VEGETATION DATA Viviana Maggioni Dr. Jeffrey Walker.

VEGETATION DATA

Viviana

Maggioni

Dr. Jeffrey Walker

2nd NAFE Workshop

The Vegetation Sampling

• Regional Sampling 16 vegetation biomass samples at

the 8 HI-RES areas (week 1 & 3)

6 vegetation biomass samples per farm every Monday at the same location

measurements of NDVI, TIR, LAI at 16 points of the HI-RES areas (once per farm)

• Farm Scale Sampling 2 vegetation “grab” samples

at NW and SE corners of the HI-RES area

N

S

W E

Viviana Maggioni

2nd NAFE Workshop

Collected Data

• Vegetation Dry Biomass

• Vegetation Water Content

• Normalized Difference Vegetation Index (NDVI)

• Thermal Infra Red (TIR)

• Leaf Area Index (LAI)

Viviana Maggioni

2nd NAFE Workshop

Objective• VWC estimates to remotely sense VWC• Literature: T. Jackson et al. (2003)• How accurate do we need to know VWC for a

given accuracy of Moisture Content of 4%?

Viviana Maggioni

• extreme conditions: 0.8 kg/m²

• otherwise: 1 kg/m²

Saturation of the NDVI

NIR – SWIRNDWI

= NIR + SWIR

_____

Pembroke:• 80% Barley• 20% Native Grass

Stanley:• Native Grass

Illogan:• 60% Oats• 40% Barley

Roscommon:• Native Grass

Dales:• Native Grass

Midlothian:• 50% Fallow• 50% Lucerne

Cullingral:• 50% Wheat• 50% Barley

Merriwa Park:• Wheat

The High Resolution Focus Areas

N

2nd NAFE Workshop

Dry Biomass (kg/m²): Merriwa Area

0

0.5

1

1.5

4-NOV 7-NOV 14-NOV 21-NOV

CULLINGRALD

ry B

iom

ass

(kg

/m^2

)

0

0.5

1

1.5

2

2.5

3

31-OCT 7-NOV 14-NOV 21-NOV

DALES

Dry

Bio

mas

s (k

g/m

^2)

0.4

0.6

0.8

1

1.2

1.4

1.6

7-NOV 14-NOV 21-NOV

MERRIWA_PARK

Dry

Bio

mas

s (k

g/m

^2)

0

0.2

0.4

0.6

0.8

1

1.2

1.4


MIDLOTHIAN

Dry

Bio

mas

s (k

g/m

^2)

Viviana Maggioni

2nd NAFE Workshop

0

0.5

1

1.5

31-OCT 14-NOV 21-NOV

ILLOGAND

ry B

iom

ass

(kg

/m^2

)

0

0.2

0.4

0.6

0.8

1

1.2

1.4


PEMBROKE

Dry

Bio

mas

s (k

g/m

^2)

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9


ROSCOMMON

Dry

Bio

mas

s (k

g/m

^2)

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

3-NOV 7-NOV 14-NOV 21-NOV

STANLEY

Dry

Bio

mas

s (k

g/m

^2)

Dry Biomass (kg/m²): Krui Area

Viviana Maggioni

2nd NAFE Workshop

Vegetation Water Content (kg/m²): Merriwa Area

0

0.5

1

1.5

2

31-OCT 4-NOV 7-NOV 14-NOV 9-NOV 18-NOV 21-NOV 25-NOV

CULLINGRALV

WC

(kg

/m^2

)

0

0.2

0.4

0.6

0.8

1

1.2

31-OCT 7-NOV 14-NOV 18-NOV 21-NOV 25-NOV

DALES

VW

C (

kg/m

^2)

0

0.5

1

1.5

2

2.5

3

7-NOV 9-NOV 14-NOV 16-NOV 21-NOV 23-NOV

MERRIWA_PARK

VW

C (

kg/m

^2)

0

0.5

1

1.5

2

2.5

31-OCT 7-NOV 11-NOV 14-NOV 21-NOV 23-NOV

MIDLOTHIAN

VW

C (

kg/m

^2)

Viviana Maggioni

2nd NAFE Workshop

Vegetation Water Content (kg/m²): Krui Area

0

0.5

1

1.5

2

2.5

3

3.5

31-OCT 14-NOV 17-NOV 21-NOV 24-NOV

ILLOGANV

WC

(kg

/m^2

)

0

1

2

3

4

5

6

31-OCT 7-NOV 8-NOV 14-NOV 15-NOV 21-NOV 22-NOV

PEMBROKE

VW

C (

kg/m

^2)

