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. 22 (December 2017 to February 2018)
21 June 2018
Revision 1
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
Appendix N Cumulative
Statistics on Complaints
Appendix O Mudflat
Monitoring Results
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 twenty-second 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 November 2017 to 28 February 2018.
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 2017 |
January
2018 |
February 2018 |
||
Air
Quality |
1-hr TSP |
4, 8, 14, 20, 22, 28 and 29 |
4, 10, 16, 22 and 26 |
1, 7, 13, 14, 20 and 26 |
24-hr TSP |
1, 7, 13, 19, 23 and 29 for AMS5 1, 7, 13, 19 and 23 for AMS6 |
3, 9, 15, 19, 25 and 31 for AMS5 4, 9, 15, 19, 25 and 31 for AMS6 |
6, 12, 15, 20 and 23 |
|
Noise |
4, 14, 20 and 28 |
4, 10, 16 and 22 |
6, 16, 22 and 28 |
|
Water Quality |
1, 4, 6, 8, 11, 13, 15, 18, 20, 22, 25, 27
and 29 |
1, 3, 5, 8, 10, 12, 15, 17, 19, 22, 24, 26,
29 and 31 |
2, 5, 7, 9, 12, 14, 17, 19, 21, 23, 26 and
28 |
|
Chinese
White Dolphin |
5, 12, 15 and 20 |
2, 8, 16 and 25 |
2, 9, 14 and 22 |
|
Mudflat Monitoring (Ecology) |
9, 10, 16, 17, 21 and 22 |
-- |
-- |
|
Mudflat Monitoring (Sedimentation rate) |
7 |
-- |
-- |
|
Site Inspection |
6, 4, 20 and 30 |
3 ,10, 17 and 26 |
1,7, 14 and 23 |
Due to boat unavailability, the dolphin
monitoring was rescheduled from 22 December 2017 to 20 December 2017, and from
22 January 2018 to 25 January 2018.
The monitoring time for 24-hr TSP
monitoring on 29 December 2017 at AMS6 (Dragonair Building) was discovered less
than 24 hours due to power interruption. The 24-hr TSP monitoring result
obtained at AMS6 on 29 December 2017 was considered invalid. Due to power
failure and malfunction of HVS from 29 December 2017 to 3 January 2018, 24-hr
TSP monitoring could not be conducted at such period. Competent people were
arranged to check the power supply and repair HVS on 3 and 4 January 2018
respectively. 24-hr TSP monitoring at AMS6 has been resumed on 4 January 2018.
Due to suitable weather condition, the
mudflat monitoring was rescheduled from 23 December 2017 to 21 December 2017.
Due to power failure and malfunction of
HVS at AMS6 from 29 December 2017 to 3 January 2018, 24-hr TSP monitoring could
not be conducted at such period. Competent people were arranged to check the
power supply and repair HVS on 3 and 4 January 2018 respectively. 24-hr TSP
monitoring at AMS6 was resumed on 4 January 2018.
Water quality monitoring was not
conducted at station CS2(A) during mid ebb and mid flood tide on 8 January 2018
due to rough sea condition and safety concern. Substitute monitoring was not
conducted on 9 January 2018 at station CS2(A) due to rough sea condition and
safety concern.
Fishing activity was observed near station SR4(N)
on 2 February 2018. Due to blockage of access to the station SR4(N) by a
fishing net, the water quality monitoring at station SR4(N) was temporarily
conducted at coordinate: 814620E, 818016N during mid ebb tide on 2 February
2018.
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 |
5 |
0 |
24-hr TSP |
2 |
0 |
|
Noise |
Leq
(30 min) |
0 |
0 |
Water
Quality |
Suspended
solids level (SS) |
11 |
1 |
Turbidity
level |
0 |
0 |
|
Dissolved
oxygen level (DO) |
0 |
0 |
|
Dolphin
Monitoring |
Quarterly
Analysis (Dec 2017 to Feb 2018) |
2 |
0 |
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 two complaints received in relation to the environmental
impacts during the reporting period.
A summary of environmental complaints for this reporting period is as
follows:
Environmental Complaint No. |
Date of Complaint Received |
Description of Environmental Complaint |
COM-2017-129 |
ENPO¡¦s email to the
Supervising Officer¡¦s Representative and Contractor on 8 January 2018 that
HyD received a complaint lodged by a member of the public regarding
cleanliness problem at East Coast Road on 29 December 2017 |
Cleanliness problem
at East Coast Road |
COM-2018-132 |
HyD (SOR referred the email from HyD to Contractor and ET on 13
February 2018) and EPD (ENPO referred the email from EPD to SOR, SOR sent the
email to Contractor and ET on 14 February 2018) |
Complaint
about Dust, Water Quality, Construction Waste, Noise and Vibration for the
Contract |
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 subsequent 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: 813273E,
818850N) 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 stations 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 were expired on 31 December 2016.
