Long term rainfall analysis and crop planning for Jagdalpur region of Chhattisgarh

Abstract

The available daily rainfall data of 40 years (1980-2019) at SGCARS, Kumarawand, Jagdalpur, District Bastar was examined for long term rainfall averages on weekly basis for Kharif season and its temporal variability. Coefficient of variation of 24.14 per cent indicated that the season’s weekly rainfall was more or less stable over the years. The contribution to annual rainfall was 85.57 percent during Kharif season. Within the weeks, 30th week (23rd July to 29th July) was recorded as the highest rainfall contributing week with 8.16% followed by 26th week (25th June to 1st July) with 7.78% of total season’s weekly rainfall. Mean weekly precipitation amount and its assurance reaches the peak (>65 mm/week) during 25th SMW to 33rd SMW which is classified as heavy rainfall and again declined thereafter. In week 28th continuity of rainfall (