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Bhartiya Krishi Anusandhan Patrika, volume 34 issue 2 (june 2019) : 83-91

Probability and Trend Analysis of Monthly Rainfall in Haryana

Mohit Nain, B.K. Hooda
1Department of Mathematics and Statistics, CCS Haryana Agriculture University, Hisar-125 004, India.

  • Submitted05-03-2019|

  • Accepted17-04-2019|

  • First Online 12-10-2019|

  • doi 10.18805/BKAP161

Cite article:- Nain Mohit, Hooda B.K. (2019). Probability and Trend Analysis of Monthly Rainfall in Haryana. Bhartiya Krishi Anusandhan Patrika. 34(2): 83-91. doi: 10.18805/BKAP161.

ABSTRACT

Study on rainfall pattern of a region over a number of years is very useful for crop planning and irrigations scheduling. The present study deals with the probability and trend analysis of monthly rainfall in selected rain gauge stations scattered over the entire state of Haryana.  Probabilities for drought, normal and abnormal events for monthly rainfall have been worked out using monthly rainfall data for 42 years (1970-2011), covering 27 rain gauge stations in the state of Haryana. Analysis indicated that drought months are more probable than normal months while normal months are more probable than abnormal months.  The monotonic trend direction and magnitude of change in rainfall over time have been examined using the Mann-Kendall test and Sen’s slope estimator tests. Using the Mann-Kendall test and Sen’s slope estimator, the significant decrease in annual rainfall was noticed at Ballabgarh and Thanesar, While in monsoon rainfall, a significant decrease was noticed at Thanesar and Narnaul. But Sirsa is the only district which shows a significant increase in annual and monsoon rainfall. In probability analysis the highest per cent of normal, draughts and abnormal months was observed for Ambala, Hassanpur and Dujana respectively.

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