Rainfall Trend Analysis in Uma Oya Basin, Sri Lanka, and Future Water Scarcity Problems in Perspective of Climate Variability
Joint Authors
Khaniya, Bhabishya
Jayanayaka, Isuru
Jayasanka, Pradeep
Rathnayake, Upaka
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-05-08
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
The effect of climate variability on the rainfall pattern is canvassed on the Uma Oya river basin, Sri Lanka, consisting of 5 rainfall gauging stations.
The Uma Oya basin (720 km2) is given utmost precedence due to environmental concerns seen in the ongoing Uma Oya multipurpose development project (529 million USD worth) which is expected to divert water to the southeast dry zone of the country while adding 231 GWh/year electricity to the national grid.
The rainfall data for a period of 26 years (1992–2017) were analysed using Mann–Kendall’s test and Sen’s slope estimator test to identify the rainfall trends.
Both of these trend analysis test results depict only one negative trend for Hilpankandura Estate for the month of June; however, the seasonal trend analysis and annual trend analysis do not support this observation.
Nevertheless, Mann–Kendall’s test showed potential positive trends for the 3 rainfall gauging stations Kirklees Estate, Ledgerwatte Estate, and Welimada Group only in the 1st intermediate period (March-April), and this is well supported by the monthly trend analysis.
Other than these trends, the results do not show any significant negative trends in the Uma Oya catchment.
Therefore, the results vividly explain that there is no threat of water scarcity to the catchment area being resistant to changing global climate for the past 26 years.
American Psychological Association (APA)
Khaniya, Bhabishya& Jayanayaka, Isuru& Jayasanka, Pradeep& Rathnayake, Upaka. 2019. Rainfall Trend Analysis in Uma Oya Basin, Sri Lanka, and Future Water Scarcity Problems in Perspective of Climate Variability. Advances in Meteorology،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1118623
Modern Language Association (MLA)
Khaniya, Bhabishya…[et al.]. Rainfall Trend Analysis in Uma Oya Basin, Sri Lanka, and Future Water Scarcity Problems in Perspective of Climate Variability. Advances in Meteorology No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1118623
American Medical Association (AMA)
Khaniya, Bhabishya& Jayanayaka, Isuru& Jayasanka, Pradeep& Rathnayake, Upaka. Rainfall Trend Analysis in Uma Oya Basin, Sri Lanka, and Future Water Scarcity Problems in Perspective of Climate Variability. Advances in Meteorology. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1118623
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1118623