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The studied region encompasses a spacious part of southern Iran and includes an area more than seventy thousand square kilometers. The studied region includes hot and dry areas and is impacted by arid and semi-arid climates. The weather of the coastal zone is extremely hot and humid in the summer, as the temperature occasionally exceeds 52°C. The average annual temperature in this region is approximately 27°C. The amounts of monthly precipitation at the six rain-gauge stations located in southern Iran, namely Bandar Abbas, Bandar Lengeh, Jask, Minab, Kish Island and Abomoosa Island between 1986 and 2014 are used in this investigation. There is no significant difference between the elevations of the studied areas (5 to 30 meters above the sea level). The climate at each station was determined using the De Martonne (1923) aridity index shown in Equation (1).
formula
1
where P and T are the average annual precipitation (mm) and temperature (°C), respectively. Figure 1 shows the geographical area of the studied region. Table 1 includes geographic coordinates of the examined weather stations, their elevations, and characteristics of the monthly precipitation data.
Table 1

Statistics of precipitation data and geographic position of selected rain gauge stations

 Abomoosa IslandBandar AbbasJaskBandar LengehKish IslandMinab
Geographic position Latitude (N) 25 °50′ 27 °13′ 25 °38′ 26 °32′ 26 °30′ 27 °6′ 
Longitude (E) 54 °50′ 56 °22′ 57 °46′ 54 °50′ 53 °59′ 57 °5′ 
Elevation (m) 6.6 9.8 5.2 22.7 30.0 29.6 
Statistics of precipitation data Index of aridity 0.280 0.383 0.272 0.276 0.364 0.436 
Climate type Dry Dry Dry Dry Dry Dry 
Min rainfall (mm) 
Max rainfall (mm) 205 194.7 312 184.4 209.6 195.3 
Mean rainfall (mm) 10.653 14.128 10.181 10.435 12.805 16.804 
Standard deviation 28.037 33.402 29.876 27.126 30.78 35.979 
 Abomoosa IslandBandar AbbasJaskBandar LengehKish IslandMinab
Geographic position Latitude (N) 25 °50′ 27 °13′ 25 °38′ 26 °32′ 26 °30′ 27 °6′ 
Longitude (E) 54 °50′ 56 °22′ 57 °46′ 54 °50′ 53 °59′ 57 °5′ 
Elevation (m) 6.6 9.8 5.2 22.7 30.0 29.6 
Statistics of precipitation data Index of aridity 0.280 0.383 0.272 0.276 0.364 0.436 
Climate type Dry Dry Dry Dry Dry Dry 
Min rainfall (mm) 
Max rainfall (mm) 205 194.7 312 184.4 209.6 195.3 
Mean rainfall (mm) 10.653 14.128 10.181 10.435 12.805 16.804 
Standard deviation 28.037 33.402 29.876 27.126 30.78 35.979 
Figure 1

Study area and location of stations.

Figure 1

Study area and location of stations.

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