0

0.5

1

1.5

2

2.5

31-OCT 7-OCT 8-NOV 14-NOV 15-NOV 21-NOV 22-NOV 24-NOV

ROSCOMMON

VW

C (

kg/m

^2)

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

3-NOV 7-NOV 10-NOV 17-NOV 14-NOV 21-NOV 24-NOV

STANLEY

VW

C (

kg/m

^2)

Viviana Maggioni

2nd NAFE Workshop

NIR and RED

0

0.5

1

1.5

2

2.5

3

CU

LL

ING

RA

L

DA

LE

S

ME

RR

IWA

PA

RK

MID

LO

TH

IAN

ILL

OG

AN

PE

MB

RO

KE

RO

SC

OM

MO

N

ST

AN

LE

YNIR

NIR

0

0.2

0.4

0.6

0.8

1

1.2

CU

LL

ING

RA

L

DA

LE

S

ME

RR

IWA

PA

RK

MID

LO

TH

IAN

ILL

OG

AN

PE

MB

RO

KE

RO

SC

OM

MO

N

ST

AN

LE

Y

RED

RE

D

Viviana Maggioni

2nd NAFE Workshop

Normalized Difference Vegetation Index

0

0.2

0.4

0.6

0.8

1

CU

LL

ING

RA

L

MID

LO

TH

IAN

ME

RR

IWA

PA

RK

DA

LE

S

PE

MB

RO

KE

RO

SC

OM

MO

N

ST

AN

LE

Y

ILL

OG

AN

NDVI

ND

VI

NDVI =

NIR - RED

NIR + RED

Viviana Maggioni

2nd NAFE Workshop

0

0.5

1

1.5

2

2.5

3

3.5

4

CU

LL

ING

RA

L

DA

LE

S

ME

RR

IWA

PA

RK

MID

LO

TH

IAN

PE

MB

RO

KE

ST

AN

LE

Y

RO

SC

OM

MO

N

ILL

OG

AN

LAI

LA

I

20

25

30

35

40

45

50

55

60

CU

LL

ING

RA

L

DA

LE

S

ME

RR

IWA

PA

RK

ILL

OG

AN

PE

MB

RO

KE

RO

SC

OM

MO

N

ST

AN

LE

Y

TIR

TIR

TIR and LAI

Viviana Maggioni

2nd NAFE Workshop

MODIS NDVI Validation

0

0.2

0.4

0.6

0.8

1

0 0.2 0.4 0.6 0.8 1

GROUND_SATELLITE NDVI

PEMBROKE

STANLEY

ROSCOMMON

ILLOGAN

DALES

MIDLOTHIAN

MERRIWA PARK

CULLINGRAL

GR

OU

ND

ND

VI

MODIS NDVI

Viviana Maggioni

2nd NAFE Workshop

0

0.2

0.4

0.6

0.8

1

1.2

1.4

30-Oct 4-Nov 9-Nov 14-Nov 19-Nov 24-Nov

TIME

MO

DIS

ND

VI

0

10

20

30

40

50

60

70

80

90

Ra

infa

lls (mm

)

Rainfalls (Max)

Rainfalls (MEAN)

Rainfalls MIN

Cullingral

Merriwa Park

Midlothian

Dales

Illogan

Roscommon

Stanley

Pembroke

NDVI versus TIME

Viviana Maggioni

2nd NAFE Workshop

NDWI versus TIME

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1


TIME

ND

WI

21

30

0

10

20

30

40

50

60

70

80

90

Ra

infa

lls (mm

)

Rainfalls (MAX)

Rainfalls (MEAN)

Rainfalls (MIN)

Cullingral

Merriwa Park

Midlothian

Dales

Illogan

Roscommon

Stanley

Pembroke

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1


TIME

ND

WI

16

40

0

10

20

30

40

50

60

70

80

90

Ra

infa

lls (mm

)

Rainfalls (MAX)

Rainfalls (MEAN)

Rainfalls (MIN)

Cullingral

Merriwa Park

Midlothian

Dales

Illogan

Roscommon

Stanley

Pembroke

Viviana Maggioni

NIR – SWIR1640nm

NIR + SWIR1640nm

NDWI1640=_______

_______NIR + SWIR2130nm

NIR - SWIR2130nmNDWI2130=

2nd NAFE Workshop

VWC Relationships

y = 4.8134x - 0.5456

y = 0.214x + 0.2348

0

0.5

1

1.5

2

2.5

3

3.5

0 0.2 0.4 0.6 0.8 1

GROUND NDVI

VW

C (

kg/m

^2)

NATIVE

CROP

Linear (CROP)

