Comparison of Different Analyzing Techniques in Identifying Rainfall Trends for Colombo, Sri Lanka
Joint Authors
Rathnayake, Upaka
Perera, Anushka
Ranasinghe, Thilini
Gunathilake, Miyuru
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-09-01
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Identifying rainfall trends in highly urbanized area is extremely important for various planning and implementation activities, including designing, maintaining and controlling of water distribution networks and sewer networks and mitigating flood damages.
However, different available methods in trend analysis may produce comparable and contrasting results.
Therefore, this paper presents an attempt in comparing some of the trend analysis methods using one of the highly urbanized areas in Sri Lanka, Colombo.
Recorded rainfall data for 10 gauging stations for 30 years were tested using the MannKendall test, Sen’s slope estimator, Spearman’s rho test, and innovative graphical method.
Results showcased comparable findings among three trend identification methods.
Even though the graphical method is easier, it is advised to use it with a proper statistical method due to its identification difficulties when the data scatter has some outliers.
Nevertheless, it was found herein that Colombo is under a downward rainfall trend in the month of July where the area receives its major rainfall events.
In addition, the area has several upward rainfall trends over the minor seasons and in the annual scale.
Therefore, the water management activities in the area have to be revisited for a sustainable use of water resources.
American Psychological Association (APA)
Perera, Anushka& Ranasinghe, Thilini& Gunathilake, Miyuru& Rathnayake, Upaka. 2020. Comparison of Different Analyzing Techniques in Identifying Rainfall Trends for Colombo, Sri Lanka. Advances in Meteorology،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1127122
Modern Language Association (MLA)
Perera, Anushka…[et al.]. Comparison of Different Analyzing Techniques in Identifying Rainfall Trends for Colombo, Sri Lanka. Advances in Meteorology No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1127122
American Medical Association (AMA)
Perera, Anushka& Ranasinghe, Thilini& Gunathilake, Miyuru& Rathnayake, Upaka. Comparison of Different Analyzing Techniques in Identifying Rainfall Trends for Colombo, Sri Lanka. Advances in Meteorology. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1127122
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1127122