Contract
No. HY/2011/03
Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road
Section between Scenic Hill and Hong Kong Boundary Crossing Facilities
Quarterly EM&A Report No.
18 (December 2016 to February 2017)
27
July 2017
Revision 1
Main Contractor Designer
Contents
Executive Summary
1.4 Construction
Works Undertaken During the Reporting Period
2.1 Summary
of EM&A Requirements
3....... Environmental Monitoring and Audit
3.1 Implementation of Environmental Measures
3.2 Air Quality Monitoring Results
3.4 Water Quality
Monitoring Results
3.5 Dolphin
Monitoring Results
3.6 Mudflat Monitoring Results
3.7 Solid and Liquid Waste Management Status
3.8 Environmental Licenses and Permits
4....... Environmental
Complaint and Non-compliance
4.2 Summary of Environmental Complaint,
Notification of Summons and Successful Prosecution
5....... Comments,
Recommendations and Conclusion
Figures
Figure
1.1 Location
of the Site
Figure 2.1 Environmental
Monitoring Stations
Figure
2.2 Transect
Line Layout in Northwest and Northeast Lantau Survey Areas
Appendices
Appendix
A Environmental
Management Structure
Appendix
B Construction
Programme
Appendix
C Location
of Works Areas
Appendix
D Event
and Action Plan
Appendix E Implementation
Schedule of Environmental Mitigation Measures
Appendix
F Site
Audit Findings and Corrective Actions
Appendix
G Air Quality Monitoring Data and
Graphical Plots
Appendix
H Noise Monitoring Data and Graphical
Plots
Appendix
I Water Quality Monitoring Data and
Graphical Plots
Appendix
J Dolphin
Monitoring Results
Appendix
L Summary
of Environmental Licenses and Permits
Executive Summary
The Hong Kong-Zhuhai-Macao Bridge (HZMB) Hong
Kong Link Road (HKLR) serves to connect the HZMB Main Bridge at the Hong Kong
Special Administrative Region (HKSAR) Boundary and the HZMB Hong Kong Boundary
Crossing Facilities (HKBCF) located at the north eastern waters of the Hong
Kong International Airport (HKIA).
The HKLR project has been separated into two
contracts. They are Contract No.
HY/2011/03 Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road-Section between
Scenic Hill and Hong Kong Boundary Crossing Facilities (hereafter referred to
as the Contract) and Contract No. HY/2011/09 Hong Kong-Zhuhai-Macao Bridge Hong
Kong Link Road-Section between HKSAR Boundary and Scenic Hill.
China State Construction Engineering (Hong Kong)
Ltd. was awarded by Highways Department as the Contractor to undertake the
construction works of Contract No. HY/2011/03. The main works of the Contract
include land tunnel at Scenic Hill, tunnel underneath Airport Road and Airport
Express Line, reclamation and tunnel to the east coast of the Airport Island,
at-grade road connecting to the HKBCF and highway works of the HKBCF within the
Airport Island and in the vicinity of the HKLR reclamation. The Contract is part of the HKLR Project
and HKBCF Project, these projects are considered to be ¡§Designated Projects¡¨,
under Schedule 2 of the Environmental Impact Assessment (EIA) Ordinance (Cap
499) and EIA Reports (Register No. AEIAR-144/2009 and AEIAR-145/2009) were
prepared for the Project. The
current Environmental Permit (EP) EP-352/2009/D for HKLR and EP-353/2009/K for
HKBCF were issued on 22 December 2014 and 11 April 2016, respectively. These
documents are available through the EIA Ordinance Register. The construction
phase of Contract was commenced on 17 October 2012.
BMT Asia Pacific Limited has been appointed by
the Contractor to implement the Environmental Monitoring & Audit (EM&A)
programme for the Contract in accordance with the Updated EM&A Manual for
HKLR (Version 1.0) and will be providing environmental team services to the
Contract.
This is the eighteenth Quarterly EM&A report
for the Contract which summarizes the monitoring results and audit findings of
the EM&A programme during the reporting period from 1 December 2016 to 28 February 2017.
