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Utkal University (1995)

Water balance and its applications in Orissa a study in applied climatology

Mishra, Mihir Prasad

Titre : Water balance and its applications in Orissa a study in applied climatology

Auteur : Mishra, Mihir Prasad

Université de soutenance : Utkal University

Grade : Doctor of Philosophy (PhD) in Applied Geography 1995

The present thesis is an attempt at a detailed study of ecoclimatic aspects of Orissa based primarily on the Thornthwaite’s water balance concept. The first chapter deals with the general introduction and the various applications of Thornthwaite’s water balance procedure in the field of climatology. Emphasis has given on problem of the study, data base of the study and organisation of the study. The second chapter is divided into six sections. It deals with the geographical base of the region under different heads like physiography, geology, drainage, climate, soil and vegetation. The third chapter deals with the methods and procedures of water balance techniques. Water balance computations were made in this chapter. The fourth chapter is divided into two sections. The first part deals with water balance and climatic zones of Orissa. The second part deals with the climatic zones and vegetation types. In this section the systematic correlation between vegetation zones and climatic types are discussed. The vegetation map of the state based on Thornthwaite’s thermal and moisture regime is compared with the vegetation maps produced by LANDSAT 5 and Champion. In chapter five the water balance and •their role in agriculture are discussed. Chapter six is divided into, two parts. The first part deals with the general methods ofdrought study. The same section also contains a general account about the cause of droughts and the earlier methods of drought analysis under three head (a) statistical (b) non statistical and (c) water balance methods. The method employed in the present investigation using the aridity index of Thornthwaite as central parameter is also discussed in detail. Famine due to drought and their impact on population of Orissa are discussed in the second part of the chapter six. Chapter seven has three sections ; proneness of drought and areas of drought proneness of Orissa in the first section(a) aridity patterns over the region and spread of drought are presented in section(b) duration and severity of drought spells at all stations under study in detail in section(c). In the last chapter few suggestions and conclusions are made regarding agricultural and hydrological planning of the state on the basis of water balance analysis with special reference to drought prone regions of Orissa. Lastly an exhustive bibliography follows to conclude the thesis. Water balance, the way it has been presented in this thesis is a rapidly growing field and is finding applications in several disciplines. As applications expand and results multiply and thesis too requires amplification, modification or alterations at various stages. Until then or perhaps even later this work may be expected to serve as a guide of immense use and benefit

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