When the South West Monsoon sets around the beginning of June the winds
carrying the clouds also reach Andhra Pradesh. these winds reach rayalaseema districts of Chittoor and Kurnool
first. However they bring very little rain as most of the mositure in the clouds
falls down in rain the Western Ghats and only dry clouds and winds reach
rayalaseema.
i) Which districts of Rayalaseema receive monsoons first ? Why do these
winds bring very little rainfall?
Answers
Answer:
Rayalaseema region also received excess rainfall in September due to break monsoon conditions and ill-defined synoptic movement of the systems from east to west, activating the existing trough from Chhattisgarh to South Tamil Nadu across Rayalaseema, a retired Director of the IMD P.V. Rama Rao told The Hindu.
Mr. Rama Rao collected the data from the Meteorological Centre, Hyderabad, and analysed it based on the study of weather systems and their influence on rainfall distribution.
The south-west monsoon (June 1 to Sept 30) is the main rainy season over AP and Telangana.
While Telangana receives 75 cm, being 80% of its annual normal rainfall of 94 cm, coastal Andhra Pradesh (excluding Prakasam and Nellore) receives 70 cm, 64% of the annual normal rainfall of 108 cm, while Rayalaseema receives 40 cm, i.e., 56% of its normal annual rainfall of 71 cm.
The Prakasam district receives 38 cm, 47% of its annual normal of 71 cm and Nellore district receives 35 cm, being 32% of its annual normal rainfall of 109 cm.
“During the south-west monsoon season, the eastern parts of south peninsular India, south of 16 degrees north latitude, do not get enough rain, as they are shielded by the Western Ghats and hence they are known as ‘rain shadow areas’.
Tamil Nadu, Rayalaseema and adjoining districts of Nellore and Prakasam come under this area,” says Mr. Rama Rao.
The groundwater levels recorded a sharp rise by 8.78 m (29 feet) in Rayalaseema during the same period.
Answer:
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