地下滴灌土壤水分运动室内试验研究

Laboratory Experimental Study on Soil-water Movement of Subsurface Drip Irrigation

通过室内试验,对地下滴灌土壤水分分布进行了直接观察分析。试验发现滴灌管壁的导水作用将对土壤水分分布也产生一定影响;地下滴灌3个方向上的湿润锋运移也均近似为时间平方根的线性函数;另外,滴头埋于地下后,其出流量将会受到周围土壤密实度的影响等。这些初步结论将对实际田间的地下滴灌技术的规划设计有一定参考应用价值。

Based on a primary experiment in the laboratory, the soil-water distribution of subsurface drip irrigation (SDI) was directly observed and analyzed. The experiment discovered that in the condition of SDI, the function of conduit wall's leading water which influences soil-water distribution can't be ignored; And the movement distances of wetted peaks in three directions are also the linear functions of square root of time; In addition, if the trickle is buried, trickle discharge rate will be influenced by soil compaction rate, etc. All these elementary conclusions are expected to have some practical and referential value for SDI technique engineering design.