摘要
我国北方渠灌区多以多泥沙河流为水源,管道淤堵问题是影响管道输水灌溉技术在渠灌区推广应用的制约因素之一。而解决浑水管道泥沙淤堵问题的关键在于其临界不淤流速的确定。根据我国浑水渠灌区泥沙特点和运行实际,以泥沙运动力学为理论基础,利用管道输水试验系统,对不同含沙量下的临界不淤流速进行了系统试验研究,得出临界不淤流速经验公式,为浑水渠灌区管道输水系统防淤堵提供了理论依据。
Multi-sediment river was regarded as source of water in northern channel irrigation area. Which irrigation technique of water delivery in pipeline being extended and applied is restricted because of sediment depositing in pipeline. Solving sediment depositing in pipeline key of problem lied in determining non-depositing critical velocity of muddy water delivery in pipeline system. Non-depositing critical velocity was experimental studied under different silt content according to muddy water channel irrigation area sediment characteristic and operation reality, founding on sediment motion mechanics, using water delivery in pipeline system. The empirical formula of non-depositing critical velocity was drawn and it provided the basic theoretic reference to prevent pipeline silting and choking in channel irrigation area.
出处
《灌溉排水学报》
CSCD
北大核心
2004年第6期34-36,40,共4页
Journal of Irrigation and Drainage
基金
国家"863"计划资助项目(2001AA242071)
