Rainfall Irregularities, Trends and Variations in Tropical Semi-Arid River Catchment

Rainfall Irregularities, Trends and Variations in Tropical Semi-Arid River Catchment

Dau Abba Umar

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Rainfall Irregularities, Trends and Variations in Tropical Semi-Arid River Catchment

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Abstract

Irregularities in rainfall behaviour has been characteristically visible in semi-arid climate particularly in the tropics. Trends and variations have been used as proxies in detecting the presence of irregularities in climatic variables such as rainfall. Thirty six years of data obtained from Nigerian Meteorological Agency (NIMET) were used for the present study. Multivariate statistics such as ANOVA and Cluster Analysis were used for assessing variations between and within the data mean. However, Mann-Kendall trend test was applied for trend detection. The ANOVA results showed significant variation in rainfall [F (3, 140) = 67.012, P < .05], between the stations. The cluster analysis produces two classes for rainfall indicating that rainfall is less variable spatially. Mann-Kendall trend test result shows an insignificant annual increasing trend in rainfall. However, the monthly series showed varied trend results consisting of significantand insignificant increasing and decreasing trends.

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No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

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How to Cite This Article

Dau Abba Umar. 2018. \u201cRainfall Irregularities, Trends and Variations in Tropical Semi-Arid River Catchment\u201d. Global Journal of Human-Social Science - B: Geography, Environmental Science & Disaster Management GJHSS-B Volume 18 (GJHSS Volume 18 Issue B2): .

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GJHSS Volume 18 Issue B2
Pg. 15- 25

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Journal Specifications

Crossref Journal DOI 10.17406/GJHSS

Print ISSN 0975-587X

e-ISSN 2249-460X

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GJHSS-B Classification: FOR Code: 050299

Submission ReceivedDecember 8, 2017
Peer Review Double Blind
Handling Editor
Accepted December 31, 2017
Published January 15, 2018

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June 19, 2018

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Article Matrices

Total Score: 101

Country: Nigeria

Subject: Global Journal of Human-Social Science - B: Geography, Environmental Science & Disaster Management

Authors: Dau Abba Umar (PhD/Dr. count: 0)

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Publish Date: 2018 06, Tue

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