RAINFALL VARIABILITY OVER SOUTHERN BIHAR, INDIA release_6gebwyh2jjcobpt44j53pnkyrq

by Saurabh Suman, Pratibha Warwade, Priti Kumari

Published in Journal of Water Engineering and Management by Journal of Water Engineering and Management.

2020  

Abstract

In the present study Mann-Kendall (MK)/Modified Mann-Kendall (MMK) test, and Sen's slope test were used to determine the trend over the Southern part of Bihar at seasonal and annual time scales for 11 stations using 110 years data (1901-2010). In MMK test all stations in annual and monsoon season showed a significant decrease in rainfall trend at the 10% significance level. The maximum decrease in the magnitude of rainfall observed for the annual season was - 2.861 mm/year followed by monsoon rainfall - 2.792 mm/year, and for winter rainfall - 0.085mm/year respectively. On the other hand, the maximum increase in rainfall observed for Post monsoon season was 0.225 mm/year and for summer season it was 0.138mm/year during the study period. Spatial trend depicted the Nalanda and Jamui has the greatest reduction of rainfall from the last 110 years. This study will be very helpful for policymakers, agriculturists, and framers to take a decision on water management, crop scheduling and patterns over this region.
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