Wednesday, 31 August 2017

Tuesday, 6 March 2018

Geomorphology and Recent trends of Geomorphology

Geography is the study of the physical environment,in relation to the human world.The concepts of geography ,are seen to have rooted in the thinking of the philosophers and geographers in different forms.Geography is a link subject between physical and social sciences. It includes both nature and man, on their relationship.
Geomorphology and Recent trends of Geomorphology are been briefly and precisely discussed below. 

Geomorphology  is a systematic and organized description and analysis of the land forms of earth. Different geographers gave different definitions, some of them are -

(a) According to P.G Worcestor, "Geo morphology 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, "Geo morphology is not only the science of land form but includes within it, the shape of the entire earth, its configuration and disposition of the largest unit."
(c) According to William D. Thornbury, "Geo morphology is primarily Geology."


Geomorphology and Recent trends of Geomorphology

Geomorphology-and-Recent-trends-of-Geo-morphology


1. Increasing cooperation between Geographers and Geologists 

W.M Davis considered Geomorphology to be a part of geography. According to him, Geo morphology 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 Geo morphology has been more geological than geographical, mainly due to two reasons. Firstly, the Geo morphic studies have been found more useful for the different branches of geology and there has been increasing application of Geo morphology 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 behavior and deformation have increasingly become a concern and interest to Geomorphologists. This field of study is termed as structural Geo-morphology. With the spread of sea floor and plate tectonics, physiography of the ocean basina has become an integral part of Geo-morphology.

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 Geo morphology, the landscapes which develop at different climates are different and the process of erosion differ significantly in different climatic regions. Climate exerts its influence through the natural vegetation because every region has its own distinctive natural vegetation. The proponents of climatic Geo morphology 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 Geo morphology, the practical applications of Geo  morphology in day to day life are examined. Geo morphological 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 land forms and human activities which had add a new dimension to the subject.

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