Ochi, Shiro 
  
  
Fig-4 Extracted Six River Basins in Asia 
4 ANALYSIS AND SIMULATION 
4.1 Per capita productivity 
Per capita productivity is defined for each pixel as follows. 
(1) Catchment area for a pixel along a river is defined using drainage model. 
(2) Accumulated population in the catchment area is calculated for the pixel. 
(3) Accumulated Cropland NPP(CNPP) in the catchment area is calculated for the pixel. 
(4) Per capita productivity is calculated by dividing the accumulated CNPP by the accumulated population for the pixel. 
(5) Per capita productivity is calculated for all pixels of the six major river basins in Asia. 
Figure-5 and Table-3 show the per capita productivity — relation between accumulated CNPP and accumulated 
population - from the upper stream of the river basin to the bottom of the basin for these six river basins. The slope of 
the regression line means per capta productivity. Per capita production is an indicator to evaluate the potential or 
population carrying capacity, because the indicator can show how much cropland NPP is produced/consumed for one 
person in the basin. So, if the per capita productivity is big, it means that the basin is more rich than the basin with small 
per capita productivity. 
CNPP -a ePopulation KRSOKORAR K G)K KK K K KK IK 
where a: per capita CNPP 
  
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B7. Amsterdam 2000. 1055