| 均匀坡度下滴灌系统流量偏差率的计算方法 |
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| 引用本文： | 张林,吴普特,牛文全,范兴科.均匀坡度下滴灌系统流量偏差率的计算方法[J].农业工程学报,2007,23(8):40-44. |
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| 作者姓名： | 张林 吴普特 牛文全 范兴科 |
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| 作者单位： | 西北农林科技大学水利与建筑工程学院,杨凌,712100;国家节水灌溉杨凌工程技术研究中心,杨凌,712100 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 为了精确地模拟滴灌系统流量偏差率，该文从水力学的基本原理出发，通过对不同坡度毛管水头损失变化规律的分析，确定了不同坡度条件下滴灌系统最大、最小工作压力滴头的分布情况，在此基础上推导出了考虑地面坡度及水力偏差的单毛管流量偏差率计算公式，进而推导了小区流量偏差率的计算方法。与规范算法相比，该文的计算结果更接近于实际情况，为准确设计滴灌系统工程提供技术指导，使滴灌系统实际运行指标与系统设计指标基本保持一致。
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| 关 键 词： | 均匀坡度 滴灌系统 流量偏差率 计算方法 |
| 文章编号： | 1002-6819（2007）8-0040-05 |
| 收稿时间： | 2006/8/17 0:00:00 |
| 修稿时间： | 3/8/2007 12:00:00 AM |
Method for calculating flow deviation in drip irrigation system under uniform slope |
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| Zhang Lin,Wu Pute,Niu Wenquan and Fan Xingke.Method for calculating flow deviation in drip irrigation system under uniform slope[J].Transactions of the Chinese Society of Agricultural Engineering,2007,23(8):40-44. |
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| Authors: | Zhang Lin Wu Pute Niu Wenquan and Fan Xingke |
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| Institution: | College of Water Resource and Architectural Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; National Engineering Research Center for Water Saving Irrigation at Yangling, Yangling 712100, China;College of Water Resource and Architectural Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; National Engineering Research Center for Water Saving Irrigation at Yangling, Yangling 712100, China;College of Water Resource and Architectural Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; National Engineering Research Center for Water Saving Irrigation at Yangling, Yangling 712100, China;College of Water Resource and Architectural Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China; National Engineering Research Center for Water Saving Irrigation at Yangling, Yangling 712100, China |
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| Abstract: | In order to imitate accurately flow deviation in drip irrigation system, based on the hydraulic theory, the variation regulation of the headloss of the lateral under different slopes was analyzed, and the dripper distribution of maximal and minimal working pressure under different slopes were determined. Taking into account of hydraulic variation and terrain slope, a formula to compute the flow deviation of single lateral and the method for calculating flow deviation in blocks were deduced. Compared with calculation method in technical standard of micro-irrigation projects, calculation result is more consistent with actual situation. It can provide the more accurate technological guidance for designers, and makes that the practical operational targets keep pace with the designed target in drip irrigation system. |
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| Keywords: | uniform slope drip irrigation system flow deviation calculation method |
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