地下滴灌条件下湿润体特性的试验研究  

Experimental Research on Soil Wetting Front Infiltration of Subsurface Drip Irrigation

作　　者：王超[1] 李援农[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《中国农村水利水电》2011年第3期38-40,共3页China Rural Water and Hydropower

基　　金：国家支撑计划项目(2007BAD88B05);国家高技术研究计划("863"计划)项目(2006AA100213)

摘　　要：滴头流量与灌水量影响土壤湿润体的大小形状等特性,从而影响作物的生长生产。通过室内试验,研究了地下滴灌条件下不同滴头流量不同灌水量对湿润体特性的影响。结果表明:湿润锋运移与滴头流量的时间变化呈正相关;灌水量为5L时湿润体的横向和纵向尺寸达到50cm;湿润体含水率与滴头的距离具有良好的二次幂函数关系。这对于开展地下滴灌试验与设计具有一定的参考价值。The dripper discharge and irrigation quantity can affect the shape and size of soil wetted front,then the growth and production of crop can be affected.In this paper,dripper discharges and irrigation quantity affecting the soil wetted front is studied through subsurface drip irrigation laboratory experiments.The results show that there is a positive correlation between the soil wetted front migration and the temporal variation of dripper discharge.When the dripper water is 5 L,both horizontal and vertical distances of wetted front reaches 50 cm.The moisture content of soil wetted front and its distance from the dripper have a good quadratic function.All these results are valuable for designing subsurface drip irrigations and carrying on relative experiments.

关 键 词：地下滴灌 滴头流量 灌水量 湿润体 

分 类 号：P338.6[天文地球—水文科学]