Determinação da perda d'água por percolação e por Runoff em irrigação por sulco
Palabras clave:
irrigação sulco, eficiência irrigação, velocidade infiltração, perda percolação, vazão sulcoResumen
Mathematical equations for the computation of deep percolation and runoff are presented. The equations express the percentages of deep percolation and runoff as a function of the length of each sector, the exponent of the accumulated infiltration equation, the length of the furrow and the factor R (ratio of the time of application and time necessary for the flow to reach the end of the furrow). These equations yield good results as shown by comparison with the Bishop equation for two field data.
The greater the number of intervals in which the time of advance is divided, the more precise will be the calculation of percentage of percolation.
Citas
BERNARDO, S., RESENDE, M. & ARAUJO, J.J. Eficiência de irrigação em sulco com redução da vazão inicial. Rev. Ceres 24(133):261-277. 1977,
BISHOP, A.A. Relation of intake rate to length of run in surface irrigation. Transaction of American Society of Civil Engineers. 127:282-293. 1962.
CRIDDLE, W.D., DAVIS, S: & PAIR, C.H. Methods for evaluating irrigation systems. Washington. USDA - Soil Conservation Service, 1956. 24 p. (Agriculture handbook N.o 82).
FOK, Y. BISHOP A.A. Analysis of water advance in surface irrigation. Journal of the Irrigation and Drainage Division. 91(1):99-116. 1965.
ISRAELSEN, W.O., CRIDDLE, W.D., FUHRIMAN, D.K. & HANSEN, V.E. Water application efficiencies in irrigation. Logan, Utah Agricultural Experiment Station, 1944. 32 p. (Bol. n.o 311).
WILLARDSON, L.S. & BISHOP, A.A. Analysis of surface irrigation application efficiency. Journal of thé Irrigation and Drainage Division. 93(2):21-36.1967.
