ABSTRACT
Although the idea of critical limits, boundary conditions, and yield points form an important part of other disciplines, similar terminology constitutes only a small part of the literature in geomorphology. This chapter identifies the place of threshold topics in the mainstream of geomorphology. It is imperative that research generate the conceptual framework and the prerequisite data base to aid in the formation of predictive and planning strategies for proper environmental management. The discipline of geomorphology was largely an outgrowth of physical geography and its derivative of physiography. The types of thresholds could be further divided regarding the special manner in which they apply to each of the geomorphic processes. One of the important benefits that emerges from an understanding of thresholds is the practical use of such knowledge for environmental planning. Topographic thresholds are present in many terrains: waterfalls, cliffs and mountain fronts.
