2.
Response
to
Comments
2.9
Individual
Responses
to
Comments
from
Organizations
These
data
allow
each
wind
sailor
to
determine
the
percentage
change
in
wind
speed
and
the
change
in
turbulence
that
would
occur
at
specific
locations
or
regions
across
the
surface
of
the
test
grid
due
to
the
construction
of
the
Specific
Plan
or
the
variants.
Each
windsurfer
can
then
judge,
based
on
his
or
her
experience,
whether
the
wind
speed
change
would
substantially
adversely
affect
their
windsailing
experience.
See
also
33.
Discussion
regarding
gusts
and
lull
wind
speeds
is
provided
The
wind
test
measurements,
which
are
well
suited
to
determining
wind
turbulence,
show
expected
turbulence
changes
with
all
of
the
relevant
upwind
obstructions
present
in
the
model.
The
wind
turbulence
that
now
occurs
in
the
sailing
area
is
“natural,”
and
consist
of
two
components
–
the
first
component
is
the
turbulence
that
it
is
inherent
in
the
atmospheric
boundary
layer
when
it
reaches
the
site
(as
evidenced
by
wind
data
recorded
at
59
m
height
on
the
Baylands
site
meteorological
tower)
and
the
second
component
is
the
turbulence
that
is
contributed
by
surface
roughness
as
the
wind
passes
over
the
site.
In
terms
of
scale,
the
boundary
layer
winds
at
59
m
height
had
TI
values
that
ranged
from
0.17
for
West
winds,
0.14
for
WNW
winds,
and
0.20
for
NW
winds,
while
the
wind
tunnel
values
for
the
existing
surface
roughness
TI
values
range
from
0.20
near
shore
to
0.10
offshore
for
west
wind
(Figure
28
of
Draft
EIR
Appendix
J.1)
and
0.28
near
shore
to
0.11
offshore
for
northwest
wind
(Figure
22
of
Appendix
J.1).
These
independent
measurement
values
are
quite
consistent
with
each
other
and
therefore
add
to
the
confidence
that
the
wind
tunnel
simulation
matches
the
boundary
layer
at
the
site.
Further,
see
for
discussion
of
the
structure
of
the
boundary
layer.
As
indicated
in
that
response,
as
it
passes
over
the
site,
the
boundary
layer
gradually
adjusts
its
structure
in
response
to
the
actual
surface
roughness
of
the
surface
over
which
it
is
passing.
Therefore,
when
the
wind
reaches
into
the
Bay,
the
lesser
surface
roughness
of
the
water
will
enable
the
wind
to
recover
speed
and
to
decrease
TI,
which
can
be
seen
in
Figures
22
and
28
of
Draft
EIR
Appendix
J.1.
For
Project
Site
development,
the
wind
tunnel
values
for
the
Project
TI
range
from
0.20
near
shore
to
0.10
offshore
for
west
wind
(Figure
29
of
Draft
EIR
Appendix
J.1),
with
the
major
difference
between
existing
and
Project
Site
development
being
TI
increases
of
as
much
as
0.03
at
the
near
shore
and
along
a
500
foot
wide
band
across
the
south
central
part
of
the
grid.
The
wind
tunnel
values
for
Project
TI
range
from
0.28
near
shore
to
0.11
offshore
for
northwest
wind
(Figure
23
of
Appendix
J.1),
with
the
major
difference
being
that
Project
Brisbane
Baylands
Final
EIR
2.9.4-17
May
2015