ABSTRACT
Field tests were conducted at the Experimental Farm of Morada Nova Irrigation District (Ceara, Brazil), using three 110 m long furrows laid on a 0.3% slope. The analysis consisted in verifying the variations of a, k andf0 parameters of Kostiakov-Lewis infiltration along the irrigation season. Results showed that avalues increased from 0.1196 in the first irrigation to 0.4529 in the last one, except for the second irrigation. Parameter k decreased from 0.0156 mminmin the first irrigation, to 0.0112 m3 min-am-1 in the second, 0.0066 m3 min-am-1 in the third and 0.0024 m3 min-am-1 in the fourth; the values offovaried in the following manner: 0.000516, 0.000247, 0.000179 and 0.000170 m3 min-1.
Key words:
infiltration; furrow; Kostiakov-Lewis