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has been cited by the following article:

• TITLE: Variability and Trends of Daily Heavy Rainfall Events over Niger River Basin Development Authority Area in Nigeria

  AUTHORS: Joseph Sunday Babatolu, Rufus Temidayo Akinnubi, Akintade Taiwo Folagimi, Omosuyi Oluwayemisi Bukola

  KEYWORDS: Rainfall; Anomalies; River Niger Basin Development Authority Area

  JOURNAL NAME: American Journal of Climate Change, Vol.3 No.1, March 11, 2014

  ABSTRACT: Using 70 years of daily rainfall records in eight stations, an analysis of variability and trends of daily heavy rainfall events over Niger River Basin Development Authority Area was carried out by using Standardized Anomaly Index and Spearman Rank Correlation Coefficient. Significant temporal variability on interannual and decadal time-scales was observed in the frequency of heavy rainfall events and annual heavy rainfall amount. Both the annual heavy rainfall amount and frequency of heavy rainfall events demonstrated no pronounced temporal decreasing or increasing trend. However, more recent data records from 1981 onwards revealed an increasing trend. Thus, evidence of a temporal change is apparent in heavy rainfall events in the last three decades in sympathy with global warming.