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采用滤纸法测定。试验表明喷洒水裂散的程度不仅与喷头的工作压力、喷嘴直径有关,且与喷洒水射流的雷诺数有关。提出常用旋转式喷头喷洒水滴沿程分布特性,喷洒水滴以累计水量为60％～70％的上限水滴直径作为旋转式喷头喷洒水滴代表性直径。给出了砂土、砂壤土、壤土、壤粘土和粘土在不同喷水定额下的允许喷灌强度,供修改GBJ85-85参考。
Using filter paper method. Tests show that the degree of spray water splitting is not only related to the working pressure of the spray head, the nozzle diameter, but also to the Reynolds number of the sprayed water jet. The distribution characteristics of common droplet sprayer along the spray path are proposed. The diameter of the upper water droplet sprayed by the sprinkler is 60% ~ 70%. The allowable irrigation intensity of sand, sandy loam, loam, loam and clay under different water quotas is given for reference GBJ85-85.