小流域侵蚀地貌演化的计量分析  

Quantitative Analysis of Eroded Landform Evolution in Small Watershed

作　　者：武春龙[1] 李壁成[1] 雷会珠[1] 

机构地区：[1]中国科学院水利部水土保持研究所

出　　处：《土壤侵蚀与水土保持学报》1997年第4期55-61,共7页

摘　　要：通过对杏子河流域内２２条小流域沟谷纵剖面和斯特拉勒（Ｓｔｒａｈｌｅｒ）曲线的信息熵计算，表明流域沟谷纵剖面处于均衡状态，但流域侵蚀地貌处于壮年期状态。杏子河地貌演化与戴维斯（Ｄａｖｉｓ）模型的不同点是地貌未达准平原，就有内营力抬升作用，结果使地貌长期处于非平衡态。Based on quantitative information of eroded landform in Xingzihe basin, Shaanxi province, calculated the information entropy of the vertical profile of river valley and Strahler's curve, it is clearly showed that the vertical profile of river valley has reached to equlibrium stability, but the eroded landforms of small watersheds have been in uneqilibrium stage. The difference between landform evolution of Xingzihe basin and Davis's model is that because there were three times endogenic uplift action on Quternary, eroded landform never reached to peneplain, existed in unequlibrium in long time stage.

关 键 词：流域 地貌演化 信息熵 侵蚀地貌 抬升作用 

分 类 号：S157[农业科学—土壤学]