| Water is redistributed when going through crop canopy during sprinkler irrigation.Most of irrigation water reaches soil surface by stemflow and throughfall.Percentages of stemflow and throughfall in total water applied are affected by crop species,canopy characteristics,plant density,sprinkler irrigation system,field topography and microclimate.A coefficient of soil water availability and uniformity of sprinkler irrigation was proposed to evaluate water redistribution in a sprinkler irrigation-crop system,where stem flow rate and water distribution coefficient are considered simultaneously.The coefficient could comprehensively show soil water availability when crops are irrigated by sprinkler irrigation systems. |