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Doctorat
Inde
1990- 1999
Studies on space-time variabilities of hydrometeorological parameters over Kerala state
Titre : Studies on space-time variabilities of hydrometeorological parameters over Kerala state
Auteur : James, M E
Université de soutenance : Cochin University of Science and Technology
Grade : Doctor of Philosophy (PhD) in Meteorology 1991
Descriptif
The spatial and temporal variabilities of some hydrometeorological
parameters over the State have been analysed in the present study. The
thesis consists of six Chapters including the introduction. The first
section of the Second Chapter explains the concepts of hydrologic cycle and
water balance, various methods of estimation of potential evapotranspiration, book-keeping procedure of water balance of Thornthwaite (1948) and
the various applications of water balance techniques. The second section
of this Chapter is mainly concerned with the applications of time series
analysis in climatology. Various techniques such as power spectrum
analysis, Mann-Kendall statistic test, Student’s t-test and filtering
methods which are employed to reveal the temporal variations in time series
have been discussed. An exhaustive and relevant review of various
techniques of hydrometeorological studies are cited in this Chapter.
The third Chapter consists of a discussion of the important physicoclimatic features of Kerala State. The location and extent, physiography,
drainage, soil type, agricultural pattern and land-use systems over the
State are explained in the first section, while details about rainfall,
temperature, wind and humidity which form the climatological features are
discussed in the second.
The seasonal and annual distributions of normal water
parameters namely rainfall, potential evapotranspiration,
balance
actual
evapotranspiration, water surplus, water deficit, surface flow, underground
flow and total discharge over the State have been mapped and discussed to
present a broad picture of hydro-climatic background of the region in the
fourth Chapter. The spatial distribution of various indices derived from
the water balance procedure, such as moisture adequacy index, aridity
index, humidity index, and moisture index have also been presented.
Classification of climates of Kerala based on Thornthwaite’s scheme has
also been depicted in this Chapter.
The fifth Chapter deals with the time series analysis of rainfall,
actual evapotranspiration, water deficit and water surplus over the State
as revealed by spectrum analysis and trend aspects as indicated by MannKendall statistic, Student’s t-test and low pass filtering techniques.
The sixth Chapter comprises the summary of the study and conclusions
about the spatial and temporal variation of hydroclimatic parameters over
the State.
Page publiée le 11 février 2021