For purposes of evaluation of performance of furrow irrigation, this research verified the feasibility of the parabolic arc equation for calculating the wetted perimeter. The values of the wetted perimeter estimated by the proposed equation were evaluated by comparison with results obtained from others equations presented in the literature and with the field data. The results showed that the parabolic arc equation is feasible for calculating the wetted perimeter in furrow irrigation.
furrow irrigation; wetted perimeter; performance
