Application of HYDRUS-1D model for research on irrigation infiltration characteristics in arid oasis of northwest China

摘要: Irrigation is vital to agriculture and economic development, especially in arid areas. It essential study the characteristics of water infiltration with respect understanding balance information provide scientific theory for rationally utilizing resource. In this study, a HYDRUS-1D model was established simulate process soil after field experiment conducted Yaoba Oasis, measured content data were used calibrate validate model. Results showed that average correlation coefficients simulation results up 0.9, relative error root mean square 6.11% 0.015 cm3 cm−3, indicating HYDRUS has higher degree accuracy could be procedure Oasis. During 2015 season, consumption evaporation transpiration 429 386 mm, respectively, only 67% potential transpiration, which caused yield corn affected by stress. Contrarily, due high sand inappropriate irrigation regime, amount invalid leakage waste 581 mm, accounted 40.9% total infiltration. The different regimes found increasing times controlling single properly both save resource improve uptake amount.