Investigation of trends and its magnitude by non-parameteric Mann-Kendall and Sen's slope methods
by P. Jagadeesh; Suyash Agrawal
International Journal of Hydrology Science and Technology (IJHST), Vol. 5, No. 1, 2015

Abstract: Present study aims to determine trends and inconsistency in the magnitude of annual and seasonal rainfall using Mann-Kendall and Sen's slope non-parametric analyses. The rainfall data used in this study includes 35 years of monthly rainfall at eight rain gauge stations of Bharathapuzha catchment, Kerala. Mann Kendall analysis revealed that, out of eight stations only 25% of stations showed a positive trend in annual and south-west monsoon rainfall. And all stations showed a positive trend for pre-monsoon, while only 37.5% of stations showed a positive trend in north-east monsoon. From Sen's analysis, it was observed a decrement of 32.67 mm/yr and 23.87 mm/yr in annual and south-west monsoon in Eland. A decrement of 15.79 mm/yr was observed in Pazhaynur Seed for south-west season, while 5 mm/yr for annual monsoon. At Pokkunni an increment of 16.30 mm/yr was observed for annual and 9.33 mm/yr increment for south-west monsoon. A decrement of 6.55 mm/yr and 1.88 mm/yr was observed respectively at Walayar for annual and southwest monsoon. An overall trend analyses reflect increasing trend in the east and more decreasing trend in the south and west compared to north of the catchment.

Online publication date: Thu, 07-May-2015

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Hydrology Science and Technology (IJHST):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com