地理学报 ›› 1993, Vol. 48 ›› Issue (4): 367-376.doi: 10.11821/xb199304008

• 论文 • 上一篇    

流域地貌系统的侵蚀演化与耗散结构

马新中, 陆中臣, 金德生   

  1. 中国科学院、国家计委地理研究所, 北京 100101
  • 出版日期:1993-07-15 发布日期:1993-07-15
  • 基金资助:

Evolution and Pissipative Structure in the Drainage-geomorphic system

Ma Xin Zhong   

  1. Institute of Geography, Chinese Academy of Sciences, Beijing 100101
  • Online:1993-07-15 Published:1993-07-15

摘要: 通过耗散结构的方法和概念,建立了流域地貌系统中熵产生和超熵产生的表达式。以此分析了流域系统的动力学机制,以黄土高原丘陵沟壑区为例,建立了流域地貌系统的侵蚀演化模型。定量描述了黄土高原丘陵沟壑区流域系统的侵蚀旋回,确定了流域的发育阶段。分析了流域系统侵蚀状况的空间不均匀性。

关键词: 侵蚀积分值, 侵蚀模数, 动力学机制

Abstract: In this paper .the concepts of entropy ,flux and force in the drainage-geomorphic system have been introduced ,and an equation for the entropy production and super-entropy production has al-so been conducted,According to this concept,dynamic mechanism in the drainge-geomorphic sys-tem is analysed ,and an evolutional model for the development the drainage-geomorphic system in a hill-gully area on the loess plateau is developed. The model is suitable for the entire process of drainage-geomorphic system. By using this model the erosional cycle in the hill-gully area can be divided into three stages. By quantitatively analysing the Erosional Cycle Theory of Davis and dif-ferent soil erosions at the different stages,non一uniform erosional properties of a drainage-geo-morphic system in space is also founded.

Key words: Erosional intergral value, Erosional modals, Dynamic mechanism