Mapping paddy rice yield in Zhejiang Province using MODIS spectral index

Qian CHENG*; Xiuju WU

Makale detayları

Mapping paddy rice yield in Zhejiang Province using MODIS spectral index

Yazarlar:

Qian CHENG* | Xiuju WU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2011 Vol.35 Issue 6, pp.579-589

Belge Tipi:

Makale

Yayın Tarihi:

5/2011

Belge Dili:

Türkçe

Document ID (Org No.):

2000808019

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Anahtar kelimeler:

Özet:

 

The first 19 bands of a moderate-resolution imaging spectrometer (MODIS), covering the visible to shortwave infrared spectral wavelength, were simulated by ground-level reflectance spectra. All spectral indices similar to the normalized difference vegetation index (NDVI) and ratio vegetation index (RVI) formed by every 2 bands were calculated to obtain their determination coefficients, with theoretical and real yield. Results revealed that the combinative near-infrared (NIR) index (band 2 and band 19, symbol b2 and b19, and other similar ones) and the (b16, b19) of MODIS were strongly correlated with rice yield, especially the correlative coefficient that exceeded significant levels in the maturing stage. However, combinative visible light index was correlated with rice yield strongly in the early stage and poorly in the latter stage. The best spectral indices for predicting rice yield in whole rice growth were the combinations of (b2, b19) and (b16, b19). Based on the 2-band combination of the (b2, b19) of MODIS and the constructed estimating model, the rice yield of Zhejiang Province was estimated and its spatial distribution was mapped. Estimated results based on MODIS images were validated using 8 measured validation sites. Errors in the estimated rice yield ranged from 3.2% to 20.3%, with a mean value of 10.1%. The results indicated that the 2-band combination of the (b2, b19) MODIS index was most suitable for monitoring rice yield.

 

The first 19 bands of a moderate-resolution imaging spectrometer (MODIS), covering the visible to shortwave infrared spectral wavelength, were simulated by ground-level reflectance spectra. All spectral indices similar to the normalized difference vegetation index (NDVI) and ratio vegetation index (RVI) formed by every 2 bands were calculated to obtain their determination coefficients, with theoretical and real yield. Results revealed that the combinative near-infrared (NIR) index (band 2 and band 19, symbol b2 and b19, and other similar ones) and the (b16, b19) of MODIS were strongly correlated with rice yield, especially the correlative coefficient that exceeded significant levels in the maturing stage. However, combinative visible light index was correlated with rice yield strongly in the early stage and poorly in the latter stage. The best spectral indices for predicting rice yield in whole rice growth were the combinations of (b2, b19) and (b16, b19). Based on the 2-band combination of the (b2, b19) of MODIS and the constructed estimating model, the rice yield of Zhejiang Province was estimated and its spatial distribution was mapped. Estimated results based on MODIS images were validated using 8 measured validation sites. Errors in the estimated rice yield ranged from 3.2% to 20.3%, with a mean value of 10.1%. The results indicated that the 2-band combination of the (b2, b19) MODIS index was most suitable for monitoring rice yield.

Makale detayları

Mapping paddy rice yield in Zhejiang Province using MODIS spectral index

Yazarlar:

Qian CHENG* | Xiuju WU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2011 Vol.35 Issue 6, pp.579-589

Belge Tipi:

Makale

Yayın Tarihi:

5/2011

Belge Dili:

Türkçe

Document ID (Org No.):

2000808019

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Key words: Estimation

rice yield

MODIS

spectral index

Sayı

Makale detayları

Mapping paddy rice yield in Zhejiang Province using MODIS spectral index

Yazarlar: Qian CHENG* | Xiuju WU

Yayıncı: TUBITAK

Dergi: Turkish Journal of Agriculture and Forestry 2011 Vol.35 Issue 6, pp.579-589

Belge Tipi: Makale

Yayın Tarihi: 5/2011

Belge Dili: Türkçe

Document ID (Org No.): 2000808019

Sıklık: İki Aylık

eISSN: 1303-6173

pISSN: 1300-011X

Key words: Estimation

rice yield

MODIS

spectral index

Sayı

Yazarlar:

Qian CHENG* | Xiuju WU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2011 Vol.35 Issue 6, pp.579-589

Belge Tipi:

Makale

Yayın Tarihi:

5/2011

Belge Dili:

Türkçe

Document ID (Org No.):

2000808019

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X