Abstract
The zero-inertia model is widely used for simulating surface flow in irrigation systems. This model is accurate when inflow discharge is constant. However, simulation of irrigation systems with rapidly varied inflow discharge is needed due to the development of real time control irrigation technology. Hence, the objective of this study is to validate the zero-inertia model with rapidly varied inflow discharge. For this purpose, twenty-three border irrigation tests at a range of inflow changes on different field slopes and roughness coefficients were conducted. Then, the sensitivity analyses of bed slope, infiltration parameters, and roughness coefficient were examined. The results indicate that the zero-inertia model predictions are in good agreement with field data in both advance/recession times and flow depths. The infiltration parameters were the most sensitive input variable of the zero-inertia model. The input variables have a more considerable impact on the recession phase than the advance phase. Keywords: zero-inertia model, rapidly varied inflow, border irrigation, sensitivity analysis DOI: 10.25165/j.ijabe.20201302.5228 Citation: Liu K H, Jiao X Y, Li J, An Y H, Guo W H, Salahou M K, et al. Performance of a zero-inertia model for irrigation with rapidly varied inflow discharges. Int J Agric & Biol Eng, 2020; 13(2): 175–181.
Highlights
Surface irrigation is still the most common method for irrigating crops across the world
The zero-inertia model was solved using the finite difference method to verify the model with rapidly varied inflow discharge
The evaluation of the model in simulating the advance and recession phases revealed that the zero-inertia model is a good model for the surface irrigation system with rapidly varied inflow discharge
Summary
Surface irrigation is still the most common method for irrigating crops across the world. The full hydrodynamic model is recognized as the accurate description of the water flow in surface irrigation[1]. It is based on Saint–Venant long wave equations, which are two separate hyperbolic partial differential equations and include a mass conservation equation and a momentum equation. For these reasons, Strelkof and Katopodes[8] introduced the zero-inertia model based on the full hydrodynamic model. The volume balance model is rarely used, because it is hard to guarantee its accuracy
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Agricultural and Biological Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
