احتمالات هطول الأمطار و درجة الاعتماد عليها في المملكة العربية السعودية

Abstract EN

c factor which may influ-؛mat؛؛Saudi Arabia represents a crucial c ٨؛ Rainfall ence various aspects of economic development in the Kingdom.

Nevertheless, amounts disciose very harsh variations from one yearto the other which )؛rainfa poses appreciate problems in the land use of Saudi Arabia.

Thus the study primarily aims at determining the probabiiity of receiving certain rainfall 80% amounts during the year and the amounts of reliable rains that may fall at and 90% probability at different portions of the Kingdom, by applying the prob-ability theory and preparing maps depicting such rainfail characteristics.

From these maps, regions of reliabie rains may be delimited for exercising agricul-able rains which may be؛؛activity, in addition to margins( regions of unre ؛tura ,utilized by means of irrigation or for grazing purposes