| 地下滴灌灌水器出口正压试验研究 |
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| 引用本文： | 仵峰,李王成,范永申,李金山.地下滴灌灌水器出口正压试验研究[J].灌溉排水学报,2003,22(2):48-50,54. |
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| 作者姓名： | 仵峰 李王成 范永申 李金山 |
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| 作者单位： | 水利部,农田灌溉研究所,河南,新乡,453003 |
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| 基金项目： | 国家自然科学基金资助项目 (5 0 0 790 2 9) |
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| 摘 要： | 通过试验 ,研究了灌水器类型、流量、工作压力和土壤初始含水量对地下滴灌灌水器出口正压的影响规律。结果表明 :灌水器埋入土壤后 ,其出流由于受土壤等因素的限制 ,在灌水器出口处产生了一定的正压 ,该正压随着灌水历时的延长而增大。影响地埋灌水器出口正压的主要因素是灌水器的额定流量和土壤初始含水量
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| 关 键 词： | 地下滴灌 灌水器 出口正压 室内试验 |
| 文章编号： | 1000-646X(2003)02-0048-03 |
Experimental Study on Positive Pressure in Area Around Emitter in Subsurface Drip Irrigation |
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| WU Feng,LI Wang cheng,Fan Yong shen,Li Jin shan.Experimental Study on Positive Pressure in Area Around Emitter in Subsurface Drip Irrigation[J].Journal of Irrigation and Drainage,2003,22(2):48-50,54. |
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| Authors: | WU Feng LI Wang cheng Fan Yong shen Li Jin shan |
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| Abstract: | Several rectangle soil columns were used to investigate factors affected positive pressure in area around emitters in subsurface drip irrigation (SDI). Factors considered included types of emitter, discharge rate, work pressure and initial soil water content. Experimental results showed that positive pressure was formed around emitters due to soil limit to water movement. The positive pressure increased with irrigation development and will reach its constant maximum value some time late. The main factors affected the constant positive pressure value are emitter's discharge rate and initial soil water content. |
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| Keywords: | subsurface drip irrigation emitter positive pressure laboratory experiment |
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