Linear (NATIVE)

y = 0.1496x + 0.3184

y = 13.204x2 + 1.621x0

0.5

1

1.5

2

2.5

3

3.5

0 0.2 0.4 0.6

NDWI 1640

VW

C (

kg/m

^2)

NATIVE

CROP

Linear (NATIVE)

Poly. (CROP)

y = 11.02x - 3.1207

y = 0.7828x + 0.0063

0

0.5

1

1.5

2

2.5

3

3.5

0 0.1 0.2 0.3 0.4 0.5 0.6

NDWI 2130

VW

C (

kg/m

^2)

NATIVE

CROP

Linear (CROP)

Linear (NATIVE)

• Native Grass

• Crop

• Native Grass

• Crop

• Native Grass

• Crop

R-squared RMSE

0.6998 0.0228

0.9573 0.1794

0.9036 0.0206

0.7457 0.4531

0.0295 0.0654

0.7931 0.3861

NDVI

NDWI 2130

NDWI 1640

Viviana Maggioni

2nd NAFE Workshop

Dry Biomass Relationships

• Native Grass

• Crop

• Native Grass

• Crop

• Native Grass

• Crop

R-squared RMSE0.3531 0.0794

0.8292 0.1057

0.4214 0.0956

0.7881 0.1656

0.4121 0.1165

0.5893 0.1932

y = 3.0491x + 0.0099

y = 3.0819x - 0.09250

0.2

0.4

0.6

0.8

1

1.2

1.4

0 0.2 0.4 0.6

NDWI 1640

DR

Y B

IOM

AS

S (

kg/m

^2) CROP

NATIVE

Linear (CROP)

Linear (NATIVE)

y = 1.3156x + 0.0244

y = -0.3597x + 0.72130

0.2

0.4

0.6

0.8

1

1.2

1.4

0 0.2 0.4 0.6 0.8 1

NDVI

DR

Y B

IOM

AS

S (

kg/m

^2) CROP

NATIVE

Linear (CROP)

Linear (NATIVE)

y = 2.3046x - 0.1634

y = 1.042x + 0.1230

0.2

0.4

0.6

0.8

1

1.2

1.4

0 0.2 0.4 0.6

NDWI 2130

DR

Y B

IOM

AS

S (

kg/m

^2) CROP

NATIVE

Linear (CROP)

Linear (NATIVE)

NDVI

NDWI 1640

NDWI 2130

Viviana Maggioni

2nd NAFE Workshop

VWC & Dry Biomass versus TIME

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5


TIME

VW

C (

kg/m

^2)

0

10

20

30

40

50

60

70

80

90R

ain

falls (m

m)

Rainfalls (Max)

Rainfalls (MEAN)

Rainfalls MIN

Cullingral

Merriwa Park

Midlothian

Dales

Illogan

Roscommon

Stanley

Pembroke

0

0.5

1

1.5

2

2.5

3


TIME

Dry

Bio

ma

ss (

kg/m

^2)

0

10

20

30

40

50

60

70

80

90

Ra

infa

lls (mm

)

Rainfalls (Max)

Rainfalls (MEAN)

Rainfalls MIN

Cullingral

Merriwa Park

Midlothian

Dales

Illogan

Roscommon

Stanley

Pembroke

Viviana Maggioni

2nd NAFE Workshop

MODIS Data31 OCT 3 NOV2 NOV1 NOV 5 NOV

6 NOV 11 NOV9 NOV8 NOV7 NOV

13 NOV12 NOV 17 NOV16 NOV14 NOV

22 NOV21 NOV19 NOV18 NOV 23 NOV

Viviana Maggioni

2nd NAFE Workshop

How many samples?

0

0.5

1

1.5

2

2.5

1 2 3 4 5 6 7 8 9 10 11 12 13 14

MERRIWA PARK WEEK 1V

WC

(kg

/m^2

)

0

0.5

1

1.5

2

2.5

1 2 3 4 5 6 7 8 9 10 11 12 13 14

MERRIWA PARK WEEK 3

VW

C (

kg/m

^2)

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

STANLEY WEEK 1

VW

C (

kg/m

^2)

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

STANLEY WEEK 3

VW

C (

kg/m

^2)

Viviana Maggioni

2nd NAFE Workshop

Next Steps

• Landcover map

• Thumbnails of spatial VWC

• Aircraft NDVI validation

• Microwave Polarization Difference Index (MPDI) relationship

Merriwa Park3

0

Viviana Maggioni

2nd NAFE Workshop

Thank you

Viviana Maggioni

VEGETATION DATA Viviana Maggioni Dr. Jeffrey Walker.

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Transcript of VEGETATION DATA Viviana Maggioni Dr. Jeffrey Walker.