
Wind Speed and Direction....................................................................................... 4-6
Stability of Coastal Sediment .................................................................................. 4-7
4.5.1
4.6.1
4.6.2
4.6.3
4.6.4
4.6.5
4.6.6
4.6.7
4.6.8
4.6.9
4.6.10
4.6.11
4.6.12
4.6.13
4.6.14
4.6.15
4.6.16
Stability of coastal sediment....................................................................... 4-7
Overview .................................................................................................... 4-9
Coastal Ecosystems .................................................................................. 4-10
Habitats..................................................................................................... 4-13
Beach Region............................................................................................ 4-13
Intertidal Zone .......................................................................................... 4-15
Subtidal Zone- Intake Station................................................................... 4-16
Outfall station ........................................................................................... 4-18
Control station .......................................................................................... 4-19
Plankton.................................................................................................... 4-20
Benthic Infauna ........................................................................................ 4-22
Benthic Infaunal Biomass......................................................................... 4-23
Benthic Infaunal Density.......................................................................... 4-24
Sediments Infaunal Relative Abundance.................................................. 4-25
Phytoplankton........................................................................................... 4-26
Primary Production (Chlorophyll- a) ....................................................... 4-28
Conservation status of the project site...................................................... 4-29
Marine Ecology......................................................................................................... 4-9
4.6.17
5
5.1
5.2
5.3
Conclusion................................................................................................ 4-30
HISTORICAL OCEANOGRAPHIC DATA ............................................................ 5-1
Seawater Temperature Data (Three Hottest month) ............................................ 5-1
Seawater Temperature over the Years................................................................... 5-2
Tide ............................................................................................................................ 5-3
5.3.1
5.3.2
5.3.3
General Tidal Characteristics ..................................................................... 5-3
Historical Tide Data ................................................................................... 5-4
Historical waves and current data............................................................... 5-7
Storm Surge................................................................................................ 5-8
Tsunami .................................................................................................... 5-13
5.4 Historical Storm Surge and Tsunami ..................................................................... 5-8
5.4.1
5.4.2
List of Figure
F
IGURE
2-1: IWPP S
ALALAH
P
ROJECT
S
ITE
........................................................................................... 2-1
F
IGURE
2-2: T
IDE GAGE STATION AND DISTANCE
................................................................................... 2-2
F
IGURE
2-3: S
EA WEEDS AT INTAKE AREA
.............................................................................................. 2-3
F
IGURE
3-1 C
ONTROL PANEL FOR PRESSURE SENSOR
............................................................................. 3-4
F
IGURE
3-2 P
RESSURE SENSOR
............................................................................................................... 3-4
F
IGURE
3-3 IDRONAUT-316 CTD P
ROBE FOR WATER QUALITY MEASUREMENTS
...............................3-5
F
IGURE
3-4 ADCP
DEPLOYED AT THE PROJECT SITE
.............................................................................. 3-6
F
IGURE
4-1 M
EASURED AND PREDICTED TIDAL ELEVATIONS FOR
T
AQA PROJECT SITE
..........................4-7
F
IGURE
4-2 M
EASURED AND PREDICTED TIDAL ELEVATIONS FOR FOUR DAYS
....................................... 4-8
F
IGURE
4-3: V
ARIATION OF
T
EMPERATURE IN THE
W
ATER
C
OLUMN
(S
PRING
T
IDE
)............................. 4-1
F
IGURE
4-4: V
ARIATION OF
T
EMPERATURE IN THE
W
ATER
C
OLUMN
(M
IXED
T
IDE
