涌泉根灌多点源交汇入渗湿润体试验研究

在米脂山地微灌枣树示范基地进行原状土涌泉根灌入渗试验,研究了多点源交汇入渗条件下涌泉根灌湿润体特征值的变化规律.结果表明,涌泉根灌多点源交汇入渗孔洞处和交汇面处的湿润锋运移距离与入渗时间均符合幂函数关系,交汇面处的湿润锋运移速度比孔洞处的快,最终交汇入渗湿润土体沿孔洞布置方向的剖面形状近似带状;在孔洞底部周围的中间区域...

Experimental Study on Soil Wetted Volume of Multiple Point Sources from Surge Root Irrigation Interference Infiltration

Undisturbed soil surge root irrigation infiltration experiment was carried out at mountain micro-irrigation demonstration base for jujube at Mizhi,and the variation of eigenvalues of wetted soil is studied under the condition of multi-point source interference infiltration.Results show: the infiltration distance of soil wetted front were good power functional relation with infiltration time on the intersection surface side and the holes surface side under surge root irrigation,and the wetting front migration velocity at the intersection surface was faster than that at the hole,and that is,finally the profile shape of wetting soil under interference infiltration in the direction of hole arrangement would nearly become a ribbon.In the middle area around the hole bottom,the soil water content contour distribution was relatively complicated and the contour distribution was similar to the "saddle" on the topography.The double point sources irrigation got the best irrigation effect under surge root irrigation.