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华北地区喷灌蒸发损失田间测试研究

作  者:
徐红;龚时宏;李琳
单  位:
中国水利水电科学研究院
关键词:
喷灌;摇臂式喷头;蒸发损失;田间测试
摘  要:
以ZY-1(5.5×3.1mm)、ZY-2(7.0×3.1mm)摇臂式喷头为研究对象,采用承雨筒法开展喷灌蒸发损失的田间测试研究,利用喷洒水滴运动模型、水滴直径分布模型以及水滴蒸发模型模拟出喷灌系统在不同气象条件下的蒸发损失,并将模拟值与田间实测值进行了比对,结果表明ZY-1(5.5×3.1mm)摇臂式喷头组合喷灌条件下蒸发损失变化范围为0.95%~17.43%,主要集中在5%~10%。ZY-2(7.0×3.1mm)摇臂式喷头组合喷灌条件下蒸发损失变化范围为0.8%~14.28%,主要集中在4%~10%。ZY-1(5.5×3.1mm)、ZY-2(7.0×3.1mm)摇臂式喷头组合喷灌气象条件下蒸发量的实测值与模拟值随主要气象因子的变化趋势进行比对得出,两者随主要气象因子的变化趋势一致,即蒸发量随空气温度的升高、风速的增大而增大,随相对湿度的增大而减小。
译  名:
Field Test of Sprinkler Irrigation Evaporation in North China
作  者:
XU Hong;GONG Shi-hong;LI Lin;China Institute of Water Resource and Hydropower Research;
关键词:
sprinkler irrigation;;ZY impact driven sprinkler;;evaporation;;field test
摘  要:
In this paper,the ZY-1and ZY-2style impact driven sprinkler are taken as studying objects and the rain gauge method is adopted to carry out the field test of the sprinkler irrigation evaporation.Moreover,the spraying water drop motion model,the water drop diameter distribution model and the water drop evaporation model are used to simulate the evaporation loss of sprinkler irrigation under different meteorological condition and the simulation result is compared with the test result.The results show that the change range of evaporation loss under ZY-1(5.5×3.1mm)style combined sprinkler irrigation from 0.95%to 17.43%,mainly concentrated at 5%to 10%.While the one under ZY-2(7.0×3.1mm)combined sprinkler irrigation is from 0.8%to 14.28%,mainly concentrated at 4%to 10%.Comparing the simulation and test results of evaporation under different meteorological factors shows that the evaporation increases with the increase of air temperature and wind speed,and decreases with the increase of the relative air humidity.

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