Water Users Association and Irrigation Management - Institute for ...

Figure 4.2: Distribution of Rainfall in Gangavathi Taluk
rainfall (mm.)
300
250
200
150
100
50
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Source: Ganga\athi Taluk Office.
Rainfall and climate
Both the study villages have a tropical, semi-arid climate and fall in the northern dry zone.
The daily maximum temperature ranges from 42-44 degree Celsius in May and the mean
daily minimum temperature is 31-34 degree Celsius in December. The villages fall under
the rain-shadow region characterized by sparse and highly variable seasonal rainfall. The
average rainfall is approximately 250 mm, with a variation between 391.3 mm to 914.0 mm
(see Figure 4.2). Rainfall is generally mono modal and the district receives 71 percent of
the annual rainfall during the south-west monsoon months i.e. June-July to September­
October. On an average, there are 41 rainy days in a year of normal rainfall. A day with 2.5
mm or more of rain is considered as a rainy day, but rainfall varies considerably between
years.
Topography
The topo!,'Taphy in Gundur varies from flat to gently undulating. Some of the areas have
local depressions or moulds, but these are not significant enough to be considered. The
existing natural drains dispose off the drainage water. In Hagedal, the area has slight
undulations with moulds and are cut up in places by waterways, which have become
drainage channels of the area when water is let in during the cropping season. Flat areas are
cultivated and fairly undulating areas in the both the villages are used for habitation.
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