Abstract
In order to clarify the agricultural activities on the characteristics of material flow in rural area, nitrogen flow and runoff model is developed taking cropping types and their spatial distribution patterns into consideration. Based on the examination results of spatial distribution paterns of the cropping types using seasonal remote-sensing date, the nitrogen flow and runoff model is simulated. The calcuated annual nitrogen runoff from small catchment where various crops are cultivated, is varied from 2.7kg·ha-1·yr-1 to 108kg·ha-1·yr-1. Thus, it is suggested that spatial distribution patterns of nutrients input and intake through agricultural activities should be considered to analyze material flows in rural area for watershed environmental control and regional agricultural management.
