Hydraulic Model of Closed end Furrow Irrigation

The study was conducted to develop a mathematical model to simulate the entire closed end furrow irrigation process, by modifying Singh and Fang (1989a) border model, by using shape curves of surface and subsurface water profiles. The field experiment was conducted on the sandy loam soil of Punjab Agricultural University, Ludhiana having a furrow length of 25 m to develop the data for water advance and recession of cropped and uncropped soil to be used for verification of models using four stream sizes viz., 0.72, 1.30, 2.02 and 2.60 l/s. The closed end furrow irrigation models were developed for advance, storage and recession phases of irrigation processes. The models for advance, storage and recession phases were verified with experimental data. The verification of the models using observed data showed that average relative error was less than 10 per cent for both cropped and uncropped soil conditions.