The results of Gafur et al. (2003) suggest annual direct runoff from small watersheds under long term fallow and/or perennial vegetation vary typically between 15 and 24% of the annual rainfall.
The results of Gafur et al. (2003) suggestannual direct runoff from small watersheds under long term fallowand/or perennial vegetation vary typically between 15 and 24% of the annualrainfall.