Environmental
Monitoring and Audit Progress
The EM&A programme
were undertaken in accordance with the Updated EM&A Manual for HKLR
(Version 1.0). A summary of the
monitoring activities during this reporting period is presented as below:
Monitoring Activity |
Monitoring Date |
|||
December 2016 |
January
2017 |
February
2017 |
||
Air
Quality |
1-hr
TSP |
6, 12, 16, 22 and 28 |
3, 9, 13, 19, 24 and 27 |
2, 7, 13, 17 and 23 |
24-hr
TSP |
5, 9, 15, 21, 24 and 30 |
5, 10, 16, 20 and 26 |
1, 6, 10, 16, 22 and 28 |
|
Noise |
6, 12, 22 and 28 |
3, 9, 19 and 24 |
2, 7, 13 and 23 |
|
Water
Quality |
2, 5, 7, 9, 12, 14, 16, 19, 21, 23, 26, 28
and 30 |
2, 4, 6, 9, 11, 13, 16, 18, 20, 23, 25, 27
and 30 |
1, 3, 6, 8, 10, 13, 15, 17, 20, 22, 24 and
27 |
|
Chinese
White Dolphin |
1, 6, 16 and 19 |
10, 12, 16 and 20 |
7, 9, 16 and 21 |
|
Mudflat
Monitoring (Ecology) |
3, 4, 5, 17, 18 and 19 |
-- |
-- |
|
Mudflat
Monitoring (Sedimentation rate) |
7 |
-- |
-- |
|
Site Inspection |
7, 14, 21 and 30 |
4,
11, 18 and 27 |
3,
8, 15, 22 and 28 |
Due to boat availability, the dolphin monitoring
schedule was rescheduled from 9 December 2016 to 16
December 2016 and from 12 December 2016 to 19
December 2016.
Due to boat availability, the dolphin monitoring
schedule was rescheduled from 19 January 2017 to 16
January 2017 and from 23 January 2017 to 20
January 2017.
Due to weather condition, the dolphin monitoring
schedule was rescheduled from 14 February 2017 to 16 February 2017. Due to boat
availability, the dolphin monitoring schedule was rescheduled from 20 February
2017 to 21 February 2017.
Breaches
of Action and Limit Levels
A summary of environmental exceedances for this
reporting period is as follows:
Environmental Monitoring |
Parameters |
Action Level (AL) |
Limit Level (LL) |
Air Quality |
1-hr TSP |
0 |
0 |
24-hr TSP |
0 |
0 |
|
Noise |
Leq
(30 min) |
0 |
0 |
Water Quality |
Suspended
solids level (SS) |
4 |
0 |
Turbidity
level |
0 |
0 |
|
Dissolved
oxygen level (DO) |
0 |
0 |
|
Dolphin Monitoring |
Quarterly
Analysis (Dec 2016 to Feb 2017) |
0 |
1 |
The Environmental Team investigated all
exceedances and found that they were not project related.
All investigation reports for exceedances of the
Contract have been submitted to ENPO/IEC for comments and/or follow up to
identify whether the exceedances occurred related to other HZMB contracts.
Implementation of Mitigation Measures
Site inspections were carried out on a weekly
basis to monitor the implementation of proper environmental pollution control
and mitigation measures for the Project.
Potential environmental impacts due to the construction activities were
monitored and reviewed.
Complaint Log
There were five complaints received in relation
to the environmental impacts during the reporting period.
A summary of environmental complaints for this
reporting periods as follows:
Environmental Complaint No. |
Date of Complaint Received |
Description of Environmental Complaints |
COM-2016-099 |
2 December 2016 |
Slurry on public road |
COM-2016-100 |
14 December 2016 |
Mud/debris on public road |
COM-2016-103 (See
Remark 1) |
14 December 2016 |
Noise |
COM-2017-104 (See
Remark 2) |
9 January 2017 |
Cleanliness problem at East Coast Road and Tung Fai Road |
COM-2017-108 |
23 February 2017 and 2 March 2017 |
Cleanliness problem at East Coast Road |
Remarks:
1.Based on updated information received in February 2017, the
environmental complaint no. COM-2016-104 mentioned in Monthly EM&A Report
for December 2016 and January 2017 should be COM-2016-103.
