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	Long-term trend analysis of rainfall using hybrid Discrete Wavelet Transform (DWT) based Mann-Kendall tests in central Gujarat region, India
	Rajani, Nirav, V; Tiwari, Mukesh K.; Chinchorkar, S. S.; Pampaniya, N. K.; Parmar, Sanjay
通讯作者	Tiwari, MK
来源期刊	MAUSAM
ISSN	0252-9416
出版年	2020
卷号	71 期号:2 页码:209-224
英文摘要	Trend analysis has become one of the most important issues in hydro-meteorological variables study due to climate change and the focus given to it in the recent past from the scientific community. In this study, long-term trends of rainfall are analyzed in eight stations located in semi-arid central Gujarat region, India by considering time series data of 116 years (1901-2016). Discrete wavelet transform (DWT) as a dyadic arrangement of continuous wavelet transformation combined with the widely applied and acknowledged Mann-Kendall (MK) trend analysis method were applied for analysis of trend and dominant periodicities in rainfall time series at monthly, annual and monsoonal time scales. Initially, rainfall time series applied in this study were decomposed using DWT to generate sub-time series at high and low frequencies, before applying the MK trend test. Further, the Sequential Mann-Kendall (SQMK) test was also applied to find out the trend changing points. The result showed that at the monthly annual and monsoon time scales, the trends in rainfall were significantly decreasing in most of the station. The 4-month and 8-month components were found as dominant at the monthly time series and the 2-year and 4-year component were found as dominant at the monsoon time series, whereas the 2-year components were observed as dominant in the annual time scale.
英文关键词	Trend analysis Periodicity Rainfall Mann-Kendall test Discrete wavelet transform
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000538384900004
WOS关键词	DOMINANT PERIODICITIES ; TEMPERATURE-CHANGES ; PRECIPITATION ; STREAMFLOW ; BASIN ; ONTARIO ; QUEBEC
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324660
作者单位	[Rajani, Nirav, V; Tiwari, Mukesh K.; Chinchorkar, S. S.; Pampaniya, N. K.; Parmar, Sanjay] Anand Agr Univ, CAET, Godhra 388110, Gujarat, India
推荐引用方式 GB/T 7714	Rajani, Nirav, V,Tiwari, Mukesh K.,Chinchorkar, S. S.,et al. Long-term trend analysis of rainfall using hybrid Discrete Wavelet Transform (DWT) based Mann-Kendall tests in central Gujarat region, India[J],2020,71(2):209-224.
APA	Rajani, Nirav, V,Tiwari, Mukesh K.,Chinchorkar, S. S.,Pampaniya, N. K.,&Parmar, Sanjay.(2020).Long-term trend analysis of rainfall using hybrid Discrete Wavelet Transform (DWT) based Mann-Kendall tests in central Gujarat region, India.MAUSAM,71(2),209-224.
MLA	Rajani, Nirav, V,et al."Long-term trend analysis of rainfall using hybrid Discrete Wavelet Transform (DWT) based Mann-Kendall tests in central Gujarat region, India".MAUSAM 71.2(2020):209-224.