5.
ECOLOGY MONITORING
5.1
Monitoring Locations
5.1.1
The
ecological monitoring works for the Contract are covered by Contract No. HY/2013/04
¡§Hong Kong-Zhuhai-Macao-Bridge HKBCF ¡V Infrastructure Works Stage II (Southern
Portion)¡¨. The ET of the Contract or another ET of the HZMB project is required
to conduct dolphin monitoring at 24 transects as part of EM&A programme if
these transects are no longer covered under Contract No. HY/2013/04. The ecological monitoring should adopt
line-transect vessel survey method.
The survey follows pre-set and fixed transect lines in the two areas
defined by AFCD as: Northeast Lantau survey area; and Northwest Lantau survey
area. Figure 4 shows the co-ordinates
for the transect lines and layout map.
Remarks:
The ET of this Contract
should conduct impact ecological monitoring as part of EM&A programme
according to latest notification from ENPO when the monitoring transect(s)
is/are no longer covered by another ET of the HZMB project.
5.2
Monitoring Requirements
5.2.1
The
monitoring requirements, monitoring equipment, monitoring parameters, frequency
and duration, monitoring methodology, monitoring schedule, meteorological
information are detailed in the monthly EM&A Reports prepared by Contract
No. HY/2013/04.
5.2.2
The
event and action plan is provided in Appendix
C.
5.2.3
The
Action and Limit Levels for Chinese White Dolphin Monitoring are provided in Table 5.1(a) & Table 5.1(b).
Table
5.1(a) Action and Limit
Levels for Chinese White Dolphin Monitoring - Approach
to Define Action Level (AL) and Limit Level (LL)
|
North
Lantau Social Cluster |
|
NEL |
NWL |
|
Action Level |
(STG < 70%
of baseline) & (ANI < 70%
of baseline) |
(STG < 70%
of baseline) & (ANI < 70%
of baseline) |
Limit Level |
[(STG <
40% of baseline) & (ANI < 40% of baseline)] AND [ (STG <
40% of baseline) & (ANI < 40% of baseline)] |
For North Lantau Social
Cluster, action level will be trigger if either NEL or NWL fall below the
criteria; limit level will be triggered if both NEL and NWL fall below the
criteria.
Table
5.2(b) Derived Value of
Action Level (AL) and Limit Level (LL) for Chinese White
Dolphin Monitoring
|
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)] |
5.2.4
If
exceedance(s) at these transects is/are recorded by the ET of the Contract or
referred by the other ET under the HZMB project to the Contract, the ET of the
Contract will carry out an investigation and findings will be reported in the
monthly EM&A Report.
5.3
Monitoring Result
5.3.1
The
dolphin survey results for all transects are reported in the monthly EM&A
Reports prepared by Contract No. HY/2013/04.