2. Based on updated information received in February 2017, the
environmental complaint no. COM-2016-105 mentioned in Monthly EM&A Report
for January 2017 should be COM-2016-104.
Notifications of Summons and Prosecutions
There were no notifications of summons or
prosecutions received during this reporting period.
Reporting Changes
This report has been developed in compliance
with the reporting requirements for the quarterly summary EM&A reports as
required by the Updated EM&A Manual for HKLR (Version 1.0).
The proposal for the change of Action Level and
Limit Level for suspended solid and turbidity was approved by EPD on 25 March
2013.
The revised Event and Action Plan for dolphin monitoring was approved by EPD on 6 May 2013.
The original monitoring station at IS(Mf)9
(Coordinate- East:813273, North 818850) was observed inside the perimeter silt
curtain of Contract HY/2010/02 on 1 July 2013, as such the original impact
water quality monitoring location at IS(Mf)9 was temporarily shifted outside
the silt curtain. As advised by the
Contractor of HY/2010/02 in August 2013, the perimeter silt curtain was shifted
to facilitate safe anchorage zone of construction barges/vessels until end of
2013 subject to construction progress.
Therefore, water quality monitoring station IS(Mf)9 was shifted to 813226E
and 818708N since 1 July 2013.
According to the water quality monitoring team¡¦s observation on 24 March
2014, the original monitoring location of IS(Mf)9 was no longer enclosed by the
perimeter silt curtain of Contract HY/2010/02. Thus, the impact water quality
monitoring works at the original monitoring location of IS(Mf)9 has been
resumed since 24 March 2014.
Transect lines 1, 2, 7, 8, 9 and 11 for dolphin
monitoring have been revised due to the obstruction of the permanent structures
associated with the construction works of HKLR and the southern viaduct of
TM-CLKL, as well as provision of adequate buffer distance from the Airport
Restricted Areas. The EPD issued a
memo and confirmed that they had no objection on the revised transect lines on
19 August 2015.
The water quality monitoring locations at IS10
(Coordinate: 812577E, 820670N) and SR5 (811489E, 820455N) are located inside
Hong Kong International Airport (HKIA) Approach Restricted Areas. The
previously granted Vessel's Entry Permit for accessing stations IS10 and SR5
was expired on 31 December 2016. Renewal of the permit was applied in mid of
December 2016. As the application was still under Civil Aviation Department¡¦s
review on 2 January 2017 to determine whether the proposed water quality
monitoring at locations IS10 and SR5 would affect airport¡¦s operation and their
permission is one of consideration for Marine Department to issue the Permit.
Therefore, accessing monitoring locations at IS10 and SR5 was temporarily
prohibited on 2, 4 and 6 January 2017. During the permit renewing
process, the water quality monitoring location was shifted to IS10(N)
(Coordinate: 813060E, 820540N) and SR5(N) (Coordinate: 811430E, 820978N) on 2,
4 and 6 January 2017 temporarily. IS10(N) and SR5(N) were located outside the
restricted area but close to the original monitoring location. So, the
monitoring results obtained at IS10(N) and SR5(N) are still representative and
the baseline monitoring results are still applicable. The permit has been
granted by Marine Department on 6 January 2017. Thus, the impact water quality
monitoring works at original monitoring locations at IS10 and SR5 has been
resumed since 9 January 2017.
