PYTHON-BASED RAINFALL ANALYSIS FOR INVESTIGATING SPATIAL VARIATION IN THE ONSET AND WITHDRAWAL OF MONSOON

K.M. KOKATE¹*, G.U. SATPUTE², S.M. APTURKAR^3
1Department of Soil & Water Conservation Engineering, Shramshakti College of Agricultural Engineering & Technology, Mahatma Phule Krishi Vidyapeeth, Rahuri, 413722, Maharashtra, India
²Department of Soil & Water Conservation Engineering, Dr Panjabrao Deshmukh Krishi Vidyapeeth, Krishi Nagar, 444104, Maharashtra, Indi
³Maharashtra Remote Sensing Application Centre, Ambazari, Nagpur, 440011, Maharashtra, India
* Corresponding Author : kirankokate30@gmail.com

Received : 04-11-2023     Accepted : 28-12-2023     Published : 30-12-2023
Volume : 15     Issue : 12       Pages : 12799 - 12803
Int J Agr Sci 15.12 (2023):12799-12803

Keywords : OEM, Withdrawal, Spatial variation, Critical dry spells, Data analysis
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Dr Panjabrao Deshmukh Krishi Vidyapeeth, Krishi Nagar, 444104, Maharashtra, India. Author also thankful to Maharashtra Remote Sensing Applications Centre, Planning Department, Govt. of Maharashtra, Nagpur, 440011, India
Author Contribution : All authors equally contributed

The knowledge of onset of effective monsoon (OEM), its withdrawal and distribution of seasonal rainfall during monsoon month are essential for crop planning and management of rainfed farming. Daily rainfall data for the period 1998 to 2017 were analyzed for different talukas of Yavatmal district in Vidharbha region of Maharashtra state according to Ashok Raj (1979) for the study of OEM, withdrawal of monsoon and spatial variation maps for both parameters were developed. The average monsoon seasonal rainfall in different taluka stations varied from 556.75 mm to 890.64 mm with coefficient of variation of 25 to 49 percent. The mean dates of onset and withdrawal of effective monsoon varied from 18?? to 29?? June and 17?? September to 4?? October respectively at different taluka places in Yavatmal district. The average onset dates of the effective monsoon differ between early and delayed onset years, ranging from June 6?? to June 14?? for early onset years and from June 28?? to July 14?? for delayed onset years. Average date of withdrawal of monsoon during early and delayed withdrawal years varied from 31?? August to 18?? September and 9?? to 19?? October respectively. Spatial variation maps for mean dates of onset and withdrawal of effective monsoon in Yavatmal district were prepared which can be used for crop planning of the region. The mean date of starting of different category critical dry spells (CDS) varied in different monsoon months from 19?? to 28?? June, 13?? to 24?? July, 12?? to 20?? August and 6?? to 19?? September at different taluka places in Yavatmal district

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