Saurabh Suman
1Masters Student, Department of Water Engineering and Management Central University of Jharkhand,
Brambe, Ranchi, Jharkhand, India, Email: saurabhsuman6991@gmail.com
Pratibha Warwade
Assistant Professor, Department of Water Engineering and Management Central University of Jharkhand,
Brambe, Ranchi, Jharkhand, India, Email: pratibhawarwade@gmail.com
Priti Kumari
Research Scholar, Department of Water Engineering and Management Central University of Jharkhand,
Brambe, Ranchi, Jharkhand, India, Email: priti.wem16@gmail.com
Article Information
Received: April 13, 2020
Revised: April 13, 2020
Accepted: April 25, 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 ofBihar 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 asignificant decrease in rainfall trend at the 10% significance level. The maximumdecrease in the magnitude of rainfall observed for the annual season was – 2.861mm/year followed by monsoon rainfall – 2.792 mm/year, and for winter rainfall- 0.085mm/year respectively. On the other hand, the maximum increase inrainfall observed for Post monsoon season was 0.225 mm/year and for summerseason it was 0.138mm/year during the study period. Spatial trend depicted theNalanda and Jamui has the greatest reduction of rainfall from the last 110 years.This study will be very helpful for policymakers, agriculturists, and framers totake a decision on water management, crop scheduling and patterns over thisregion.
Keywords: Trend analysis; MMK; Sens’s slope; Innovative Trend Method.