DefinePK

Abstract

Rainfall is the type natural process varies from place to place due to convective precipitation. In this study, rainfall data for the years 2001 to 2012 have been analyzed in terms of temporal and spatial characteristics in order to identify the change of rainfall trend and spatial distribution of annual rainfall over Sylhet region with a view to understand the pattern of rainfall trend (magnitude), by applying various numerical tools on the data obtained from 8 different climate stations. Map of rainfall trends was created by applying a geo-statistical interpolation technique to visualize the detected tendencies. The findings revealed that a significant positive increase of 2.16mm in rainfall was recorded in the entire Sylhet district within the period of 2001 to 2012. However, majority of the station revealed an upward trend, with Sulaghar, Lalakhal, Gobindogonj, Chattak, Sherupur, Sheola, Zakigonj, and Kanaighat stations showing significant trends of -103 mm, -17.8 mm,-38.61 mm and 152.381 mm, 4.625 mm, of -103 mm,-60.1429 mm,-15.6333 mm, and 11.51667 mm correspondingly. From this analysis high variability in rainfall in Sylhet region signifies an obvious indication of climate change.