RAINFALL AND RUNOFF IN YEMEN

This paper makes use of a water balance study of a mountainous area wi th a wide range of average annual rainfall in an arid and semiarid reg ion to illustrate the development of both a statistical model of daily rainfall and a rainfall-runoff model. The models are appropriate for these conditions and may be relevant to similar areas. Comparisons of mean rainfall and runoff at the arid end of the scale suggest that run off coefficients do not conform to common assumptions.