DESIGN OF CONTROLLED DRAINAGE-SUBIRRIGATION (CD-SI) SYSTEM IN WATERLOGGED RICE FIELDS OF BAPATLA

N.V. GOWTHAM DEEKSHITHULU¹*, H.V. HEMA KUMAR², A. MANI³, CH. SUJANI RAO⁴, V. SRINIVASA RAO^5
1Dr NTR College of Agricultural Engineering, Bapatla, 522101, Acharya N.G. Ranga Agricultural University, Guntur, 522034, Andhra Pradesh, India
²Acharya N.G. Ranga Agricultural University, Guntur, 522034, Andhra Pradesh, India
³Acharya N.G. Ranga Agricultural University, Guntur, 522034, Andhra Pradesh, India
⁴Acharya N.G. Ranga Agricultural University, Guntur, 522034, Andhra Pradesh, India
⁵Acharya N.G. Ranga Agricultural University, Guntur, 522034, Andhra Pradesh, India
* Corresponding Author : gowtham.deekshithulu@gmail.com

Received : 08-06-2019     Accepted : 26-07-2019     Published : 30-07-2019
Volume : 11     Issue : 14       Pages : 8770 - 8775
Int J Agr Sci 11.14 (2019):8770-8775

Keywords : Controlled drainage, Subirrigation, Drain spacing, Hooghoudt’s and Moody equation
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Dr NTR College of Agricultural Engineering, Bapatla, 522101, Acharya N.G. Ranga Agricultural University, Guntur, 522034, Andhra Pradesh, India
Author Contribution : All author equally contributed

Chemical degradation of agricultural land sometime is a result of faulty irrigation water management besides being an inherent problem in several parts of the country. Such degradation may manifest in the formation of salinity, sodicity, acidity and toxic environment in the crop root zone. The result is loss is a reduction or loss of production. The water table could be maintained practically at desired level, during both monsoon and summer seasons using a unique drainage system i.e. Controlled drainage-Subirrigation system synonymously controlled and reversible drainage system or simply water table management. The scope of this paper is to discuss about the drain spacing related CD-SI system. Steady state Hooghoudt equation was used for the design of drainage spacing and similarly Moody and Ernst equation with convergence analysis was used for subirrigation mode spacing. The spacing arrived for controlled drainage mode was 27 m to that of subirrigation was 10.05 m respectively. Considering the feasibility of operation of both controlled drainage and subirrigation, the spacing of 10.05 m could be recommended for CD-SI system.

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