膜孔畦灌水流推进过程试验及数值模拟研究

利用膜孔畦灌田间水流推进实测资料,根据膜孔灌室内点源入渗模型验证了大田膜孔畦灌水流推进距离与时间呈乘幂函数的关系,并推求了不同开孔率情况下的膜孔灌点源入渗参数。假定不同的田间糙率基于SRFR软件对膜孔畦灌水流推进进行数值模拟,使模拟水流推进时间与真实情况达到最佳匹配,来确定田间的糙率,为膜孔畦灌技术要素设计及田间试验提供了参考。

Film Hole Border Irrigation Water Flow Advance Test and Numerical Simulation

This paper verifies that there is a power function relationship between water advance distance and time under field film hole border irrigation and deduce the point source infiltration parameters with different percentage of aperture porosity,using film hole border irrigation water flow advance data measured in the field,according to the interior point source infiltration model with film hole irrigation.The water flow advance process is simulated by SRFR software with the assumption of different field roughness.What's more,the field of roughness is determined on the basis of the optimal match between the time and the real situation.The results can provide technical supports for the design and field test of film hole border irrigation.