الهطول المطري وقياس مؤشر الجفاف الاستطلاعي لمدينة ترهونة - شمال غرب ليبيا

his study addressed the use of climate data that is available on the POWER NASA dataset,

which provides climate data with spatial accuracy half an altitude degree × half a longitude,

with time accuracy of 3 hours. Data of precipitation and great and small temperatures for the

period 1982-2020 were used in this study with 38 rainy seasons. The study aims to use climate

data to extract some climatic factors for the study area, such as the RDI measurement, as well

as the design of a curve (density-duration- repetition) of precipitation (IDF). One of the findings

of the study is that the precipitation season in the city of Tarhuna usually begins during

September and ends during April, and that the annual precipitation rate has reached 259 mm,

but nearly 50% of the precipitation seasons did not reach the annual average precipitation value,

and that the probability of repeating annual rainfall so high that it provides a near-humid climate

is once every 20 years. Also, the months of November, March and, April had a clear decrease in precipitation, with an increase in the number of dry seasons over the past 38 years as a result

of an increase in the monthly average temperature by more than half a Celsius degree at the

most months of the year, which will lead to the possibility of increased evapotranspiration rates

with a rise in drought rates. These climatic conditions require appropriate arrangements to

reduce drought, with the need to make the most of precipitation through successful ways to

harvest all rainfall .