) .............................4-2
F
IGURE
4-5: V
ARIATION OF
T
EMPERATURE IN THE
W
ATER
C
OLUMN
(N
EAP
T
IDE
)................................ 4-2
F
IGURE
4-6: V
ARIATION OF
S
ALINITY IN THE
W
ATER
C
OLUMN
(S
PRING
T
IDE
) .....................................4-3
F
IGURE
4-7: V
ARIATION OF
S
ALINITY IN THE
W
ATER
C
OLUMN
(M
IXED
T
IDE
)...................................... 4-4
F
IGURE
4-8: V
ARIATION OF
S
ALINITY IN THE
W
ATER
C
OLUMN
(N
EAP
T
IDE
) ........................................4-4
F
IGURE
4-9 M
EASURED WAVE HEIGHT AT
T
AQA PROJECT SITE
.............................................................. 4-1
F
IGURE
4-10 M
EASURED PEAK WAVE PERIOD AT
T
AQA PROJECT SITE
................................................... 4-2
F
IGURE
4-11 P
EAK WAVE PERIOD VERUS MAXIMUM WAVE HEIGHT
....................................................... 4-3
F
IGURE
4-12 M
EAN WAVE DIRECTION AT
T
AQA PROJECT SITE
............................................................... 4-3
F
IGURE
4-13 R
OSE DIAGRAM FOR MAXIMUM WAVE HEIGHT AT
T
AQA PROJECT SITE
.............................. 4-4
F
IGURE
4-14 C
URRENT MAGNITUDE AT
1.6
M ABOVE SEABED
................................................................ 4-5
F
IGURE
4-15 C
URRENT DIRECTION AT
1.6
M ABOVE SEABED
.................................................................. 4-5
F
IGURE
4-16 R
OSE DIAGRAM FOR MEAN CURRENT AT
T
AQA PROJECT SITE
............................................ 4-6
TH
F
IGURE
4-17: W
IND
R
OSE DURING
18
TO
24
THH
D
ECEMBER
2009...................................................... 4-7
F
IGURE
4-18 P
ARTICLE
S
IZE
D
ISTRIBUTION OF THE
S
EABED
S
AMPLE
A
T
T
AQA
S
ITE
............................4-8
F
IGURE
4-19 S
EDIMENT
S
TABILITY
P
ARAMETER OF
C
OASTAL
S
EDIMENTS AT
T
AQA
P
ROJECT
S
ITE
......4-9
F
IGURE
4-20: M
AP OF
D
HOFAR
C
OAST
................................................................................................ 4-10
F
IGURE
4-21: H
ABITAT
M
AP AND
M
ARINE
S
URVEY
L
OCATIONS
. ........................................................4-12
F
IGURE
4-22: V
EGETATED DUNE CORDON
............................................................................................ 4-13
2
F
IGURE
4-23: B
ENTHIC INFAUNAL BIOMASS
(
G
/
M
- )............................................................................ 4-24
2
F
IGURE
4-24: B
ENTHIC INFAUNAL DENSITY
(
INDIVIDUALS
/
M
- ).......................................................... 4-24
F
IGURE
4-25: B
IODIVERSITY INDICES OF THE IDENTIFIED TAXA
...........................................................4-25
F
IGURE
4-26: R
ELATIVE
A
BUNDANCE OF
P
HYTOPLANKTON
G
ROUP
................................................... 4-28
F
IGURE
4-26: C
ORAL DISTRIBUTION IN
O
MAN
..................................................................................... 4-29
F
IGURE
5-1: S
EAWATER
T
EMPERATURE
V
ARIATION OF
T
HREE
H
OTTEST
M
ONTHS IN
1988 .................5-1
F
IGURE
5-2: S
EAWATER
T
EMPERATURE
V
ARIATION OF
T
HREE
H
OTTEST
M
ONTHS IN
1995 .................5-1
F
IGURE
5-3: V
ARIATION OF
S
EAWATER
T
EMPERATURE OVER THE
Y
EARS
............................................ 5-2
F
IGURE
5-4: T
YPICAL TIDAL ELEVATION FOR
P
ORT
S
ALALAH
................................................................ 5-4
F
IGURE
5-5: C
UMULATIVE
F
REQUENCY OF
T
IDAL
E
LEVATIONS
F
ROM
1990-2009 D
ATA
......................5-5
F
IGURE
5-6: T
IDE
L
EVEL
V
ARIATION
D
URING
T
SUNAMI
..................................................................... 5-13
List of Tables
T
ABLE
4-1: S
URVEY
L
OCATION
........................................................................................................... 4-11
T
ABLE
4-2: Z
OOPLANKTON COMPOSITION AND DENSITY OF OCCURRENCE
.......................................... 4-21
T
ABLE
4-3: L
IST OF INFAUNAL SPECIES AT THE PROPOSED SITE
........................................................... 4-22
T
ABLE
4-4: P
HYTOPLANKTON
S
AMPLING
L
OCATION
........................................................................... 4-26
T
ABLE
4-5: P
HYTOPLANKTON COMPOSITION AND DENSITY AT INTAKE AND OUTFALL LOCATION
........4-27
T
ABLE
4-6: A
BUNDANCE
(%)
OF PHYTOPLANKTON GROUP AT INTAKE AND OUTFALL LOCATION
........4-28
T
ABLE
4-7: N
UMBERS OF THREATENED SPECIES
(S
EA
T
URTLES
). ........................................................ 4-30
T
ABLE
5-1: S
EAWATER
T
EMPERATURE
D
ATA OVER THE
Y
EARS
............................................................ 5-2
T
ABLE
5-2: H
ARMONIC CONSTANTS FOR TIDE AT
S
ALALAH
................................................................... 5-3
T
ABLE
5-3: M
AIN
T
IDAL
E
LEVATIONS FOR
P
ORT
S
ALALAH
................................................................... 5-4
T
ABLE
5-4: T
IDAL
E
LEVATIONS
B
ASED ON
C
UMULATIVE
F
REQUENCY
................................................. 5-6
T
ABLE
5-5: M
ONTHLY
A
VERAGE
, M
AXIMUM AND MINIMUM
T
IDAL
E
