case study in nazaré on remote sensing: ground survey · case study in nazaré on remote sensing:...
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Case study in Nazaré on Remote Sensing: Ground survey
Luís Filipe Bonifácio, P.M. Naves & E.M. Sousa (Entomology)
M.L Inácio & A.M. Fontes (Nematology)
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PLURIFOR WORSHOP PWN – OEIRAS 2
Objectives
- Ground survey to detect symptomatic pines e collect wood samples for pine-wood nematode detection.
-TRAGSA provides an unmanned aerial vehicle or drone (UAV) with RGB, multispectral and thermal sensors onboard.
- Development of a tool to detect symptomatic trees minimizing work effort (less time consuming, human and financial cheaper) by remote sensing.
Procedures
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PLURIFOR WORSHOP PWN – OEIRAS 3
Criteria for site selection
- Within affected areas;
- Single flight zone with about 15 ha with trees showing different degrees of affection;
-Slope of the ground, the angle of incidence of sunlight and the angle of view of the sensor;
- Mono-specific stands with homogeneous characteristics in terms of age, height, forest structure and spatial distribution;
- Composition of the understory that allows to discriminate the pine canopy.
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PLURIFOR WORSHOP PWN – OEIRAS 4
- The area must have an open surface close for the UAV taking off / landing, and to set up the ground control station and the generator for charging the batteries;
- Easy to transport and set up of the equipment;
- Nearby weather stations (which provide auxiliary information);
- Requires flight permission from the Portuguese National Aerial Authority.
Other issues to consider:
- The UAV must fly at least 2.5 km away from any aerodrome or airport;
- The UAV cannot fly over inhabited areas or buildings;
- The UAV cannot fly over crowds (12 people is a crowd).
Criteria for site selection
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PLURIFOR WORSHOP PWN – OEIRAS 5
Site selection
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PLURIFOR WORSHOP PWN – OEIRAS 6
Matas Nacionais do
Pinhal de Leiria e do
Valado de Frades
Site selection
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Mata Nacional do Valado de Frades
PLURIFOR WORSHOP PWN – OEIRAS 7
Site selection
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Mata Nacional do Valado de Frades
Parcel Size (ha)
Age (yrs)
Dead pines
8a 17,5 57 2
8a’ 5,5 57 7
9a 17,9 63 3
20a’ 23,0 62 3
T 63,9 - 15
Ground survey
29th May 2017
PLURIFOR WORSHOP PWN – OEIRAS 8
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Mata Nacional do Valado de Frades
Ground survey
29th May 2017
PLURIFOR WORSHOP PWN – OEIRAS 9
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Dead pines
PLURIFOR WORSHOP PWN – OEIRAS 10
6 8 10
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Dead pines
PLURIFOR WORSHOP PWN – OEIRAS 11
13 14
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Mata Nacional do Valado de Frades Ground survey (29th May 2017)
PLURIFOR WORSHOP PWN – OEIRAS 12
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Preparation of wood
samples for
nematode extraction
PLURIFOR WORSHOP PWN – OEIRAS 13
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Identification
and counting
of nematodes
PLURIFOR WORSHOP PWN – OEIRAS 14
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Survey of PWN in dead trees
PLURIFOR WORSHOP PWN – OEIRAS 15
Parcel Size (ha)
Age (yrs)
Dead pines
Mortality incidence
PWN infected
Symptom classes
8a 17,5 57 2 0,1 trees/ha
2 (4, 4)
8a’ 5,5 57 7 1,3 3 (3, 3, 4)
9a 17,9 63 3 0,2 1 (4)
20a’ 23,0 62 3 0,1 2 (4)
T 63,9 - 15 8 (53%)
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Mata Nacional do Valado de Frades
Ground survey
29th May 2017
PLURIFOR WORSHOP PWN – OEIRAS 16
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PLURIFOR WORSHOP PWN – OEIRAS 17
Sunday , 15th October 2017
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PLURIFOR WORSHOP PWN – OEIRAS 18
Sunday , 15th October 2017
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PLURIFOR WORSHOP PWN – OEIRAS 19
Sunday , 15th October 2017
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PLURIFOR WORSHOP PWN – OEIRAS 20
Sunday , 15th October 2017
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Mata Nacional do Valado de Frades – Ground Survey 7th Nov. 2017
PLURIFOR WORSHOP PWN – OEIRAS 21
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arv5
arv10 arv11
arv14
arv19
arv20
PLURIFOR WORSHOP PWN – OEIRAS 22
Mata Nacional do Valado de Frades – Ground Survey 7th Nov. 2017
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PLURIFOR WORSHOP PWN – OEIRAS 23
Mata Nacional do Valado de Frades – Ground Survey 7th Nov. 2017
3 4
24
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PLURIFOR WORSHOP PWN – OEIRAS 24
Mata Nacional do Valado de Frades – Ground Survey 7th Nov. 2017
25
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arv5
arv10 arv11
arv14
arv19
arv20
PLURIFOR WORSHOP PWN – OEIRAS 25
Mata Nacional do Valado de Frades – Ground Survey 7th Nov. 2017
Parcel Size (ha)
Age (yrs)
Dead pines
Mortality incidence
PWN infected
8a’ 5,5 57 25 4,5 pines/ha 22 (88%)
Only 3 PWN-free 1 of each class
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