Wednesday, 31 August 2017

Sunday, 13 May 2018

Some current trends in Geomorphology

Geomorphology is a systematic and organized description and analysis of the landforms of earth. Some current trends in geomorphology has resulted crucial impact in today's world. Geographers gave given innumerable definitions related to geomorphology, 

(a) According to P.G Worcestor, "Geomorphology is the inter-pretative description of the relief features of earth. It describes the surface of the lithosphere, explain its origin and interprets its history."

(b) According to O.D Von Anglew, "Geomorphology is not only the science of landform but includes within it, the shape of the entire earth, its configuration and disposition of the largest unit."

(c) According to William D. Thornbury, "Geomorphology is primarily Geology."

Today, we will be discussing about some current trends in geomorphology, evoked in the last few years or decades.
Geomorphology has resulted a great change from ancient days till now, resulting in the generation of some current trends in geomorphology


Some current trends in Geomorphology

These current trends in Geomorphology that we are talking about are been discussed below :

1. Increasing cooperation between geographers and geologists - W.M Davis considered geomorphology to be a part of geography. According to him, geomorphology is basically concerned with the study of present. Thus, it should therefore be considered to be part of geography and not geology which is concerned with the study of past. Development of geomorphology has been more geological than geographical, mainly due to two reasons. Firstly, the geomorphic studies have been found more useful for the different branches of geology and there has been increasing application of geomorphology to the study of engineering geology, soil science etc. Secondly, the American geographers have taken less interest in the study of physical geography and emphasized the human aspects of geography. The cooperation of geographers and geologists is both desirable.

2. Growth of structural geomorphology - A part from the physical laws governing the operation of the agents of denudation, the materials upon which these agents act have come to be more closely studied in terms of their physical properties. The creation of new crustal structures by volcanicity and tectonic activity, crustal behaviour and deformation have increasingly become a concern and interest to geomorphologists. This field of study is termed as structural geomorphology. With the spread of sea floor and plate tectonics, physiography of the ocean basina has become an integral part of geomorphology.

3. Increasing criticism of Davisian model - In the last forty years, the views of W.M Davis, especially his concept of cycle of erosion and concern with denudation chronology has been greatly criticized. According to Davis, in semi arid climates, the lmdscape resulted from the action of water is considered to be pediplain and not peneplain. People are not inclined to accept the view that there are different periods of land uplift and land erosion. They are not prepared to accept the cyclic concept in the evolution of landscape. Davis's mistake was to regard only the stage as cyclic ; he completely ignored the possibility of changes in process. Within his model, it was difficult to locate landscapes into an exact stage.

4. Growth of climatic geomorphology - According to climatic geomorphology, the landscapes which develop at different climates are different and the process of erosion differ significantly in different climatic regions. Climate excerts its influence through the natural vegetation because every region has its own distinctive natural vegetation. The proponents of climatic geomorphology are Petlier, Budel, Tricart ad Cailleux. Petlier identified nine morphogenetic regions, glacial, periglacial, boreal, maritime, selva, moderate, savanna, semi arid and arid. Tricart and Cailleux viewed that relief is dependent on climate and that in addiction to their direct vegetation and soil. Budel considers climate to be more important than structure in geomorphic evolution. He divided the earth's surface into five zones, glaciated areas, pronounced valley, extra-tropical, sub-tropical and tropical zone.

5. Growth of applied geomorphology - According to applied geomorphology, the practical applications of geomorphology in day to day life are examined. Geomorphological knowledge is been used in engineering projects, in the determination of mineral resources, construction of roads and dams, flood-control, soil conservation and establishment of human settlement. Thus, a close relationship is developed between the landforms and human activities which had add a new dimension to the subject.

Geomorphology has altered its objectives and techniques in the last few years, resulting in the generation  of some current trends in geomorphology, mentioned above.  These current trends in geomorphology have had a great impact worldwide. Knowing about the current trends in geomorphology, would further help us to get a clear and vivid picture about the origin and development of the landforms of world, with which geomorphology deals with.

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