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Doctorat
Inde
1990- 1999
An Agroclimatic Assessment of the Crop Growth Potential of South India
Titre : An Agroclimatic Assessment of the Crop Growth Potential of South India
Auteur : Lekha, P V
Université de soutenance : Cochin University of Science and Technology
Grade : Doctor of Philosophy (PhD) in Meteorology 1992
Descriptif
The thesis consists of six Chapters of which the first
Chapter gives the introduction to the problem and also the scope
of the study. In the first Section of the second Chapter,
relevant literature on water balance studies, estimation of
potential evapotranspiration, studies on rainfall distributions,
climatic classifications in general and agroclimatic
classifications in particular, has been reviewed. The review
also includes literature on evaluation of crop growth potentials
and analysis of wet and dry spells over different climatic
regimes. The second Section of this Chapter explains the method
of estimation of potential evapotranspiration, water balance
computations, and techniques used for the rainfall analysis
(Gamma distribution method) in the investigation. The criteria
employed for agroclimatic classification and the method of
rainfall analysis to assess wet and dry spells by Markov chain
model have also been given in detail.
The third Chapter comprises of a discussion of physical and
climatic features of the study region. The first Section gives
details about the location and extent, physiography, drainage,
soil types, natural vegetation, land-use and the major crops
grown in the region. The second Section concerns itself with the
rainfall, temperature, and humidity characteristics of the
region. The distributions of water balance parameters, namely
potential evapotranspiration, actual evapotranspiration, water
deficit ano water surplus are also mapped and discussed in this
Section.
The analysis of weekly rainfall, using Gamma distribution
method and the agroclimatic classification, based on moisture
availability index have been dealt with in Chapter IV. The crop
potentials of individual stations of each agroclimatic type have
been separately discussed in detail in this Chapter.
Using the first order Markov chain model, the weekly
rainfall has been analysed in the fifth Chapter to determine the
probabilities of dry and wet spells and to assess crop growth
potentials of different growing seasons in the region.
The sixth Chapter comprises of the summary of the study and
conclusions about the agroclimatic assessment of the crop growth
potential of South India.
Page publiée le 11 février 2021