论文部分内容阅读
在坡度较大的地方进行喷灌时,随着地面坡度的增加,喷头朝上坡方向喷洒(简称仰射)时的射程锐减,并且点喷灌强度增大,对地面产生强烈冲刷。例如中原12Y喷头在平地上的射程为20.4m,而在坡度为30°的坡地上的仰射射程为9.9m,在坡度为40°的坡地上的仰射射程仅5.2m(竖管高度2m)。实际运用中,常采用扇形喷洒的办法解决这一问题。但采用扇形喷洒方式会缩小支管间距,增大固定式喷灌系统的单位面积投
When sprinkling irrigation at a steep slope, as the slope of the ground increases, the range of the sprinkler sprayed upwards (sharply ascending) sharply decreases, and the intensity of the point sprinkler irrigation increases intensively and scours the ground strongly. For example, the Central Plains 12Y sprinkler has a range of 20.4m on the ground and a 9.9m elevation on a slope of 30 ° and an elevation of only 5.2m on a slope of 40 ° (riser height 2m ). In practice, often used fan-shaped spray to solve this problem. But the use of fan-shaped spray will narrow the branch pipe spacing, increase the fixed sprinkler system unit area investment