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. The permit has been
granted by Marine Department on 6 January 2017. Thus, the impact water quality
monitoring works at original monitoring location of IS10 and SR5 has been
resumed since 9 January 2017.
Transect lines 2, 3, 4, 5, 6 and 7 for dolphin monitoring have been
revised and transect line 24 has been added due to the presence of a work zone
to the north of the airport platform with intense construction activities in
association with the construction of the third runway expansion for the Hong
Kong International Airport. The EPD issued a memo and confirmed that they had
no objection on the revised transect lines on 28 July 2017. The alternative
dolphin transect lines are adopted starting from August¡¦s dolphin monitoring.
A new water quality monitoring team has been employed for carrying out
water quality monitoring work for the Contract starting from 23 August 2017.
Due to marine work of the Expansion of Hong Kong International Airport into a
Three-Runway System (3RS Project), original locations of water quality
monitoring stations CS2, SR5 and IS10 are enclosed by works boundary of 3RS
Project. Alternative impact water quality monitoring stations, naming as
CS2(A), SR5(N) and IS10(N) was approved on 28 July 2017 and were adopted
starting from 23 August 2017 to replace the original locations of water quality
monitoring for the Contract.
The role and responsibilities as the ET Leader of the Contract was
temporarily taken up by Mr Willie Wong instead of Ms Claudine Lee from 25
September 2017 to 31 December 2017.
The topographical condition of the water monitoring stations SR3
(Coordinate: 810525E, 816456N), SR4 (Coordinate: 814760E, 817867N), SR10A
(Coordinate: 823741E, 823495N) and SR10B (Coordinate: 823686E, 823213N) cannot
be accessed safely for undertaking water quality monitoring. The water quality
monitoring has been temporarily conducted at alternative stations, namely
SR3(N) (Coordinate 810689E, 816591N), SR4(N) (Coordinate: 814705E, 817859N) and
SR10A(N) (Coordinate: 823644E, 823484N) since 1 September 2017. The water
quality monitoring at station SR10B was temporarily conducted at Coordinate:
823683E, 823187N on 1, 4, 6, 8 September 2017 and has been temporarily
fine-tuned to alternative station SR10B(N2) (Coordinate: 823689E, 823159N)
since 11 September 2017. Proposal for permanently relocating the aforementioned
stations was approved by EPD on 8 January 2018.
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 |
Loading and unloading of filling materials |
Portion X |
Backfilling at Scenic Hill Tunnel (Cut & Cover Tunnel) |
Portion X |
Excavation for HKBCF to Airport Tunnel &
construction of tunnel box structure |
Portion X |
Works for diversion |
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 lining / box jacking transition zone
rebar fixing underneath Airport Road and Airport Express Line |
Airport Road and Airport Express Line |
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 East (Cut & Cover Tunnel) |
Portion X |
E&M/ Backfilling/ Bitumen works for HKBCF to Airport Tunnel West
(Cut & Cover Tunnel) |
Airport Road |
E&M/ Backfilling/ Bitumen works for HKBCF to Airport Tunnel East
(Cut & Cover Tunnel) |
Portion X |
Superstructure and finishing works for Highway Operation and
Maintenance Area Building |
Portion X |
Finishing works for Highway Operation and Maintenance Area Building |
Portion X |
Finishing works for Scenic Hill Tunnel West Portal Ventilation
Building |
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), |
NMS 5 |
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 2017 |
AMS5 |
41 |
13 ¡V 95 |
352 |
500 |
AMS6 |
56 |
17 ¡V 100 |
360 |
||
January 2018 |
AMS5 |
108 |
16 ¡V 398 |
