Management of natural hazards in the city of Yasuj

Abstract

Irregular distribution, temporal and spatial distribution, and heavy precipitation are among the characteristics of arid and semi-arid regions, which in some cases leads to droughts and occasional floods. Iran has an arid and semi-arid climate, and the amount of rain is uneven, which has led to climate change, especially droughts and floods, and has become a major concern for the country's authorities these days. Accordingly, it is necessary to identify solutions to reduce the damages resulting from such accidents, which we will focus on in this study, with a focus on the Yasuj area. The main method of this research, given its nature, was applied in the form of an applied purpose and in a descriptive analytical form. Accordingly, in this study, in addition to the correct depiction of crisis management and precipitation management, efforts were made to address the causes of weather hazards. Results were determined using long-term Yasuj precipitation data in an Excel environment while performing an accuracy test (RANT test) and fit test (MACOS). According to the Wembley formula, 1293.5 mm of precipitation occurs at Yasuj during the 32-year return period. During the 31-year statistical period (1987-2017), according to the SPI for 13 years, we experienced drought (moderate 8 years, average 3 years, severe and very severe for each year