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Revista de Ciências Agrárias
Print version ISSN 0871-018X
Abstract
SHAHIDIAN, S.; SERRALHEIRO, R.P. and SERRANO, J.. Influence of furrow length on the infiltration equation obtained by the two point method of Elliot & Walker. Rev. de Ciências Agrárias [online]. 2010, vol.33, n.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.
Keywords : Elliot & Walker; Infiltration equation; Kostiakov; furrow irrigation.