|Book Group Author:||NA|
The comparison between the efficiencies of continuous-flow irrigation (CFI) and increased-discharge irrigation (IDI) in blocked-end furrows using a mathematical model, as well as the measured distribution uniformities in field is presented in this article. The aim of this study is to determine if the IDI is an alternative method to the CFI in order to use water more efficiently. Infiltration and roughness parameters were calibrated with the water-advance curve of the CFI applied in furrows on different fields. These parameters satisfy the equation of continuity between the soil-applied and infiltrated volume with the best approximation. The parameters obtained through the CFI are maintained when the IDI is simulated. The efficiencies in theoretical results and the distribution uniformities (DU) from the field of the IDI, using equal or approximated discharges to the CFI, are higher than in the CFI. In agreement with the results of field in an only furrow, IDI increases DU 14.5% compared with CFI and, according to the theoretical results in three furrows, IDI can potentially save 18.2% of water compared with CFI. It is concluded that the IDI is an alternative method to the CFI when one uses length, slope, soil type, and roughness with similar characteristics to those used in this article.
|Pages:||375 - 380|
|Journal:||Applied Engineering in Agriculture|
furrow irrigation, irrigation systems, mathematical models,surface irrigation, water use efficiency, Soil Water Management(Irrigation and Drainage) (JJ800) (Revised June 2002) [formerly SoilWater Management], Mathematics and Statistics (ZZ100)