7 6 



PROCEEDINGS OE THE 



RAINFALL AND RUN-OFF DURING JANUARY, FEBRUARY, AND 



MARCH, 1900. 



Area of Condition 



Pre- 

 cipita- 

 tion. 

 Inches. 

 24 

 24 

 24 

 16 



Run-off Run-off in 



per square percentage of 



mile. precipitation. 

 Acre feet. Percent. 



452- 

 428- 



557- 

 828- 



35 

 33 

 43 

 95 



"The most striking feature of this table as compared 

 with the previous one is the uniformly large run-off 

 as compared with the rainfall. This clearly shows 

 the enormous amount of water taken up by a dry soil, 

 either forested or non-forested, as compared with 

 one already nearly filled to saturation. During the 

 three months here noted; on the forested basins about 

 three-eighths of the rainfall appeared in the run-off. 



RAPIDITY OF DECREASE IN RUN-OFF AFTER THE CLOSE OF THE 



RAINY SEASON. 



Area of Condition 



Pre- April May June 



cipita- run-off run-off run-off 



tion. per sq. m. persq. m. per sq. m. 



In dies. A ere feet. A ere feet. A ere feet. 



1.6 153- 65- 25- 



1.6 146 70 30 



1.6 166- 74- 30- 



56- 



2 



"The above table clearly shows the importance of 

 forests in sustaining the flow of mountain streams. 

 The three forested catchment areas, which, during 

 December, experienced a run-off of but 5 per cent, 

 of the heavy precipitation for that month and which 