LEVATIONS
................................. 5-6
T
ABLE
5-6: M
AXIMUM WAVE HEIGHT RECORD FOR
P
ORT
S
ALALAH
(A
LL THE WAVE HEIGHTS ARE IN
METERS
) ....................................................................................................................................... 5-7
T
ABLE
5-7: M
AXIMUM
W
AVE
H
EIGHT VERSUS
R
ETURN
P
ERIOD
...........................................................5-7
TH
T
ABLE
5-8: 26 D
ECEMBER
2004 T
SUNAMI IN
S
ALALAH
.................................................................... 5-13
T
ABLE
5-9: S
UMMARIES OF
T
SUNAMIS RELATED TO
A
RABIAN
P
ENINSULA
......................................... 5-14
List of Plates
P
LATE
4-1: G
HOST CRABS
O
CYPODE
S
P
............................................................................................... 4-14
P
LATE
4-2: R
EPRODUCTIVE MOUNTS OF
O
CYPODE SP
.......................................................................... 4-14
P
LATE
4-3: T
URTLE NESTING TRACK
. ................................................................................................... 4-14
P
LATE
4-4: L
OGGERHEAD
T
URTLE
....................................................................................................... 4-14
P
LATE
4-5: P
LASTIC MATERIALS
.......................................................................................................... 4-14
P
LATE
4-6: A
BANDONED FISHING TRAPS
.............................................................................................. 4-14
P
LATE
4-7: H
ERMIT CRAB
.................................................................................................................... 4-15
P
LATE
4-8: G
HOST CRABS
................................................................................................................... 4-15
P
LATE
4-9: R
OCKY INTERTIDAL REGION
. ............................................................................................. 4-15
P
LATE
4-10: R
OCK OYSTER
(S
ACCOSTREA SP
.)
AND GREEN ALGAE
. ......................................................4-15
P
LATE
4-11: S
EA URCHIN
...................................................................................................................... 4-16
P
LATE
4-12: W
RASSE FISH
T
HALASSOMA SP
.......................................................................................... 4-16
P
LATE
4-13: S
CARUS SP
........................................................................................................................ 4-16
P
LATE
4-14: C
HEILODIPTERUS SP
......................................................................................................... 4-16
P
LATE
4-15: P
TEROIS SP
....................................................................................................................... 4-17
P
LATE
4-16: M
ORAY EEL
..................................................................................................................... 4-17
P
LATE
4-17: S
PONGES
( P
ORIFERA
) ...................................................................................................... 4-17
P
LATE
4-18: S
CHOOL OF FISHES
........................................................................................................... 4-17
P
LATE
4-19: S
PONGES
.......................................................................................................................... 4-17
P
LATE
4-20: H
ARD
C
ORAL
F
AVIA SP
.................................................................................................... 4-17
P
LATE
4-21: T
YPICAL SANDY BOTTOM AT THE OUTFALL
..................................................................... 4-18
P
LATE
4-22: R
ED ALGAE AND GREEN ALGAE
....................................................................................... 4-19
P
LATE
4-23: S
CHOOL OF FISHES
.......................................................................................................... 4-19
P
LATE
4-24: S
PONGES
.......................................................................................................................... 4-19
P
LATE
4-25: E
PAULET GROUPER
E
PINEPHELUS STOLICZKAE
................................................................. 4-19
P
LATE
4-26: I
NDO
-P
ACIFIC
S
ERGEANT
A
BUDEFDUF VAIGIENSIS
........................................................... 4-20
P
LATE
4-27: L
ONGFIN
B
ANNERFISH
H
ENIOCHUS ACUMINATUS
........................................................... 4-20
P
LATE
4-28: W
RASSE FISH
T
HALASSOMA SP
.......................................................................................... 4-20
P
LATE
4-29: P
ORCUPINE FISH
D
IODON HYSTRIX
................................................................................... 4-20
P
LATE
4-30: S
TANDARD
Z
OOPLANKTON
N
ET
...................................................................................... 4-21
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