Table 1.1 Construction
Activities during Reporting Period
Description of Activities |
Site Area |
Stockpiling |
WA7 |
Dismantling/Trimming of
Temporary 40mm Stone Platform for Construction of Seawall |
Portion X |
Construction of Seawall |
Portion X |
Pipe Piling |
Portion X |
Loading and Unloading of
Filling Materials |
Portion X |
Backfilling at Scenic Hill
Tunnel (Cut & Cover Tunnel) |
Portion X |
Construction of Tunnel Box
Structure at Scenic Hill Tunnel (Cut & Cover Tunnel) |
Portion X |
Excavation for HKBCF to
Airport Tunnel & construction of tunnel box structure |
Portion X |
Excavation for Diversion of
culvert PR9 and PR14 |
Portion X |
Works for Diversion of Airport
Road |
Airport Road |
Utilities Detection |
Airport Road / Airport Express Line / East Coast Road |
Establishment of Site Access |
Airport Road / Airport Express Line/ East Coast Road |
Mined Tunnel Excavation / Box
Jacking underneath Airport Road and Airport Express Line |
Airport Road / Airport Express Line |
Excavation and lateral support
works at shaft 3 extension north shaft (Package T1.12.1) |
Near Kwo Lo Wan Road |
Construction of Tunnel box
structure (Package T1.12.1) |
Near Kwo Lo Wan Road |
Construction of Tunnel box
structure |
Shaft 3 Extension South Shaft |
Excavation and Lateral Support
Works & Construction of Tunnel Box Structure for HKBCF to Airport Tunnel
West (Cut & Cover Tunnel) |
Airport Road |
Excavation and Lateral Support
Works & Construction of Tunnel Box Structure for HKBCF to Airport Tunnel
West (Cut & Cover Tunnel) |
Portion X |
Sub-structure &
superstructure works for Highway Operation and Maintenance Area Building |
Portion X |
Superstructure works for
Scenic Hill Tunnel West Portal Ventilation Buildingilding |
West Portal |
Excavation for Scenic Hill
Tunnel |
West Portal |
Table 2.1 Summary
of Impact EM&A Requirements
Environmental
Monitoring |
Description |
Monitoring
Station |
Frequencies |
Remarks |
Air Quality |
1-hr TSP |
AMS 5 & AMS 6 |
At least 3 times every 6 days |
While the
highest dust impact was expected. |
24-hr TSP |
At least once every 6 days |
-- |
||
Noise |
Leq (30mins), |
NMS5 |
At least once per week |
Daytime on normal weekdays
(0700-1900 hrs). |
Water Quality |
¡P Depth ¡P Temperature ¡P Salinity ¡P Dissolved Oxygen
(DO) ¡P Suspended Solids
(SS) ¡P DO Saturation ¡P Turbidity ¡P pH |
¡P Impact Stations: ¡P Control/Far Field
Stations: ¡P Sensitive Receiver
Stations: |
Three times per week
during mid-ebb and mid-flood tides (within ¡Ó 1.75 hour of the predicted time) |
3 (1 m below water surface,
mid-depth and 1 m above sea bed, except where the water depth is less than 6
m, in which case the mid-depth station may be omitted. Should the water depth be less than 3
m, only the mid-depth station will be monitored). |
Dolphin
|
Line-transect Methods |
Northeast Lantau survey
area and Northwest Lantau survey area |
Twice per
month |
-- |
Mudflat |
Horseshoe crabs, seagrass beds, intertidal soft shore communities,
sedimentation rates and water quality |
San Tau and Tung Chung Bay |
Once every 3 months |
-- |
Table 2.2 Action
and Limit Levels for 1-hour TSP, 24-hour TSP and Noise
Environmental Monitoring |
Parameters |
Monitoring Station |
Action Level |
Limit Level |
Air
Quality |
1-hr TSP |
AMS
5 |
352 µg/m3 |
500 µg/m3 |
AMS
6 |
360 µg/m3 |
|||
24-hr TSP |
AMS
5 |
164 µg/m3 |
260 µg/m3 |
|
AMS
6 |
173 µg/m3 |
|||
Noise |
Leq
(30 min) |
NMS 5 |
When
one documented complaint is received |
75
dB(A) |
Table 2.3 Action
and Limit Levels for Water Quality
Parameter
(unit) |
Water Depth |
Action
Level |
Limit Level |
Dissolved Oxygen (mg/L) |
Surface and Middle |
5.0 |
4.2 except 5 for Fish Culture
Zone |
Bottom |
4.7 |
3.6 |
|
Turbidity (NTU) |
Depth average |
27.5 or 120% of upstream
control station¡¦s turbidity at the same tide of the same day; The action level has been
amended to ¡§27.5 and 120% of upstream control station¡¦s turbidity at the same
tide of the same day¡¨ since 25 March 2013. |
47.0 or 130% of turbidity
at the upstream control station at the same tide of same day; The limit level has been
amended to ¡§47.0 and 130% of turbidity at the upstream control station at the
same tide of same day¡¨ since 25 March 2013. |
Suspended Solid (SS)
(mg/L) |
Depth average |
23.5 or 120% of upstream
control station¡¦s SS at the same tide of the same day; The action level has been
amended to ¡§23.5 and 120% of upstream control station¡¦s SS at the same tide of
the same day¡¨ since 25 March 2013. |
34.4 or 130% of SS at the
upstream control station at the same tide of same day and 10mg/L for Water
Services Department Seawater Intakes; The limit level has been
amended to ¡§34.4 and 130% of SS at the upstream control station at the same
tide of same day and 10mg/L for Water Services Department Seawater Intakes¡¨
since 25 March 2013 |
(1) Depth-averaged is
calculated by taking the arithmetic means of reading of all three depths.
