地形坡度下滴灌毛管铺设长度及灌水小区进口压力分析  

Analysis of Drip Pipeline Laying Length and Inlet Pressure under Condition of Terrain Slope

作　　者：许欣然 杨路华 陈凯 王子健 XU Xin-ran;YANG Lu-hua;CHEN Kai;WANG Zi-jian(College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin 300384, China;DAYU Water Saving(Tianjin)CO. Ltd., Tianjin 300021, China;Planning Department, The Second Design and Research Institute of Water Conservancy and Hydropower of Hebei Province, Shijiazhuang 050000, China)

机构地区：[1]天津农学院水利工程学院,天津300384 [2]大禹节水(天津)有限公司,天津300021 [3]河北省水利水电勘察设计二院规划处,石家庄050000

出　　处：《天津农学院学报》2017年第4期61-63,89,共4页Journal of Tianjin Agricultural University

基　　金：河北省科技厅项目"白洋淀流域农业面源污染物输出强度与水环境影响机理研究"(15963608D);天津市农委项目"基于水肥一体化的农业智慧灌溉技术应用与推广"(CK0123);天津农学院研究生创新培育项目"基于移动互联技术的农田智慧灌溉优化决策数学建模与应用"(2017YPY016)

摘　　要：地形坡度是影响滴灌系统灌水均匀度的重要因素。计算不同地形坡度条件下滴灌毛管铺设长度时,要分析地形坡度对铺设长度的影响。根据滴灌系统灌区实际布置,计算灌水小区水头损失,推导流量偏差率公式,进而计算灌水小区进口压力。结果表明:地形坡度对毛管铺设长度影响明显,地形坡度0.05时,逆坡毛管铺设长度减少一半,顺坡增加1倍。而采用灌水小区进口压力新的计算方法,灌区小区压力计算结果与实际更吻合。Topography is a main factor to the uniformity of drip irrigation.The laying length of drip line was calculated under different slope to analyze the relationship between slope and drip line laying length in comparison with that of the flat slope.Water head loss was calculated according to practical layout of drip irrigation district.The formula of flow deviation rate was derived,and the practical inlet pressure of the irrigation district was calculated.The results show that topography has a strong effect on drip line length,drip line length reduces to half while adversary slope is0.05,drip line length doubles while down slope is0.05.The pressure of irrigation district calculated by new formula corresponds to actual situation.

关 键 词：坡度 流量偏差率 毛管铺设长度 灌水小区 进口压力 

分 类 号：S275.6[农业科学—农业水土工程]