江西红壤缓坡地壤中流特征研究

On Interflow of Gentle Hill in Jiangxi Province

以地表植被覆盖、死地被物敷盖、裸地三种类型的坡面为研究对象，采用径流小区试验方法，研究江西红壤表层（距地表30cm）、底层（距地表60cm）壤中流及地下径流（距地表105cm）特征，结果表明：1．壤中流量占降雨量0．92％-3．23％；2．基流占总径流量的50％以上，地表植被覆盖良好或死地被物厚度较大时，基流占总径流量的90％以上，壤中流量排序为覆盖〉敷盖〉裸地；3．地表植被覆盖、死地被物敷盖小区壤中流量分别是裸地壤中流量的2．45倍和3．52倍，两种措施都延长径流历时，减小洪峰流量；4．覆盖小区底层壤中流量小于表层壤中流量，而其他两个小区底层壤中流量大于表层壤中流量；5．壤中流季节分布以春夏较大，冬秋较小，但敷盖地块表层、裸地底层例外。

Interflow and underground runoff were studied on bare slope, litter covered slope, vegetation covered slope in Jiangxi Province by plots methods. The results showed that： 1. the interflows accounted for 0.92% to 3. 23% of rainfall ; 2. base flow accounted for more than half of total runoff, and the ratio execcded 90% at well covered slope, Interfiow quantity ranked as vegetation covered slope 〉 litter covered slope 〉 bare slope ; 3. the interflows of vegetation covered slope and litter covered slope were 2.45 times and 3.52 times more than those in bare slopes ; 4. the interflow at bottom soil was less than these the surface on vegetation covered slope; but in the other slope the condition was reverse ; 5. the interflows at spring and summer were larger than that of winter and autumn with the exceptions at the surface level of vegetation slope and the bottom of bare slope.