Simulação MAPSAR em Estudos de Sensibilidade

Simulação MAPSAR em Estudos de Sensibilidade

Simulação MAPSAR em Estudos de
Sensibilidade Ambiental a Derrames de Óleo
na Amazônia
Fernando Pellon de Miranda
(PETROBRAS/CENPES)
(PETROBRAS/CENPES)
Carlos Henrique Beisl
(CBRR/COPPE/UFRJ)
(CBRR/COPPE/UFRJ)
Pedro Walfir M. Souza Filho
(UFPA/CG/LAIT)
(UFPA/CG/LAIT)
APRIL/2007
APRIL/2007 –– FLORIANÓPOLIS,
FLORIANÓPOLIS, SC
SC
STUDY AREA
JERS-1 SAR MOSAIC
1200
1000
800
Water Level (cm)
Water Level at Coari Gauge
from July 1982 to December 1998
DAILY WATER LEVEL AT COARI
2000
1800
1600
1400
600
400
200
0
jul/98
jan/98
jul/97
jan/97
jul/96
jan/96
jul/95
jan/95
jul/94
jan/94
jul/93
jan/93
jul/92
jan/92
jul/91
jan/91
jul/90
jul/82
jan/83
jul/83
jan/84
jul/84
jan/85
jul/85
jan/86
jul/86
jan/87
jul/87
jan/88
jul/88
jan/89
jul/89
jan/90
Time
Oil Spill Environmental Sensitivity Index
(ESI) for Fluvial Regions of Amazonia*
ESI RANKING
HABITATS
1
Manmade structures
2
Exposed rocky platform or outcrop
3
Rapid / waterfall
4
Scarp / cliff
5
Exposed sand / gravel beach or bank
6
Sheltered sand / gravel beach or bank
7
Exposed mud beach or bank
8
Sheltered mud beach or bank
9
Confluence of rivers and lakes
10a
Aquatic vegetation bank (macrophytes)
10b
Flooded vegetation (igapós, várzea, chavascal, campo)
*based on field surveys and previous studies
ACQUISITION PLAN OF R99SAR DATA OVER
COARI REGION
- DATE ACQUISITION:
- 01/June/2006
(High flood season)
- 16 DESCENDING STRIPS
- BAND ACQUISITIONS
- L Band - Quad-pol
- X band – Single-pol
- INCIDENCE ANGLE
(for each strip)
- 39.57º (near range)
- 70.99º (far range)
- SWATH WIDTH: 20 km
- GROUND RESOLUTION:
6 m.
R99SAR
L-band
Mosaic
Over
SRTM
Data
R99SAR L-band MOSAIC MAPSAR
-Multi-polarized images
used: R(HH) G(HV) B(VV)
- Acquisition date:
01 JUNE 2005
(high flood)
- Incidence angle used
interval of each strip:
- 39.57o Near range
- 45.00o Far Range
- This corresponds to an
average of 4 km of each
strip used to compose
the mosaic;
- Resolution resampled to
10 meters;
R99SAR L-band MOSAIC MAPSAR
HH+HV USTC
% PIXELS
FLOODED
VEGETATION
WATER
CLASS (HH+HV)
WATER
UPLAND
FOREST
FLOODED
FOREST
100
0
0
0
FLOODED VEGETATION
0
98.3
1.7
0
UPLAND FOREST
0
0
100
0
FLOODED FOREST
0
0
0
100
TESOL
Amplitude data
LHH(R), LHV (G), LVV(B)
LHV
LHH
LVV
COARI
LHH
LHV
LVV
COARI
Amplitude data
LHH(R), LHV (G), LVV(B)
Flooded Vegetation
Flooded Forest
Urban Areas
Clear-cut Areas
Upland Forest
Contrast-streched LVV: oil spill detection in Coari Lake
Bragança coastal wetland map
Souza Filho and Paradella, 2002
Mapa de sensibilidade ambiental ao derramamento de
óleo
10
Time (min)
2240
2110
1940
24 May 2005
1810
1640
1510
00:00
02:00
04:00
06:00
08:00
10:00
12:00
14:00
16:00
18:00
20:00
22:00
00:00
02:00
04:00
06:00
08:00
10:00
12:00
14:00
16:00
18:00
20:00
22:00
00:00
02:00
04:00
06:00
08:00
10:00
12:00
14:00
16:00
18:00
20:00
22:00
0
1340
1210
1040
910
23 May 2005
740
610
440
310
140
Elevation (cm)
Tidal range (m)
Remotely Sensed Area
Tide estuarine condition
during SAR acquisition data
6
5
4
3
2
1
-1
SAR imagery time
Day/Hour
25 May 2005
Tide mangrove condition
during SAR acquisition data
19 May 2003
140,00
120,00
100,00
80,00
60,00
40,00
20,00
0,00
-20,00
A) Taperaçu intertidal sandflat
R-HH, G-HV, BVV
View
Orbit
VV
HH
HV
*Shallow water bedform structures are well pronounced only in VV-pol.
*HV-pol. reveals the boundary between mangrove and tidal sandflat.
*HH-pol. reveals man-made structures to trap fishes over sandy bars.
*R-HH, G-VV, B-VV composite images reveals that VV-polarization is
capable of recognizing shallow water morphology (in blue color), while
man-made structure is perceptible in HH-pol.
C) Intertidal Mangrove areas
R-HH
G-HV
B-VV
VV
HH
HV
*In the regenerating mangrove area, HH-polarization
RM
DM
IHM
presents the best contrast between all mangrove
stages. Double-bounce scattering between trunks
and ground is present for the younger trees.
*Deforested
mangrove composite
areas present
a lowreveals
radar return
in strong
all three-polarizations,
due to
The multi-polarized
image
some
contrast between
specular reflection
of L-band
mudflat.
different
mangrove
stage -over
healthy
mangrove forest, regenerating mangrove
and
area.
*Thedeforested
absence of double-bounce
over mature forest must be, principally related with tide
condition during image acquisition (low spring tide), and high incidence angle.
L-HH
L-VV