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Proceedings Paper

Evaluation of change in rice cropping in the marginal zone
Author(s): Katsuo Okamoto; Hiroyuki Kawashima
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Paper Abstract

We detected a change in the area of rice-planted fields using multitemporal satellite images, and investigated the cause from a geographical point of view. Rice is the staple food of Asian people. Rice is cultivated in warm places. In marginal zones, external causes, such as socioeconomic and natural causes strongly affect the decision of a farmer to cultivate rice or not. We selected the northern part of Japan as a test site. The air temperature of this site in a rice-growing season is at the lower limit for rice cropping in a normal year. We first classified the Landsat TM data acquired on 22 May 1999 and estimated the area of rice-planted fields. Then, we determined rice-planted fields using the RADARSAT SAR data acquired on 22 May and 11 June 2001, and detected a change in the area of rice-planted fields between 1999 and 2001. The result shows that the decrease in the area of rice-planted fields in the coastal zone is greater than that in the inland zone. According to climatic data, the air temperature in the coastal zone is lower than that in the inland zone. The lower temperature in the coastal zone is disadvantageous to rice cropping.

Paper Details

Date Published: 17 March 2003
PDF: 9 pages
Proc. SPIE 4879, Remote Sensing for Agriculture, Ecosystems, and Hydrology IV, (17 March 2003); doi: 10.1117/12.462469
Show Author Affiliations
Katsuo Okamoto, National Institute for Agro-Environmental Sciences (United States)
Hiroyuki Kawashima, Univ. of Tokyo (United States)


Published in SPIE Proceedings Vol. 4879:
Remote Sensing for Agriculture, Ecosystems, and Hydrology IV
Manfred Owe; Guido D'Urso; Leonidas Toulios, Editor(s)

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