ANALYSIS OF TEMPORAL AND SPATIAL RAINFALL OF KODAGU DISTRICT
Loading...
Files
Date
2015-07-10
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
The study aims at analysing the distribution of rainfall across Kodagu district
using the weekly rainfall data of 24 rain gauges for a period of 40 years from 1972 to
2012. Rainfall data was obtained from Directorate of Economics and Statistics,
Government of Karnataka. The study period was divided into four sub periods each of
a decade in order to examine the temporal variation in rainfall. Analysis was also
carried out over the seasons namely, pre-monsoon, South west monsoon and post
monsoon. Further the probability model for wet spells was fitted. The annual rainfall
of three taluks of Kodagu district shows a significant variation during all four periods
of study. The distribution of rainfall across seasons indicates a shift in rainfall pattern
from south west monsoon to post and pre monsoon seasons. The proportion of decline
in rainfall during the south west monsoon which is offset by an increase in proportion
of pre-monsoon and post monsoon rainfall indicates the temporal shift in rainfall. It
can also be observed that there was a considerable temporal variation in rainfall
within all the taluks during South west monsoon season. The Kendall’s coefficient of
concordance on the values of Precipitation ratio indicates a significant spatial
variation in rainfall of Kodagu district. On the basis of Seasonality Index, Kodagu
district can be broadly classified into two rainfall regimes namely region which
experience seasonal rainfall with shorter drier season and region experiencing long
wet spells especially during South west monsoon. The length of the wet spells of
Kodagu can be modelled by Truncated Beta Binomial distribution.
Description
Keywords
null