Non-parametric characterization of long-term rainfall time series

Tiwari, Harinarayan; Pandey, Brij Kishor

doi:10.1007/s00703-018-0592-7

Cited by 20 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Given the limited sample size ( n = 10) in this study, Mann–Kendall (MK) tests are used to examine the temporal changes of the waste diversion rates from 1998 to 2016. MK test is a non-parametric statistical tool that is used to identify monotonic trends in time-series data (Chowdhury et al 2017 ; Tiwari and Pandey 2019 ) and is adopted in the current study to analyze the recycling behavior of different WMSs. Unlike linear regression, the MK test can handle irregular data intervals regardless of data normality distribution (Fu and Weng 2015 ; Wang et al 2016a ), and a normal distribution of the data is not necessary.…”

Section: Methodsmentioning

confidence: 99%

Ranking Canadian waste management system efficiencies using three waste performance indicators

Mensah

Karimi

et al. 2023

Environ Sci Pollut Res

View full text Add to dashboard Cite

Three waste management system (WMS) efficiency indicators are adopted to systematically assess WMS efficiency in Canada from 1998 to 2016. The study objectives are to examine the temporal changes in waste diversion activities and rank the performance of the jurisdictions using a qualitative analytical framework. Increasing Waste Management Output Index (WMOI) trends were identified in all jurisdictions, and more government subsidiaries and incentive packages are recommended. With the exception of Nova Scotia, statistically significant decreasing diversion gross domestic product (DGDP) ratio trends are observed. It appears that the increases in GDP from Sector 562 were not contributing to waste diversion. On average, Canada spent about $225/tonne of waste handled during the study period. Current spending per tonne handled (CuPT) trends are decreasing, with S ranging from + 5.15 to + 7.67. It appears that WMSs in Saskatchewan and Alberta are more efficient. The results suggest that the use of diversion rate alone to evaluate WMS may be misleading. The findings help the waste community to better understand the trade-offs between various waste management alternatives. The proposed qualitative framework utilizing comparative rankings is applicable elsewhere and can be a useful decision support tool for policy-makers.

show abstract

Section: Methodsmentioning

confidence: 99%

Ranking Canadian waste management system efficiencies using three waste performance indicators

Mensah

Karimi

et al. 2023

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…One advantage of the Mann-Kendall is that as a non-parametric test, it does not require the series to be normally distributed or linear. The Mann-Kendall test has been proven for its suitability to detect increasing and decreasing trends in climate and environmental data (Alemu & Dioha, 2020) and dependable test for identifying trends in time series rainfall data sets (Bari et al, 2016;Bora et al, 2022;Sharma and Saha, 2017;Tiwari and Pandey, 2018).…”

Section: Methods For Assessing Rainfall Trends and Variabilitymentioning

confidence: 99%

Assessment of the relations between crop yield variability and the onset and intensity of the West African Monsoon

Joseph

Akinseye

Worou³

et al. 2023

Agricultural and Forest Meteorology

View full text Add to dashboard Cite

“…The parametric tests such as linear regression and Prais-Winsten regression are the elementary statistical techniques. However, the non-parametric tests are widely accepted for trend analysis because of having several advantages over the parametric tests (Kumar et al 2019;Tiwari and Pandey 2019). Unlike parametric tests, they have lesser assumptions.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal assessment of precipitation variability, seasonality, and extreme characteristics over a Himalayan catchment

Swain

Mishra

Pandey

et al. 2021

Theor Appl Climatol

View full text Add to dashboard Cite

This paper presents a detailed spatiotemporal analysis of the rainfall variability, seasonality, and the extreme characteristics of Tehri catchment located in the lower Himalayan region in India. To this end, the daily rainfall data is extracted from 22 grids for 117 years from the high-resolution (0.25° × 0.25°) gridded observation dataset. Monthly rainfall distribution is evaluated using precipitation concentration index (PCI) and seasonality index. The extreme rainfall indices, viz., maximum 1-day rainfall (Rx1Day), maximum 5-day rainfall (Rx5Day), number of rainy days (NxRainy), total precipitation in rainy days (PRCPTOT), number of heavy rainfall events (NxHeavy), maximum consecutive wet days (CWD), and simple daily intensity index (SDII) are computed for each year considering the thresholds suggested by India Meteorological Department (IMD). The Mann-Whitney-Pettitt test when applied to the annual rainfall time series revealed the year 1958 to be the statistically significant change point. The non-parametric modified Mann-Kendall and Sen's slope tests are employed to detect the trend in monthly, seasonal, annual rainfall time series, extreme precipitation indices, and seasonality indices for both the pre-and post-1958 periods. The annual rainfall over the grids mostly possessed higher negative trends during 1959-2017 than those during 1901-1958, mainly due to the decreasing trends in post-monsoon and winter seasons. Compared to 1901-1958, NxRainy, CWD, and PRCPTOT exhibited a remarkable decreasing trend whereas NxHeavy, Rx1Day, Rx5Day, and SDII exhibited higher positive trends during 1959-2017, indicating intensification of precipitation. The precipitation over the catchment has been more concentrated in the latter epochs of monsoon season and annual rainfall and it is also evident from the increasing trends of the seasonality indices. There is no such study dealing comprehensively with identification of extreme characteristics, seasonality/concentration characteristics, and various categorical trends of precipitation in a Himalayan region reported in literature. This study will be useful in understanding the decreasing trend of precipitation volume coupled with increasing intensity and concentration and it is quite critical for a Himalayan catchment.

show abstract

Non-parametric characterization of long-term rainfall time series

Cited by 20 publications

References 21 publications

Ranking Canadian waste management system efficiencies using three waste performance indicators

Ranking Canadian waste management system efficiencies using three waste performance indicators

Assessment of the relations between crop yield variability and the onset and intensity of the West African Monsoon

Spatiotemporal assessment of precipitation variability, seasonality, and extreme characteristics over a Himalayan catchment

Contact Info

Product

Resources

About