Vol. 10, Issue 10 (2021)

Author(s):
Ajit Singh, AK Singh, Viniti Nagar and SC Bhan

Abstract:
It is quite evident from the data analyzed over last 30 years (1986-2015) that annual rainfall of Eastern U.P gradually declined over the normal 1000 mm. Seasonal rainfall variability (mm) of Eastern U.P have been presented and depicted S-W monsoon, Post monsoon, winter season per monsoon season. S-W monsoon and Post monsoon rainfall of Eastern U.P declined over the normal in recent years. Rainfall variability during different seasons of Eastern U.P has been presented. It is obvious from the data that rainfall occurred during winter season, summer season and SW monsoon periods were decreased while during post monsoon season rainfall was slightly increased by + 0.3% in the recent years to come. While trend of rainfall during winter and summer seasons found increased over the normal in recent years to come. The characteristics of rainfall of Eastern U.P. i.e. onset and withdrawal of monsoon from 1986 to 2015 revealed that shift of onset of monsoon in all the zones from 4 to 6 days toward rainy season consequently length of rainy season also shift on an average 5 to 6 days early. Withdrawal of SW monsoon in all the zones in recent years was found almost same i.e 24-26 September. Data analysis over past 30 years quite reveal that intensity of rainfall during monthly basis and whole S-W monsoon period were decreased in recent years.