旱灾灾情监测中的遥感应用综述.docx

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旱灾灾情监测中的遥感应用综述

231

Vol.23No.1

20082REMOTESENSINGTECHNOLOGYANDAPPLICATIONFeb.2008

 

,

(,/,100875)

 

:

,MODIS,

:

;;

:

TP79:

A:

10040323(2008)01011106

 

1

 

,

195020002114

hm2,14.9%,

2

:

p=c

(1)

:

p,

,c

912.5hm2,6.3%[1]

 

2060,

NOAA/AVHRRLandsat

TMMODIS

GISGPS,

,,

Watson[2,3]

,

c

Price[49]

(ATI)(P),

 

ATI=(1-A)/(Td-Tn)

(2)

:

TdTn,NOAA/

AVHRR4

(ATI)(W),

:

:

20070514;:

20071031

:

(2006BAD20B0204)

:

(1982-),,,GIS,Email:

guohu@ires.cn

:

(1974-),,,Email:

wy@ires.cn

11223

 

W=a+bATI(3)

:

W,ab

:

CWSI=[(1+rc/ra)-]/[+(1+rc/ra)](5)

:

=(1+rcp/ra),rcp

 

[10]MODIS,

200523

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[12]NO

AA/AVHRR,0

10cm1020cm,,

010cm

11%;1020cm

12.8%

[12],

3

 

 

(CropWaterStressIndex,CW

SI)Jackson[13]

:

CWSI=1-LE/LP(4)

:

LE,LP

(),

ra,rc

LE

CWSI,,

[1416]

GIS,

[17]

20012002

CWSI

Moran[18](WaterDeficit

Index,WDI),:

WDI=[(Ts-Ta)max-(Ts-Ta)r]/

[(Ts-Ta)max-(Ts-Ta)min](6)

:

Ts,Ta

WDI,

[18]

[19]MODIS,

200045

 

4

,

,

:

 

1:

113

 

4.1

(AnomalyVegetationIndex,AVI):

AVI=NDVIi-NDVI(7)

:

NDVIi()NDVI

NDVINDVI

AVI0,;

AVI0,

AVI-0.1-0.2,

-0.3-0.6

[20],NOAA/

AVHRR2000

3

,

[21]

;[22]

19821998(1999)

AVHRRNDVI

NDVI,

18a

4.2

(VegetationConditionIndex,VCI):

VCI=NDVIi-NDVImin/NDVImax-NDVImin(8)

:

NDVIiiNDVI

NDVImaxNDVImini

NDVI

(VegetationConditionIndex,

VCI)NDVI

NDVI,

[23,24][25,26]NOAA/AVHRR

NDVI,

102

(-20cm),

4.3

:

NDVIj=NDVIj-NDVIj-1(9)

:

NDVIjj,NDVIj

NDVIj-1j

NDVIj,

;NDVIj

[27][27]

20012002

4.4

(VegetationSupplicationWater

Index,VSWI):

VSWI=NDVI/Ts(10)

:

TsNDVI

VSWI,VSWI

,

 

NOAA/AVHRR,VSWI

Ts4

[28]NOAA/AVHRR

20012002

[29]

200410

MODIS,

MODISNDVINOAA/AVHRR

NDVI,VSWI

[10]VSWI,ND

VI(EVI),

200545

4.5

Sandholt[30]

(TemperatureVegetationDrynessIndex,TVDI)

:

TVDI=TS-TSmin/TSmax-TSmin(11)

min

:

TS,TS

max

TS=a+bNDVI

11423

 

NDVI,ab

MODIS

TVDI=1,TVDI=0,20053

TVDI,,

[31]MODIS

2003

8916d

t

[32]MODIS

2004

7

5

 

;

 

 

MODIS

MODISAVHRR,

:

AVHRR,12bit,

0.03,,

;MODIS

;MODIS

AVHRR,

AVHRR,MO

DIS,

[33][33,34]

MODIS

[35]MODIS

[10]

5

[36]200481630MODIS

,

 

GIS,MODIS

MODIS,MODIS

 

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