Ochi, Shiro
Crop production analysis is made using administrative boundary, statistics of agricultural production
and population, land cover data and NPP. Finally, per capita crop production analysis is made using crop land suitability
map, drainage model and the output of crop production analysis. The detail of the source data is described as follows:
—
Crop Land suitability Map
Administration Boundary
| Agricultural Production
| Land Cover Data Le
Map data
Per capita production
analysis for river basins
Drainage Model
Crop production analysis
Net Primary Production
Satellite Data I Statistics | |
Photosynthesis Active
Radiation Data
Figure-1 Flow of Data Processing
(1) Digital Elevation Model(DEM): GTOPO30, which is 30 second arc resolution(approx. 1km resolution)
produced by U.S. Geological Survey(USGS). The data can be downloaded from internet URL :
http://edcdaac.usgs.gov/gtopo30/gtopo30.html.
(2) River Network and (3) Administrative boundary map: Rasterized River Network image is generated from Digital
Chart of the World(DCW) using ARC/Info - “linegrid” - command. The DCW data can be downloaded from internet
URL: http://www.nima.mil/publications/guides/dtf/dcw.html.
(4) Agricultural Production: Agricultural production data is retrieved from FAOSTAT Agricultural Data URL:
http://apps.fao.org/. In this study, “cereal production” is used to represent agricultural production.
(5) Population data: CIESIN(Consortium for International Earth Science Information Network) provides 5 minutes
population data which were interpolated from the population census in 1994. The CIESIN URL is
http://www.ciesin.org/.
(6) Land Cover Data: Land cover data were retrieved from USGS Global Land Cover Characteristics Data Base
retrieved at the URL: http://edcwww.cr.usgs.gov/landdaac/glcc/glcc_na.html. There are 6 maps in different schemes in
the data base, and IGBP Legend map was used in this study.
(7) NDVI Data: Monthly NDVI data from January 1982 to December 1993 were composed using 8km resolution 10
days composite data set given as NOAA/NASA Pathfinder AVHRR Land Data Set.
(8) PAR Data: One degree monthly Photosynthesis Active Radiation(PAR) data from January 1979 to December
1989 were provided using TOMS satellite data(Dye et al, 1993). In this study, interpolated 8km resolution averaged
monthly PAR data were used in order to calculate NPP of 1981 to1989.
3 METHODOLOGY AND OUTPUT
3.1 Estimation of Net Primary Productivity
Monthly Net Primary Productivity(NPP) can be estimated using NDVI and PAR data by “production efficiency
approach” proposed by Goward and Huemmrich(1992) and Ruimy, Saugier and Dedien(1994).
1052 International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B7. Amsterdam 2000.
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