(2) For DO, non-compliance
of the water quality limit occurs when monitoring result is lower that the
limit.
(3) For SS & turbidity
non-compliance of the water quality limits occur when monitoring result is
higher than the limits.
(4) The change to the
Action and limit Levels for Water Quality Monitoring for the EM&A works was
approved by EPD on 25 March 2013. Therefore, the amended Action and Limit
Levels are applied for the water monitoring results obtained on and after 25
March 2013.
Table 2.4 Action
and Limit Level for Dolphin Impact Monitoring
|
North Lantau
Social Cluster |
|
NEL |
NWL |
|
Action Level |
STG < 70% of baseline
& |
STG < 70% of baseline
& |
Limit Level |
STG < 40% of baseline
& |
Remarks:
(1)
STG
means quarterly average encounter rate of number of dolphin sightings.
(2)
ANI
means quarterly average encounter rate of total number of dolphins.
(3)
For
North Lantau Social Cluster, AL will be triggered if either NEL or NWL fall
below the criteria; LL will be triggered if both NEL and NWL fall below the
criteria.
Table 2.5 Derived
Value of Action Level (AL) and Limit Level (LL)
|
North Lantau
Social Cluster |
|
NEL |
NWL |
|
Action Level |
STG < 4.2 & ANI < 15.5 |
STG < 6.9 & ANI
< 31.3 |
Limit Level |
(STG < 2.4 & ANI
< 8.9) and (STG < 3.9 & ANI < 17.9) |
Remarks:
(1)
STG
means quarterly average encounter rate of number of dolphin sightings.
(2)
ANI
means quarterly average encounter rate of total number of dolphins.
(3)
For
North Lantau Social Cluster, AL will be triggered if either NEL or NWL fall
below the criteria; LL will be triggered if both NEL and NWL fall below the
criteria.
Table 3.1 Summary
of 1-hour TSP Monitoring Results Obtained During the Reporting Period
Reporting Period |
Monitoring Station |
Average (mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
December 2016 |
AMS5 |
75 |
32 ¡V 168 |
352 |
500 |
AMS6 |
72 |
30 ¡V 136 |
360 |
||
January 2017 |
AMS5 |
101 |
19 ¡V 286 |
352 |
|
AMS6 |
91 |
38 ¡V 205 |
360 |
||
February 2017 |
AMS5 |
107 |
32 ¡V 191 |
352 |
|
AMS6 |
138 |
54 ¡V 329 |
360 |
Table 3.2 Summary
of 24-hour TSP Monitoring Results Obtained During the Reporting Period
Reporting Period |
Monitoring Station |
Average (mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
December 2016 |
AMS5 |
117 |
52 ¡V 148 |
164 |
260 |
AMS6 |
111 |
79 ¡V 167 |
173 |
||
January 2017 |
AMS5 |
65 |
45 ¡V 89 |
164 |
|
AMS6 |
74 |
45 ¡V 98 |
173 |
||
February 2017 |
AMS5 |
72 |
36 ¡V 98 |
164 |
|
AMS6 |
75 |
52 ¡V 104 |
173 |
Table 3.3 Summary of Construction Noise
Monitoring Results Obtained During the Reporting Period
Reporting period |
Monitoring Station |
Average Leq (30 mins),
dB(A)* |
Range of Leq (30
mins), dB(A)* |
Action Level |
Limit Level Leq (30
mins), dB(A) |
December 2016 |
NMS5 |
61 |
60 ¡V 61 |
When one documented complaint is received |
75 |
January 2017 |
59 |
58 ¡V 60 |
|||
February 2017 |
61 |
58 ¡V 63 |
SPSE = ((S / E) x
100) / SA%
DPSE = ((D / E) x
100) / SA%
where S =
total number of on-effort sightings
D = total number of
dolphins from on-effort sightings
E = total number of
units of survey effort
SA% = percentage of
