Calculation and verification of infiltration parameters and roughness in furrow irrigation

To determine soil water infiltration parameter under the condition of furrow irrigation, on the base of the volume balance approach, the indoor furrow experiment platform was used to estimate and verify the infiltration amount, the Kostiakov parameter and the modified one. Moreover, under the conditions of two different roughness and drainage boundaries, the measurement data of the irrigation advance stages and the latter stage, such as inflow, flow advance function, water depth and outflow, was applied to establish the calculation model. Additionally, the infiltration parameter determined by calculation was substituted into SRFR to verify water advance process and the water depth hydrographs of different measuring points, and simulated value had a good fit to the measured. Finally, the results show that soil water infiltration parameter based on the volume balance approach can be used to show the rule of soil water infiltration and guide the real time control of furrow irrigation.