Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   IRAN-WATER RESOURCES RESEARCH   SPRING 2017 , Volume 13 , Number 1 ; Page(s) 204 To 210.
 
Paper: 

SPECTRAL ANALYSIS OF FLOW- PRECIPITATION FLUCTUATIONS IN DINEVAR BASIN

 
 
Author(s):  MIRZAEE S.Y., AZARI A.*, PARHAM G.A.
 
* DEPARTMENT OF WATER ENGINEERING, RAZI UNIVERSITY, KERMANSHAH, IRAN
 
Abstract: 

In this research the flow-precipitation fluctuations in 9 station in Dinevar basin were analyzed by spectral density functions and Autocorrelation Functions in the frequency and time domain. First fluctuations in the correlogram of each time series were analyzed. Then Spectral density functions based on the Fourier series were used to check the time series in the frequency domain. In this regard, the Spectrum value of each flow and rainfall series was calculated and the periodogram of each series was produced. The Periodograms showed fluctuations in several frequencies. These were seasonal fluctuations with frequency 0.083 (return period of 12 months), short term fluctuations with frequency 0.25 (return period of 4 months), and midterm fluctuations with frequency 0.167 (return period of 4 months). Fluctuations were not observed for return period of 6 months in Precipitation data. Cross spectral analysis of data showed high match levels in frequencies 0.083 and 0.25. Also the estimated values of delay by cross spectral analysis for precipitation seasonal fluctuations (0.083) and its effect on the seasonal flow fluctuations was estimated as about 1.5 months. The delay was determinate as 0.4, 0.5, and 0.14 months for fluctuations with smaller return periods. According to the spectral analysis results for precipitation data in all stations, after removing the frequency and trends, a long term fluctuation (cycle) was observed in frequency 0.01 (100 months) that can be associated to the Wet and dry periods in this region.

 
Keyword(s): FLOW, PRECIPITATION, SPECTRAL ANALYSIS, COHERENCY FUNCTIONS, PHASE FUNCTIONS
 
 
References: 
  • ندارد
  •  
 
Click to Cite.
APA: Copy

MIRZAEE, S., & AZARI, A., & PARHAM, G. (2017). SPECTRAL ANALYSIS OF FLOW- PRECIPITATION FLUCTUATIONS IN DINEVAR BASIN. IRAN-WATER RESOURCES RESEARCH, 13(1 ), 204-210. https://www.sid.ir/en/journal/ViewPaper.aspx?id=569208



Vancouver: Copy

MIRZAEE S.Y., AZARI A., PARHAM G.A.. SPECTRAL ANALYSIS OF FLOW- PRECIPITATION FLUCTUATIONS IN DINEVAR BASIN. IRAN-WATER RESOURCES RESEARCH. 2017 [cited 2021May08];13(1 ):204-210. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=569208



IEEE: Copy

MIRZAEE, S., AZARI, A., PARHAM, G., 2017. SPECTRAL ANALYSIS OF FLOW- PRECIPITATION FLUCTUATIONS IN DINEVAR BASIN. IRAN-WATER RESOURCES RESEARCH, [online] 13(1 ), pp.204-210. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=569208.



 
 
Yearly Visit 56 Persian Abstract
 
Latest on Blog
Enter SID Blog