【摘要】 根据水流水面线为幂函数曲线假定用满宁水流公式,推求了水流在畦田推进过程的表达式。根据水量平衡原理,建立了利用水流推进过程有关水力因素确定土壤入渗参数和田面平均糙率方法。同时,利用实验资料对所提出的方法进行了检验,结果表明该法所推求的入渗参数与利用推进和消退过程推求的参数相一致。更多还原

【Abstract】 Based on the assumption that the flow surface is an exponential curve,the Manning formula is applied to deduce the equation expressing the advance process of the irrigation water flow in ditches.According to the principle of water volume balance the method for determining the infiltration parameter and Manning roughness using the hydraulic factors in the advance of irrigation water are established.The validity of the proposed method is verified by experimental data.更多还原