浑水波涌灌溉的节水机理与效果

通过大田试验研究，表明在浑水波涌灌溉条件下，表土致密层的形成与发展是含沙水流中泥沙逐渐“挂淤”、“落淤”与“入渗滞留”等作用的结果。随着灌水周期的进展，表土致密层的糙率与入渗能力也随之减小，这就为以后各周期的灌溉水流创造了一个加速水流推进与提高减渗效果的新界面，从而达到节水与提高灌水质量的目的。从4个与浑水有关的节水率分析可见，浑水波涌灌溉的节水效果是泥沙与间歇共同作用的结果，其中泥沙作用是主要的。

Water-saving mechanism and the effects of muddy water surge-flow irrigation

The field test indicates that in surge-flow irrigation utilizing muddy water the formation and development of surface soil dense layer are the result of sedimentation and infiltration delay. The roughness and infiltration capacity will be gradually reduced as the irrigation cycle increases. It provides a new boundary to accelerate the flow of water and elevate the infiltration reduction effect for obtaining the advantage of water saving and water quality improvement.The analyses on the parameters related to water saving rate for muddy water irrigation show that the water saving effect is the composition of the sedimentation and intermittent action of surge irrigation and the former plays the major role.