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采用室内试验的方法 ,分不同坡度、不同单位面积生物量干重研究了三种森林植被枯落物 (油松、刺槐、荆条 )的持水阻水特性 .试验结果表明 ,相对于固定雨强的人工降雨过程 ,枯落物的截持降雨过程具有三阶段特征 :即吸水上升阶段、相对稳定的截持降雨阶段、降雨停止后的排水阶段 .在整个人工降雨过程中 ,枯落物的透过雨强明显小于控制雨强 .SPSS曲线回归分析表明三种枯落物糙率系数与单位面积枯落物干重显著相关且随着枯落物干重的增加而增大 ,并符合三次多项式关系
The indoor water-holding characteristics of three kinds of forest litter (Pinus tabulaeformis, Robinia pseudoacacia, Vitex negundo) were studied by indoor experiment with different slope and dry weight of biomass per unit area.The results showed that the water- Of the artificial rainfall process, litter interception rainfall process has a three-phase characteristics: the suction stage, the relatively stable stage of interception rainfall, rainfall after the stop of the drainage stage in the whole process of artificial rainfall, litter through The rainfall intensity was obviously less than that of the control rainfall intensity.PSS curve regression analysis showed that the roughness coefficient of three kinds of litter was significantly correlated with the dry weight of litter per unit area and increased with the dry weight of litter and accorded with cubic polynomial relationship