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- Title
Trend Analysis of Annual and Seasonal Time Series over the Last 46 Years in Asan Watershed, Doon Valley Based on Gridded Data Set.
- Authors
Sharma, Ankita; Nikam, Bhaskar R.; Bagri, D. S.; Kumar, Deepak
- Abstract
The study is carried out with changing long-term trend and variation in one of the significant climatic element. The daily gridded rainfall data of spatial resolution 0.25°x 0.25°, for the last 46 years i.e. 1970-2015, has been processed for the Asan watershed located in Doon Valley, Uttarakhand. The non-parametric Mann-Kendall (MK) test together with Sen's Slope Estimator has been used for the determination of trend and slope magnitude in the watershed respectively. The gridded statistics of annual and seasonal precipitation trends have been studied here to achieve the objective. It has been observed that the magnitude of precipitation in annual and monsoonal time series are increased for all grids except for grid 6 and 8 which show a decreasing trend. The Post Monsoon time series shows a decreasing trend in all grids except for grid 6 which show positive whereas both the summer and winter rainfall show increasing trend except for grid 6. The Coefficient of variability shows variation for annual and seasonal rainfall suggesting overall insignificant changes in the area.
- Subjects
UTTARAKHAND (India); TREND analysis; TIME series analysis; WATERSHEDS; VALLEYS; DATABASES; RAINFALL
- Publication
Earth Science India, 2020, Vol 13, Issue 1, p8
- ISSN
0974-8350
- Publication type
Article
- DOI
10.31870/ESI.13.1.2020.2