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| 005 | 20250422152757.0 | ||
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| 008 | 250411e2018 ph ||||| |||| 00| 0 eng d | ||
| 040 | _cCommission on Higher Education | ||
| 100 | 1 | _aMacarthur, Rosemia S. | |
| 245 | 0 | 0 |
_aBorder irrigation evaluation using power advance approach of the volume balance model _c / Rosemia S. Macarthur |
| 260 | 3 |
_aNueva Ecija _b : Central Luzon State University _c,2018. |
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_axiv, 66 leaves _c27 x 21cm. |
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| 500 | _aThesis (Master of Science in Agricultural Engineering) -- Central Luzon State University, June 2018. | ||
| 520 | 3 | _aThis study was conducted to evaluate the border irrigation method using power advance approach of the volume balance model. Specifically, it aimed to develop a computer program that computes the application efficiency, field losses and recommended stream size. Infiltration depth function and net depth of water applied established before irrigation using equation z = kt. Different infiltration depths functions were established using the formula, z = kt" a + ct. Net depth of water to be applied was also determine using the formula dn = (FC-CSM )As D. Iteration was done to determine the correct value of the subsurface shape factor, o, and slope of infiltration equation, r. The values of co, and r, aided in the prediction of advance distance, L along the border using the Equation Lqot/oyw+ cwk(t" + cwt/(r+l). The pump used during field experiment was two-inch gasoline self-priming pump. The derived equations from the field experiment were use in the development of computer program and written in Visual studio 2015, named Border Irrigation Support System (BISS). The result of the study showed that, the net depth of water to be applied was 5.68 cm, and the infiltration depth equations are z = 0.0087800 802 4 0.00213t, z 0.0087g0 50802 4 0.00360t and z= 0.00878/9 50802 4 0.00457t Equations to find the value of L, were established; L=0.06953t4/(0.16529 + 0.00703,0"0 02 4 0.00150tu.) for 0.17 m'/min pump discharge, L= 0.115794/(0.22446 + 0.006944,"" 0 00 4 0.00248tu.) for 0.34 m'/min pump discharge and L = 0.15422t4 / (0.26657 + 0.00680£," 0 0 2 for 0.80 m'/min pump discharge. The predicted advance distances were close to the observed advance distances with 0.03m to one-meter discrepancy. The result shows that, 0.80 m'/min pump discharge gives the highest application efficiency of 50.93% and 0.17 m'/min pump discharge give the highest deep percolation ratio and tail water r:atio with r.98% aqd ~.J6% respectively. In addition, 0.80 m'/min pump discharge give a high R value of 99.8%. BISS manual develop for easy operation and utilization of the computer program. | |
| 650 | 1 | 0 | _aBorder irrigation |
| 650 | 2 | 0 | _aWater balance (Hydrology) |
| 856 | 4 | 0 |
_uhttp://181.215.242.151/cgi-bin/koha/opac-retrieve-file.pl?id=1b4ac80dfdb164abd6ec5ce3fc5b8bf9 _zAbstract |
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_uhttp://181.215.242.151/cgi-bin/koha/opac-retrieve-file.pl?id=982aaf8f00b4e757e6a57f6a29e8f043 _zTable of Contents |
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