It is the aim of the present paper to examine some of the views of process, time and change held by 6 major figures who are, at least ostensibly, members of the « dynamic » tradition (Hutton, Lyell, Darwin, Dana, Gilbert and Horton). It is suggested
that the work of the 6 reveals two contrasting attitudes to ideas of change and of equilibrium.
The AA. investigate river profile response to continuous base level drops using a computer model. In the analysis of results, they pay particular attention to indicators of headwaters erosional response to this type of base level change.
This paper evaluates the saltation-induced, near-surface convergence of velocity profiles as a function of changes in apparent surface roughness, and demonstrates that the focal point effect is an artifact resulting from the coincident increase
, and will directly and indirectly control flood power within the drainage network through its control on the rates of change of several hydraulic variables during discharge increases.