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Meteorology and Atmospheric Physics

, Volume 128, Issue 2, pp 181–196 | Cite as

Spatial and temporal changes of precipitation concentration in Fars province, southwestern Iran

  • Javad AbolverdiEmail author
  • Ghasem Ferdosifar
  • Davar Khalili
  • Ali Akbar Kamgar-Haghighi
Original Paper

Abstract

Spatial and temporal changes in precipitation concentration are investigated using precipitation concentration index (CI), precipitation concentration period (PCP) and precipitation concentration degree (PCD). The non-parametric Mann–Kendall test is used to detect monotonic trends in CI time series. The study area is Fars province (southwestern Iran), represented by 47 recording gauges with daily precipitation time series records of at least 30 years, ending in 2008. The results revealed that based on CI values two sub-regions were identified, the central/northern sub-region with low CI values (high rainfall depths/several rainy days) and the southern sub-region with low rainfall/few rainy days. PCP analysis indicated an earlier arrival of the rainy season in western parts compared to eastern Fars province and also that annual precipitation mainly falls in winter. However, PCD analysis revealed that annual precipitation in northwestern Fars is less concentrated in several months, whereby, concentration in several months is observed in other parts of the study area. Significant upward trends at 5 % significance level is detected in 19 out of 47 stations with the tendency for occurrence of a rather high percentage of the annual total precipitation in a few days, which has the potential to cause major floods or droughts.

Keywords

Concentration Index Lorenz Curve Annual Total Precipitation Kendall Test Fars Province 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Wien 2015

Authors and Affiliations

  • Javad Abolverdi
    • 1
    Email author
  • Ghasem Ferdosifar
    • 2
  • Davar Khalili
    • 3
  • Ali Akbar Kamgar-Haghighi
    • 3
  1. 1.Regional Water Company of FarsFarsIran
  2. 2.Regional Water Company of BushehrBushehrIran
  3. 3.Water Engineering DepartmentCollege of Agriculture, Shiraz UniversityShirazIran

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