Calculation the Drought Index and Determination the Type of Climate for the Rainy Months in the Selected Stations in Iraq

Abstract

This Study aims to calculate the drought index by application the de Martine equation and determine the type of climate for rainy months in the three selected stations in Iraq (Mosul, Baghdad and Nasiriya) by use data of (Rainfall and Temperature) for the period ranged (1970 to 2010), which was recorded from the "Iraqi Meteorological Organization and seismology" in Baghdad. The results appears that the climate is humid in the months (December and January), the climate is variable between (wet and semiarid) in the months (February, March, April and November), while the climate is variable between (semiarid and arid) in the months (May and October) as a result of variation the values of (Rainfall and Temperature) for rainy months in the three studying stations. In this research the relationship between values of drought index and the rainfall amount and temperatures has been showing by calculation the correlation coefficient and also obtained simple linear regression by applying program of Microsoft excel (2010), the results indicated the existence of strong linear correlation between the drought index and rainfall in Kirkuk University Journal /Scientific Studies (KUJSS) Volume 15, Issue 2, June 2020 , pp. (63-78) ISSN: 1992-0849 (Print), 2616-6801 (Online) Web Site: www.uokirkuk.edu.iq/kujss E-mail: kujss@uokirkuk.edu.iq, kujss.journal@gmail.com 65 the three studying stations values between (0.96) – (0.98), while the results showed the occurring of strong inverse correlation between the drought index and temperatures in the three studying stations values between (-0.93) – (-0.98) in the three stations.