Question On Notice No. 3333 asked in the Legislative Council on 20 October 2020 by Hon Alison Xamon
Question Directed to the: Minister for Agriculture and Food
Parliament: 40 Session: 1
Question
I
refer to Department of Water and Environmental Regulation (DWER) analyses of remote sensing images that identify vegetation
changes (as per the answer to part 10 of question on notice 469 answered on 6
December 2017), and I ask:
(a) can
these analyses be used to estimate vegetation coverage on the Swan Coastal
Plain;
(b) if
yes to (a), could the Minister please provide estimates of vegetation coverage on
the Swan Coastal Plain as a snapshot at five-year intervals from 1990;
(c) can
these analyses be used to estimate native vegetation coverage (solely) on the
Swan Coastal Plain; and
(d) if yes to (d), could the Minister please provide
estimates of native vegetation coverage on the Swan Coastal Plain as a snapshot
at five-year intervals from 1990?
Answered on 24 November 2020
a. Yes.
b. The below table shows vegetation cover of the Swan Coastal Plain (SCP) estimated using remote sensing imagery. The column “Satellite coverage of the SCP (%)” shows the percentage of the region with valid satellite data to estimate vegetation cover.
- Year
|
Vegetation Cover (%)
|
Satellite Coverage of the SCP (%)
|
1990
|
78*
|
88
|
1995
|
75*
|
66
|
2000
|
80
|
96
|
2005
|
77
|
97
|
2010
|
75
|
97
|
2015
|
78
|
97
|
2020
|
76
|
97
|
*less than 90% of the SCP was included in this estimate
c. No.
d. Not applicable.