sea area
Summary of Survey Effort and Dolphin Sightings
Table
3.4 Dolphin
Encounter Rates (Sightings Per 100 km of Survey Effort) During Reporting Period
(December 2016
¡V February 2017)
Survey Area |
Dolphin Monitoring |
Encounter rate (STG) |
Encounter rate (ANI) |
Primary Lines Only |
Primary Lines Only |
||
Northeast Lantau |
Set 1 (1 & 6 Dec 2016) |
0.00 |
0.00 |
Set 2 (16 & 19 Dec 2016) |
0.00 |
0.00 |
|
Set 3 (10 & 12 Jan 2017) |
0.00 |
0.00 |
|
Set 4 (16 & 20 Jan 2017) |
0.00 |
0.00 |
|
Set 5 (7 & 9 Feb 2017) |
0.00 |
0.00 |
|
Set 6 (16 & 21 Feb 2017) |
0.00 |
0.00 |
|
Northwest Lantau |
Set 1 (1 & 6 Dec 2016) |
1.58 |
1.58 |
Set 2 (16 & 19 Dec 2016) |
5.99 |
22.45 |
|
Set 3 (10 & 12 Jan 2017) |
0.00 |
0.00 |
|
Set 4 (16 & 20 Jan 2017) |
6.27 |
20.38 |
|
Set 5 (7 & 9 Feb 2017) |
0.00 |
0.00 |
|
Set 6 (16 & 21 Feb 2017) |
8.99 |
42.71 |
Table
3.5 Comparison of average dolphin encounter rates from impact
monitoring period (December
2016 ¡V February 2017)
and baseline monitoring period (September ¡V November 2011)
Survey Area |
Encounter rate (STG) |
Encounter rate (ANI) |
||
December 2016 ¡V February 2017 |
September ¡V November 2011 |
December 2016 ¡V February 2017 |
September ¡V November 2011 |
|
Northeast Lantau |
0.0 |
6.00 ¡Ó 5.05 |
0.0 |
22.19 ¡Ó 26.81 |
Northwest Lantau |
3.80 ¡Ó 3.79 |
9.85 ¡Ó 5.85 |
14.52 ¡Ó 17.21 |
44.66 ¡Ó 29.85 |
Notes:
1) The encounter rates deduced from the baseline monitoring period have been
recalculated based only on the survey effort and on-effort sighting data made
along the primary transect lines under favourable conditions.
2) ¡Ó denotes the standard deviation
of the average encounter rates.
Table
3.6 Comparison of Average
Dolphin Encounter Rates in Northeast Lantau Survey Area from All Quarters of
Impact Monitoring Period and Baseline Monitoring Period (Sep ¡V Nov 2011)
Monitoring Period |
Encounter rate (STG) |
Encounter rate (ANI) |
September-November 2011 (Baseline) |
6.00 ¡Ó 5.05 |
22.19 ¡Ó 26.81 |
December 2012-February 2013
(Impact) |
3.14 ¡Ó 3.21* |
6.33 ¡Ó 8.64* |
March-May 2013 (Impact) |
0.42 ¡Ó 1.03 |
0.42 ¡Ó 1.03 |
June-August 2013 (Impact) |
0.88 ¡Ó 1.36 |
3.91 ¡Ó 8.36 |
September-November 2013 (Impact) |
1.01 ¡Ó 1.59 |
3.77 ¡Ó 6.49 |
December 2013-February 2014
(Impact) |
0.45 ¡Ó 1.10* |
1.34 ¡Ó 3.29* |
March-May 2014 (Impact) |
0.00 |
0.00 |
June-August 2014 (Impact) |
0.42 ¡Ó 1.04 |
1.69 ¡Ó 4.15 |
September-November 2014 (Impact) |
0.00 |
0.00 |
December 2014-February 2015
(Impact) |
0.00* |
0.00* |
March-May 2015 (Impact) |
0.00 |
0.00 |
June-August 2015 (Impact) |
0.44 ¡Ó 1.08 |
0.44 ¡Ó 1.08 |
September-November 2015 (Impact) |
0.00 |
0.00 |
December 2015-February 2016
(Impact) |
0.00* |
0.00* |
March-May 2016 (Impact) |
0.00 |
0.00 |
June-August 2016 (Impact) |
0.00 |
0.00 |
September-November 2016 (Impact) |
0.00 |
0.00 |
December 2016-February 2017 (Impact) |
0.00* |
0.00* |
Notes:
1) The encounter rates deduced from the baseline monitoring period have been recalculated
based only on survey effort and on-effort sighting data made along the primary
transect lines under favourable conditions.
