摘要
低压管道输水灌溉技术灌水均匀性问题是其在推广过程的一大障碍。用常规方法计算出的结果往往管径较小,水泵扬程较高,放水口出流不均匀。针对常规设计方法中存在的首末放水口工作水头差大,放水口工作水头不合理,放水口实际出流量与设计流量不匹配等问题提出了相应的对策,同时提出了对常规设计结果进行校核和调整的方法,并将其应用于江苏省黄海农场中德示范区的低压管灌系统设计中。结果表明经过校核和调整,可以提高系统灌水均匀性,同时还能进一步提高设计的精度和可靠度。
The problem of irrigation uniformity is one of obstructions in the popularization of low-pressure pipe irrigation. The pumping head is usually too large when using the traditional design method,which results in the phenomenon that the discharge of outlets in the front of a branch pipe is much larger than that of outlets at the back. Strategies for the difference of operating head between the outlets of the same branch pipe and the appropriate operating head and suitable size of outlets are proposed. At the same time,the checking method for design results is proposed and applied in the design of low-pressure pipe irrigation project in Zhongde demonstration area of Huanghai State Farm in Jiangsu Province. The results show that the checking method can enhance the irrigation uniformity of low-pressure pipe irrigation and increase the accuracy and reliability of design results.
作者
蒋晓红
龚志浩
JIANG Xiao-hong;GONG Zhi-hao(School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou 225009, Jiangsu Province, Chin)
出处
《节水灌溉》
北大核心
2018年第5期93-96,共4页
Water Saving Irrigation
基金
江苏省水利科技项目(2016002)
江苏省水利科技项目(2016074)
关键词
低压管道输水灌溉
灌水均匀性
对策
校核
调整
low-pressure pipe irrigation
irrigation uniformity
strategy
check
adjust
