Mathematics – Logic
Scientific paper
May 1972
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972esrv....8...45d&link_type=abstract
Earth Science Reviews, Volume 8, Issue 1, p. 45-72.
Mathematics
Logic
Scientific paper
In common with other earth sciences, geomorphology has made rapid progress during the 1960s, greatly altering its techniques, concepts, and aims. The main single change has been the input of quantitative methods, especially of those depending on data-processing by computer. This account concentrates chiefly on fluvial morphology, but parallel reviews could readily be made for the morphology of arid zones, semi-arid zones, the humid tropics, and periglacial and glacial/glaciated areas. Horton's work, first comprehensively summarized in 1945, has been followed by an earnest enquiry into the significance of drainage-net topology. Research on stream channels, originating mainly with the U.S. Geological Survey, has been extended into the investigation of minimum variance and into the establishment of thermodynamic analogs for fluvial behavior. Increasingly, the application of stochastic methods has come to emphasize the significance of random variation. Climatic geomorphology, the documentation of which is very bulky, is currently under strong challenge from some quarters, but finds powerful support in field records of the effects of clima-morphogenetic shift. Slope research, long a central concern of geomorphic work, has taken a new turn with the establishment of the Virgil Network, which is centrally involved with the speed of operation of contemporary geomorphic processes in general. In view of the rapidly-changing character of modern geomorphology, predictions of direction are hazardous, even for the near future; but is seems likely that applied environmental work, the extended use of remote sensing techniques, and theoretical abstraction in the in the form of model-building can be expected to continue their development.
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