Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

DEVELOPING AN EQUATION FOR ESTIMATING INFILTRATION RATE THROUGH SOIL USING SCALING METHODS OF FURROW IRRIGATION (Pages : 11 - 17)

Design, evaluation and simulation of surface irrigation systems depend on knowledge about soil infiltration characteristics and water movement in field. Management of surface irrigation and especially furrow irrigation is costly, time-consuming and complicated because of spatial and temporal variability of infiltration. Thus, infiltration parameters for different inflow discharges, furrow geometry and soil water content, are variable in furrow irrigation. Consequently, it is difficult to present a general equation for infiltration. Scaling is one of suitable methods to obtain a general relationship for infiltration. In this study, an appropriate equation achieved for scaling the infiltration components, using dimensional analysis and 12 distinctive furrow data. The superiorities of suggested equation over available equations in the literature are requiring less data and also easier calculation method. Required parameters comprising inflow discharge, flow depth in furrow, application time and advance time. Results demonstrated that applying scale factor caused dissimilar infiltration curves to merge and produce one curve. The values of R2 and RMSE for suggested equation are 0.968 and 0.066, respectively.Download