Southwest monsoon brings 26% excess rain to Coastal A.P., improves groundwater
The Hindu
Retired IMD Director analyzes 2024 monsoon performance, heavy rains improve groundwater levels in coastal Andhra Pradesh.
The torrential rains and the floods in the Budameru caused untold misery to the people living in many areas of Vijayawada City. The heavy rains, which occurred towards the fag end of the Southwest monsoon, however, resulted in 26% excess rain in coastal A.P. and improved the groundwater levels.
Retired Director of the IMD P. V. Rama Rao, has analysed the ‘performance of the SW monsoon-2024’ using data obtained from websites of the India Meteorological Department (IMD) and the A.P. Ground Water Department as also from newspapers.
The SW monsoon advanced into Rayalaseema and coastal Andhra Pradesh on June 2, this year, it covered the entire Rayalaseema region by June 4 and coastal A.P. by June 20. The advance of moist SW monsoon current suppressed the hot spell and brought relief to the people.
The low pressure systems which form or move over westcentral and adjoining northwest Bay of Bengal off Andhra-Odisha coasts, provide triggering mechanism and activate or even revive monsoon flow and cause heavy rainfall over Andhra Pradesh and Telangana States.
After crossing the coast, these systems generally move in a west-northwesterly direction and increase rainfall in their vicinity and the areas along the path followed by them. They cause vigorous monsoon with very low clouds and heavy spells of rain, especially in the west and south and more so in southwest sector of the system, says Mr. Rama Rao.
The system in the affected area may cause heavy rains at many places and on few occasions extremely intense spells of rain, cause extremely heavy rain falls (> 21 cm) or exceptionally heavy rainfalls (>30 cm) in 24 hours. They are followed by flash floods which may cause extensive damages to property and in extreme cases even cause loss of human lives.
In the season, normally low velocity wind systems up to deep depression stage form and no major damages occur due to winds over land areas due to frictional forces. However, on few occasions ‘Rain Storms’ occur and cause extensive damages to agriculture and infrastructure.
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