2) ¡Ó denotes the standard deviation of the average encounter rates.
3) The encounter rates in winter months were in blue and marked with asterisk.
Table 3.7 Comparison of Average Dolphin Encounter Rates in
Northwest Lantau Survey Area from All Quarters of Impact Monitoring Period and
Baseline Monitoring Period (Sep ¡V Nov 2011)
Monitoring Period |
Encounter rate (STG)
(no. of on-effort dolphin
sightings per 100 km of survey effort) |
Encounter rate (ANI)
(no. of dolphins from all on-effort
sightings per 100 km of survey effort) |
September-November 2011 (Baseline) |
9.85 ¡Ó 5.85 |
44.66 ¡Ó 29.85 |
December 2012-February 2013 (Impact) |
8.36 ¡Ó 5.03* |
35.90 ¡Ó 23.10* |
March-May 2013 (Impact) |
7.75 ¡Ó 3.96 |
24.23 ¡Ó 18.05 |
June-August 2013 (Impact) |
6.56 ¡Ó 3.68 |
27.00 ¡Ó 18.71 |
September-November 2013 (Impact) |
8.04 ¡Ó 1.10 |
32.48 ¡Ó 26.51 |
December 2013-February 2014 (Impact) |
8.21 ¡Ó 2.21* |
32.58 ¡Ó 11.21* |
March-May 2014 (Impact) |
6.51 ¡Ó 3.34 |
19.14 ¡Ó 7.19 |
June-August 2014 (Impact) |
4.74 ¡Ó 3.84 |
17.52 ¡Ó 15.12 |
September-November 2014 (Impact) |
5.10 ¡Ó 4.40 |
20.52 ¡Ó 15.10 |
December 2014-February 2015 (Impact) |
2.91 ¡Ó 2.69* |
11.27 ¡Ó 15.19* |
March-May 2015 (Impact) |
0.47 ¡Ó 0.73 |
2.36 ¡Ó 4.07 |
June-August 2015 (Impact) |
2.53 ¡Ó 3.20 |
9.21 ¡Ó 11.57 |
September-November 2015 (Impact) |
3.94 ¡Ó 1.57 |
21.05 ¡Ó 17.19 |
December 2015-February 2016 (Impact) |
2.64 ¡Ó 1.52* |
10.98 ¡Ó 3.81* |
March-May 2016 (Impact) |
0.98 ¡Ó 1.10 |
4.78 ¡Ó 6.85 |
June-August 2016 (Impact) |
1.72 ¡Ó 2.17 |
7.48 ¡Ó 10.98 |
September-November 2016 (Impact) |
2.86 ¡Ó 1.98 |
10.89 ¡Ó 10.98 |
December 2016-February 2017 (Impact) |
3.80 ¡Ó 3.79* |
14.52 ¡Ó 17.21* |
Notes:
1) The encounter rates deduced from the baseline monitoring period have
been recalculated based only on survey effort and on-effort sighting data made
along the primary transect lines under favourable conditions.
2) ¡Ó denotes the standard deviation of the average encounter rates.
3) The encounter rates in winter months were in blue and marked with asterisk.
