PRE-DRAINAGE INVESTIGATIONS OF WATERLOGGED RICE FIELDS IN BAPATLA REGION

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 : 30-06-2019     Accepted : 12-07-2019     Published : 15-07-2019
Volume : 11     Issue : 13       Pages : 8725 - 8732
Int J Agr Sci 11.13 (2019):8725-8732

Keywords : Waterlogging, Salinity, Hydraulic Conductivity, Drainable Porosity, RI and Dc
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 authors equally contributed

The excessive application of irrigation water combined with high rainfall led to rapid rise of water table, resulting into development of waterlogging and salinity in Krishna western delta farmer’s fields. To test and demonstrate the need for control of soil salinity and waterlogging, pre drainage investigations were carried out at one of the farmer’s field near Bapatla, Guntur district, Andhra Pradesh. The results of physical and chemical analysis of soil samples showed that the type of soil is alkali in nature with high content of ESP. The N, P, K values were found to be 130, 18, 760 kg ha-1 respectively. The texture of the soil is clay loam with hydraulic conductivity value of 0.709 m/day and drainable porosity of 2.98%. Rainfall data of ten years (2008-2017) was analyzed to determine expected rainfall of different durations for one to ten years recurrence interval (RI). The drainage coefficient (dc) was estimated as 2.96 mm/day for the design of drainage system in the study location.

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