SHAHIDIAN, S.; SERRALHEIRO, R.P.    SERRANO, J.. Influence of furrow length on the infiltration equation obtained by the two point method of Elliot & Walker. []. , 33, 1, pp.323-328. ISSN 0871-018X.

The Kostiakov infiltration equation can be established by the two point method of El­liot and Walker. Nevertheless, there are no indications as to how the two points should be selected. In this paper different pairs of points along a 220m long furrow are used to calculate the corresponding infiltration equation. The results indicate that the expo­nent of the equation increases with the length of the furrow, and with distance to the first point. The k of the equation behaves in the opposite direction, decreasing with an increase in the length of the furrow. It is recommended that the first measurement point should be located half way between the furrow inlet and the second measure­ment point.

: Elliot & Walker; Infiltration equation; Kostiakov; furrow irrigation.

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