Determination of surface drainage coefficient - a case study of Doimukh (Arunachal Pradesh), India

Authors

  • PARMENDRA PRASAD DABRAL Department of Agricultural Engineering,NERIST,Nirjuli-791109, Arunachal Pradesh, India
  • Amardeep Kumar
  • Gymar Tana

Keywords:

1 day to 7 consecutive days annual maximum rainfall, Probability distribution functions, Basic infiltration rate, Drainage coefficient

Abstract

In this study, 1 day to 7 consecutive days annual maximum rainfall was predicted at various return periods using probability distribution functions for Doimukh (Arunachal Pradesh), India. Basic infiltration (Ib) rate value was estimated 10 mm hr-1 for the agricultural field having sandy soil. The drainage coefficient was estimated for 5, 10, 20 and 25 years R.I. by subtracting basic infiltration rate from estimated consecutive day rainfall.  For the study area, the maximum value of drainage coefficient at 25 years recurrence interval varied from 41.37 mm day-1 to 304.23 mm day-1 for 2 to 7days consecutive rainfall. The minimum value of drainage coefficient at 5 years interval varied from 0 to 212.30 mm day-1 for 2 to7days consecutive rainfall. Study concluded that sandy soil of Doimukh (Arunachal Pradesh) having basic infiltration rate 10 mm hr-1 had to be provided with agricultural drainage for its major crops grown in the area.

Author Biography

PARMENDRA PRASAD DABRAL, Department of Agricultural Engineering,NERIST,Nirjuli-791109, Arunachal Pradesh, India

Professor

Department of Agricultural Engineering,NERIST,Nirjuli-791109, Arunachal Pradesh, India

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Published

2016-12-14

Issue

Section

I-Land and Water Engineering