Trends in Temperature and Precipitation in the Zhangweinan River Basin during the last 53 Years

Yang, Xiaohua; Xu, Lirong; Liu, K.K.; Li, C.H.; Hu, Jian; Xia, Xingsheng

doi:10.1016/j.proenv.2012.01.190

Cited by 33 publications

(16 citation statements)

References 1 publication

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“…The MK test analysis technique was widely used in detecting trends in climate variables [5,8,[22][23][24][25][26]. The prewhitening procedure was carried out before completing the MK test to eliminate the influence of autocorrelation on the results of the test.…”

Section: Mann-kendal Testmentioning

confidence: 99%

Recent Trends in Temperature and Precipitation in the Langat River Basin, Malaysia

Amirabadizadeh

Huang

Lee

2015

Advances in Meteorology

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A study was undertaken to detect long-term trends in the annual and seasonal series of maximum and minimum temperatures. Measurements were taken at 11 meteorological stations located in the Langat River Basin in Malaysia. The rainfall and maximum and minimum temperature data were obtained from the Malaysia Meteorological Department (MMD) and the Department of Irrigation and Drainage (DID) Malaysia. The procedures used included the Mann-Kendall test, the Mann-Kendall rank statistic test, and the Theil-Sen’s slope method. The analytical results indicated that when there were increasing and decreasing trends in the annual and seasonal precipitation and temperature, only the increasing trends were significant at the 95% confidence level. The Theil-Sen’s slope method showed that the rate of increment in the annual precipitation is greater than the seasonal precipitation. A bootstrap technique was applied to explore uncertainty about significant slope values for rainfall, as well as the maximum and minimum temperatures. The Mann-Kendall rank statistics test indicated that most of the trends in the annual and seasonal time series started in the year 2000. All of the annual and seasonal significant trends were obtained at the stations located in the north, east, and northeast portions of the Langat River Basin.

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Section: Mann-kendal Testmentioning

confidence: 99%

Recent Trends in Temperature and Precipitation in the Langat River Basin, Malaysia

Amirabadizadeh

Huang

Lee

2015

Advances in Meteorology

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“…The most common nonparametric tests for working with time series trends are the Mann-Kendall [15,16] and Spearman's rho [17,18] tests. The Mann-Kendall test is the most common one used by researchers in studying hydrologic time series trends [19][20][21][22][23]; less common, Spearman's rho is used to detect monotonic trends in hydrometeorological data [24]. In many studies, Spearman's rho is used in combination with the Mann-Kendall test for comparison purposes [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Precipitation Trends over Time Using Mann-Kendall and Spearman’s rho Tests in Swat River Basin, Pakistan

Ahmad

De-shan

Wang

et al. 2015

Advances in Meteorology

343

190

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Accurately predicting precipitation trends is vital in the economic development of a country. This research investigated precipitation variability across 15 stations in the Swat River basin, Pakistan, over a 51-year study period (1961–2011). Nonparametric Mann-Kendall (MK) and Spearman’s rho (SR) statistical tests were used to detect trends in monthly, seasonal, and annual precipitation, and the trend-free prewhitening approach was applied to eliminate serial correlation in the precipitation time series. The results highlighted a mix of positive (increasing) and negative (decreasing) trends in monthly, seasonal, and annual precipitation. One station in particular, the Saidu Sharif station, showed the maximum number of significant monthly precipitation events, followed by Abazai, Khairabad, and Malakand. On the seasonal time scale, precipitation trends changed from the summer to the autumn season. The Saidu Sharif station revealed the highest positive trend (7.48 mm/year) in annual precipitation. In the entire Swat River basin, statistically insignificant trends were found in the subbasins for the annual precipitation series; however, the Lower Swat subbasin showed the maximum quantitative increase in the precipitation at a rate of 2.18 mm/year. The performance of the MK and SR tests was consistent at the verified significance level.

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“…Another useful indicator is the Kendall slope , which is used to quantify the changing trend, indicating the direction and the size of trend [19]. When > 0, it indicates an upward trend, while < 0 indicates a downward trend.…”

Section: Mann-kendall Testmentioning

confidence: 99%

“…In order to identify the optimal combination of the hydro-climatic data series in the discrete wavelet transform (DWT), the results from DWT were tested by the M-K test. Yang et al [19] concluded temperature and precipitation trends in the Zhangweinan River Basin, based on monthly mean data for 53 years, from 1957 to 2009. They applied Mann-Kendall test method and cumulative anomaly method to analyze the long-term trends.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Variation Trends in Precipitation in an Upstream Catchment of Huai River

Shi

Chen

et al. 2013

Mathematical Problems in Engineering

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We analyzed the variation trends in precipitation according to the observed data in the Shaying River catchment, upstream of the Huai River from 1951 to 2010, using the linear regression method and Mann-Kendall test. Further study was made by introducingR/Sanalysis, and the corresponding Hurst Exponent was estimated to predict the future trends of rainfall. The results suggested that the changing trends in precipitation for different time series in the whole catchment were relatively complex and not obvious. The annual precipitation showed a slightly increasing trend over the past 60 years, and in the future it would be antipersistent. For the 38 rainfall stations, the trends in spring and autumn precipitation time series were mostly negative; on the contrary, the trends in summer and winter were mostly positive. The results also indicated that the annual precipitation series showed positive trends in the northern region and negative trends in the southern region. Moreover, the relationships ofH-ZandH-βof the 38 stations were analyzed. The results indicated that the greater the absolute values ofZthe stronger the persistent nature. Meanwhile, for most of theHvalues were close to 0.5, the randomness of the future trends could not be ignored.

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Trends in Temperature and Precipitation in the Zhangweinan River Basin during the last 53 Years

Cited by 33 publications

References 1 publication

Recent Trends in Temperature and Precipitation in the Langat River Basin, Malaysia

Recent Trends in Temperature and Precipitation in the Langat River Basin, Malaysia

Precipitation Trends over Time Using Mann-Kendall and Spearman’s rho Tests in Swat River Basin, Pakistan

Analysis of Variation Trends in Precipitation in an Upstream Catchment of Huai River

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