Table
3.8 Comparison
of Average Dolphin Group Sizes between Reporting Period (Dec
2016 ¡V Feb 2017) and Baseline
Monitoring Period (Sep ¡V Nov 2011)
Survey Area |
Average Dolphin Group Size |
|
Reporting Period |
Baseline Monitoring Period |
|
Overall |
3.65 ¡Ó 2.37 (n = 17) |
3.72 ¡Ó 3.13 (n = 66) |
Northeast Lantau |
--- |
|
Northwest Lantau |
3.65 ¡Ó 2.37 (n = 17) |
3.92 ¡Ó 3.40 (n = 49) |
Note:
1) ¡Ó denotes the standard deviation of the
average group size.
Summary Photo-identification works
Table 3.9 Measured
Mudflat Surface Level Results
Baseline Monitoring |
Impact Monitoring |
|||||
Monitoring Station |
Easting |
Northing (m) |
Surface Level |
Easting |
Northing (m) |
Surface Level (mPD) |
S1 |
810291.160 |
816678.727 |
0.950 |
810291.174 |
816678.732 |
1.102 |
S2 |
810958.272 |
815831.531 |
0.864 |
810958.273 |
815831.508 |
0.961 |
S3 |
810716.585 |
815953.308 |
1.341 |
810716.583 |
815953.287 |
1.456 |
S4 |
811221.433 |
816151.381 |
0.931 |
811221.428 |
816151.395 |
1.058 |
Table 3.10 Comparison
of Measurement
Comparison of
measurement |
Remarks and Recommendation |
|||
Monitoring Station |
Easting |
Northing (m) |
Surface Level |
|
S1 |
0.0014 |
0.005 |
0.152 |
Level continuously increased |
S2 |
0.0001 |
-0.023 |
0.097 |
Level continuously increased |
S3 |
-0.002 |
-0.021 |
0.115 |
Level continuously increased |
S4 |
-0.005 |
0.014 |
0.127 |
Level continuously increased |
Table 3.11 Impact Water
Quality Monitoring Results (Depth Average)
Date |
Mid Ebb Tide |
Mid Flood Tide |
||||
DO (mg/L) |
Turbidity (NTU) |
SS (mg/L) |
DO (mg/L) |
Turbidity (NTU) |
SS (mg/L) |
|
2-Dec-16 |
7.19 |
6.55 |
4.95 |
6.90 |
7.20 |
11.60 |
5-Dec-16 |
7.14 |
7.10 |
7.50 |
6.80 |
7.05 |
9.00 |
7-Dec-16 |
6.90 |
7.35 |
16.50 |
7.30 |
10.15 |
19.50 |
9-Dec-16 |
6.98 |
4.35 |
8.85 |
7.22 |
5.20 |
7.45 |
12-Dec-16 |
7.27 |
3.80 |
5.15 |
7.51 |
7.15 |
8.00 |
14-Dec-16 |
7.69 |
2.55 |
7.15 |
7.65 |
2.20 |
14.30 |
16-Dec-16 |
8.30 |
3.10 |
7.45 |
7.81 |
3.60 |
8.40 |
19-Dec-16 |
7.74 |
4.30 |
7.15 |
8.04 |
4.40 |
6.75 |
21-Dec-16 |
7.53 |
6.85 |
9.85 |
7.64 |
6.90 |
8.25 |
23-Dec-16 |
7.56 |
3.70 |
5.10 |
7.88 |
5.15 |
4.20 |
26-Dec-16 |
7.96 |
3.45 |
4.75 |
8.37 |
3.20 |
5.90 |
28-Dec-16 |
8.55 |
3.85 |
7.50 |
8.51 |
5.20 |
7.90 |
30-Dec-16 |
8.68 |
4.35 |
10.50 |
8.53 |
6.10 |
11.00 |
Average |
7.65 |
4.72 |
7.88 |
7.70 |
5.65 |
9.40 |
Mudflat Ecology Monitoring
H¡¦= -£U ( Ni / N ) ln ( Ni / N ) (Shannon and Weaver,
1963)
J = H¡¦ / ln
S, (Pielou, 1966)
where S is the total number of species in the sample,
N is the total number of individuals, and Ni is the number of individuals of
the ith species.
Population difference among
the sampling zones