CYCLE ANALYSIS OF TIME SERIES OF ANNUAL PRECIPITATION HELEH ANDMOND BASIN

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SALIGHEH MOHAMMAD; ASAKEREH HOSSEIN; NASSERZADEH MOHAMMAD HOSSEIN; BALYANI YADOLLAH

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Journal: JOURNAL OF GEOGRAPHICAL SCIENCES Year:2015 | Volume:15 | Issue:37 Page(s): 0-0

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Title

CYCLE ANALYSIS OF TIME SERIES OF ANNUAL PRECIPITATION HELEH ANDMOND BASIN

Author(s)

SALIGHEH MOHAMMAD | ASAKEREH HOSSEIN | NASSERZADEH MOHAMMAD HOSSEIN | BALYANI YADOLLAH | Issue Writer Certificate

Keywords

TREND MODELINGQ2

ANNUAL RAINFALLQ2

SPECTRAL ANALYSISQ2

THE NORTHERN PERSIANGULFQ2

HELEH AND MOND WATERSHEDQ2

Abstract

Precipitation is one of the most intractable elements. Therefore, understanding its oscillatory behavior is the requirements of environmentalplanning (awareness of overt and covert behavior), this is the key variable. Spectrum and trend analysis techniques are the suitable methods tounderstand the visible and invisible behavior for the extraction and analysisof climate oscillations with different wave lengths. The size range of thedistribution variance across all wave lengths may provide time series. In thisstudy, data from 37 stations HELEH AND MOND WATERSHED (both rain andsynoptic) from its inception until 2011, who had over 30 years of data, toanalyze the cycle of ANNUAL RAINFALL, interest has been taken. Accordingly, inthe first step the polynomial modeling was evaluated to identify trends inannual precipitation (linear or quadratic pattern) in the study area. Then, using by SPECTRAL ANALYSIS on this basis, the annual precipitation priodogramsin 95 percent for each of stations were estimated and meaningful cycles ofthe time series were extracted. According to the results of this study, it wasfound that the ANNUAL RAINFALL in all stations in the basin, has decreased are, and among 11 stations according to the statistical significance, follow of thelinear and quadratic pattern, which implies a reduction in ANNUAL RAINFALL ofstations. It also was cleared that the significant 2-3, 3-10 and 10 years cycleswere more common in the study area. So that the cycles of 2-3 years wasmost repeated in the ANNUAL RAINFALL time series.

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APA: Copy

SALIGHEH, MOHAMMAD, ASAKEREH, HOSSEIN, NASSERZADEH, MOHAMMAD HOSSEIN, & BALYANI, YADOLLAH. (2015). CYCLE ANALYSIS OF TIME SERIES OF ANNUAL PRECIPITATION HELEH ANDMOND BASIN. JOURNAL OF GEOGRAPHICAL SCIENCES, 15(37 ), 0-0. SID. https://sid.ir/paper/366834/en

Vancouver: Copy

SALIGHEH MOHAMMAD, ASAKEREH HOSSEIN, NASSERZADEH MOHAMMAD HOSSEIN, BALYANI YADOLLAH. CYCLE ANALYSIS OF TIME SERIES OF ANNUAL PRECIPITATION HELEH ANDMOND BASIN. JOURNAL OF GEOGRAPHICAL SCIENCES[Internet]. 2015;15(37 ):0-0. Available from: https://sid.ir/paper/366834/en

IEEE: Copy

MOHAMMAD SALIGHEH, HOSSEIN ASAKEREH, MOHAMMAD HOSSEIN NASSERZADEH, and YADOLLAH BALYANI, “CYCLE ANALYSIS OF TIME SERIES OF ANNUAL PRECIPITATION HELEH ANDMOND BASIN,” JOURNAL OF GEOGRAPHICAL SCIENCES, vol. 15, no. 37 , pp. 0–0, 2015, [Online]. Available: https://sid.ir/paper/366834/en

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