抄録
The present paper discusses the effect of the lumping scale on runoff. The procedure of this study is (1) to decide the first order stream in a small mountainous basin by using digital map statistically and theoretically.(2) to constract a basic equation expressing the contributing area concept.(3) to compare the runoff characteristics of small and large basins (4) to predict the runoff in large basins from runoff characteristics in small basins.
