关键词: 湿润区, 红层, 红层地貌, 生态环境, 土地退化

Abstract: Although red beds are a widespread landscape in China, geosciences academia fail to pay much attention to it, and a lack of collaboration among related fields results in a trend that different disciplines have different interpretations of the same issue; specifically, much concern on red beds, the fragile geographical unit, is highly needed with regard to land degradation and environmental problems. Humid area in southern China is one of the places where red beds are densely distributed. However, most of red beds areas are suffering from serious geomorphological catastrophes and soil-water erosion; even worse, many places are witnessing huge patches of 'red beds desert'. Even if we might admit that irrational land use contributes to the land degradation in red beds, there is no doubt that land degradation is a natural result of rock landscape evolution. This paper first indicates that natural evolution serves as a process of multi-factors' effect, which can be regarded as a system of mutual causality. Also, this paper analyzes the current researches on slope erosion mechanism of red beds landforms and areas, and raises scientific problems in red beds researches are facing with. Furthermore, this paper claims that a new interdisciplinary thinking of System Dynamics should be introduced to conduct a comprehensive research on the interrelation between red beds and landform development, natural catastrophes, soil erosion, environment degradation, overall geographic environment as well as production-living. Finally, this paper will hopefully find a way to promote land management and environment optimization.

Key words: humid area, red beds, red beds landforms, ecological environment, land degeneration