352 |
|
AMS6 |
117 |
15 ¡V 412 |
360 |
||
February 2018 |
AMS5 |
49 |
23 ¡V 79 |
352 |
|
AMS6 |
45 |
17 ¡V 76 |
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
2017 |
AMS5 |
88 |
43 ¡V 139 |
164 |
260 |
AMS6 |
172 |
89 ¡V 253 |
173 |
||
January
2018 |
AMS5 |
54 |
44 ¡V 67 |
164 |
|
AMS6 |
77 |
62 ¡V 100 |
173 |
||
February
2018 |
AMS5 |
66 |
36 ¡V 85 |
164 |
|
AMS6 |
94 |
44 ¡V 138 |
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
2017 |
NMS5 |
58 |
57 ¡V 59 |
When one documented complaint is received |
75 |
January
2018 |
58 |
57 ¡V 60 |
|||
February
2018 |
58 |
56 ¡V 59 |
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
2017 ¡V February 2018)
Survey Area |
Dolphin Monitoring |
Encounter rate (STG) |
Encounter rate (ANI) |
Primary Lines Only |
Primary Lines Only |
||
Northeast Lantau |
Set 1 (5 & 12 Dec 2017) |
0.00 |
0.00 |
Set 2 (15 & 20 Dec 2017) |
0.00 |
0.00 |
|
Set 3 (2 & 8 Jan 2018) |
0.00 |
0.00 |
|
Set 4 (16 & 25 Jan 2018) |
0.00 |
0.00 |
|
Set 5 (2 & 9 Feb 2018) |
0.00 |
0.00 |
|
Set 6 (14 & 22 Feb 2018) |
0.00 |
0.00 |
|
Northwest Lantau |
Set 1 (5 & 12 Dec 2017) |
1.66 |
8.32 |
Set 2 (15 & 20 Dec 2017) |
8.39 |
22.37 |
|
Set 3 (2 & 8 Jan 2018) |
5.68 |
45.42 |
|
Set 4 (16 & 25 Jan 2018) |
3.43 |
3.43 |
|
Set 5 (2 & 9 Feb 2018) |
4.38 |
6.56 |
|
Set 6 (14 & 22 Feb 2018) |
4.97 |
8.29 |
Survey Area |
Encounter rate (STG) |
Encounter rate (ANI) |
||
Reporting Period |
Baseline Monitoring Period |
Reporting Period |
Baseline Monitoring Period |
|
Northeast Lantau |
0.0 |
6.00 ¡Ó 5.05 |
0.0 |
22.19 ¡Ó 26.81 |
Northwest Lantau |
4.75 ¡Ó 2.26 |
9.85 ¡Ó 5.85 |
15.73 ¡Ó 15.94 |
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* |
March-May 2017 (Impact) |
0.00 |
0.00 |
June-August 2017 (Impact) |
0.00 |
0.00 |
September-November 2017 (Impact) |
0.00 |
0.00 |
December 2017-February 2018 (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* |
March-May 2017 (Impact) |
0.93 ¡Ó 1.03 |
5.25 ¡Ó 9.53 |
June-August 2017 (Impact) |
2.20 ¡Ó 2.88 |
6.58 ¡Ó 8.12 |
September-November 2017 (Impact) |
3.12 ¡Ó 1.91 |
10.35 ¡Ó 9.66 |
December 2017-February 2018 (Impact) |
4.75 ¡Ó 2.26* |
15.73 ¡Ó 15.94* |
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 2017¡V Feb 2018)
and Baseline Monitoring Period (Sep ¡V Nov 2011)
Survey Area |
Average Dolphin Group Size |
|
Reporting Period |
Baseline Monitoring Period |
|
Overall |
2.65 ¡Ó 2.50 (n = 17) |
3.72 ¡Ó 3.13 (n = 66) |
Northeast Lantau |
--- |
|
Northwest Lantau |
2.65 ¡Ó 2.50 (n = 17) |
3.92 ¡Ó 3.40 (n = 49) |
Note:
1) ¡Ó denotes the standard deviation of the average
group size.
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 |
810291.162 |
816678.744 |
1.117 |
S2 |
810958.272 |
815831.531 |
0.864 |
810958.253 |
815831.503 |
0.986 |
S3 |
810716.585 |
815953.308 |
1.341 |
810716.564 |
815953.329 |
1.479 |
S4 |
811221.433 |
816151.381 |
0.931 |
811221.435 |
816151.339 |
1.099 |
Table 3.10 Comparison
of Measurement
Comparison of measurement |
Remarks and Recommendation |
|||
Monitoring Station |
Easting |
Northing (m) |
Surface Level |
|
S1 |
0.002 |
0.017 |
0.167 |
Level continuously
increased |
S2 |
-0.019 |
-0.028 |
0.122 |
Level continuously increased |
S3 |
-0.021 |
0.021 |
0.138 |
Level continuously increased |
S4 |
0.002 |
-0.042 |
0.168 |
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) |
|
1-Dec-17 |
7.1 |
6.2 |
6.0 |
7.1 |
6.2 |
6.0 |
4-Dec-17 |
7.1 |
6.2 |
7.6 |
7.0 |
7.9 |
13.7 |
6-Dec-17 |
7.2 |
10.4 |
11.2 |
7.2 |
9.8 |
10.9 |
8-Dec-17 |
7.2 |
8.6 |
13.4 |
7.0 |
10.8 |
12.3 |
11-Dec-17 |
7.6 |
6.5 |
13.0 |
7.4 |
8.2 |
13.2 |
13-Dec-17 |
7.3 |
4.3 |
6.5 |
7.4 |
6.5 |
11.8 |
15-Dec-17 |
7.1 |
6.1 |
6.8 |
7.4 |
5.3 |
6.5 |
18-Dec-17 |
7.4 |
5.0 |
6.9 |
7.3 |
5.9 |
5.6 |
20-Dec-17 |
7.9 |
|