Drought Analysis of Muğla City for 1960-2018 Period

Abstract

The objective of this study is to investigate the meteorological, agricultural and hydrological drought of Muğla city for the period of 1960-2018 as well as to analyse precipitation trend. Monthly total precipitation data for the period of 1960-2018 belonging to Muğla meteorological station obtained from the Turkish State Meteorological Service were used in this study. Run (Swed-Eisenhart) homogeneity test, Mann-Kendall method and Standardized Precipitation Index method were applied to precipitation data. In addition, the severity and duration of droughts were examined. As a result, long years’ precipitation and drought trend were demonstrated for Muğla city. The annual total precipitation for Muğla city in the period 1960-2018 was found to be 1180.2 mm. The lowest amount of precipitation in the study period was 564.6 mm in 2008 and the highest amount of rainfall was 1805 mm in 1969. In the province of Muğla, the number of the humid months was slightly higher than the other classes. In the province of Muğla, the numbers of the mildly humid and moderately dry months were slightly higher than the other classes. It was seen that the numbers of humid and dry months in Muğla province were mostly clustered in mildly humid, moderately humid, mildly dry and moderately dry classes. In addition, analyzes show that drought is less repetitive as the time period increases, but has a longer duration effect. Total drought severity and total drought duration of Muğla station on scales basis coincided with almost similar years. However, in the 3-monthly Standardized Precipitation Index period, the strongest total drought intensity (-13.90) was observed between 2006 December – 2007 September, whereas the long-term (12 months) drought occurred between 2000 June – 2001 May.

Keywords

• drought analysis
• spi methodology
• drought severity and duration
• muğla