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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (2): 291-294.

• 工程 机械 水利 装备 • 上一篇    下一篇

畦灌改水成数的控制误差及其对灌水质量的影响?

王维汉1,2,缴锡云1,朱艳1,李峰1   

  • 收稿日期:2009-06-03 修回日期:2009-11-23 出版日期:2010-01-20 发布日期:2010-01-20
  • 基金资助:

    国家自然科学基金资助项目“沟畦灌溉的稳健设计理论与试验研究”;“十一五”国家科技支撑计划项目“灌区田间节水改造技术集成模式研究”;948项目“引进国际先进水利科学技术计划”

Control Error of Inflow Cutoff and Its Effect on Border Irrigation Performance

  • Received:2009-06-03 Revised:2009-11-23 Online:2010-01-20 Published:2010-01-20

PDF (PC)

618

摘要：

【目的】改水成数是地面灌溉设计和管理的基本参数之一。为了更好地进行地面灌溉系统的设计和管理，统计了畦灌改水成数的控制误差，并分析了其对灌水质量的影响。【方法】根据实测的16条畦田不同改水成数的控制误差，采用经典统计学方法得到了其统计特征，并采用地面灌溉模拟模型SRFR评价了其对灌水质量的影响。【结果】结果表明，改水成数控制误差具有较强的变异性，改水成数对灌水均匀度的影响大于灌水效率。【结论】因此，在实际地面灌溉设计与管理中，改水成数的控制误差不可忽略。较大的单宽流量有助于减小改水成数的控制误差对灌水质量的影响。

关键词: 化学发光, 化学发光, 土壤, 有效氮

Abstract:

【Objective】 Inflow cutoff is one of the basic technical parameters in the design and management of surface irrigation system. The control error of inflow cutoff can affect the evaluation and management of surface irrigation system. In this paper, the control error and its effect on border irrigation performance were studied. 【Method】According to the control error of different inflow cutoff under 16 border strips, the statistical characteristics were acquired with the classical statistical theory, and the effect of control error on irrigation performance was simulated by SRFR model.【Result】Results indicate that the variation intensity of control error of inflow cutoff is strong, the effect of inflow cutoff on distribution uniformity is visible than application efficiency.【Conclusion】Therefore the control error of inflow cutoff is not ignored in the actual design and management of surface irrigation. Bigger inflow rate can reduce the effect of control error of inflow cutoff on irrigation performance.