Spatial and Temporal Trend Analysis of Rainfall Distribution in Nambiyar Watershed, Tamil Nadu
Year: 2021
Type: article
Abstract: This study is an attempt to comprehend the spatial and temporal trend of rainfall distribution in the Nambiyar watershed. The daily rainfall data was processed for the period from 1988 to 2018 to map the spatial distribution and analyse the temporal trend of rainfall. The results reveals that mean annual rainfall received in the watershed is 1026.81 mm. Statistical techniques like Mann- Kendall test and Sen’s Slope estimator were used to analyse presence of trend and correlation of variables. Among four seasons northeast monsoon contributes around 47 per cent (482.57 mm) of the total rainfall. The results brought out the fact that annual rainfall of the watershed does not exhibit any significant trend at α=0.05 or 95% of confidence level. Agricultural and allied activities which requires adequate irrigation is determined by the rainfall received in this watershed. Hence this study brings out the spatial and temporal pattern of rainfall distribution in Nambiyar watershed. Keywords: Rainfall trend, GIS, Sen's slope, Mann-Kendall test
Source: Geo Eye
Authors: R S Libina, R Jegankumar, K Prakash, D Venkita Surya, S P Dhanabalan, M A Arya
Institution: Bharathidasan University
Language: English
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4405116546