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Analysis of rainfall pattern in Vadodara city
 

The climatic data of Vadodara city for a period of 110 year from 1901 to 2010 indicated that;

  • 2010 recorded the highest temperature for the last 58 years in May and the heat wave condition prolonged till June end. The rains were delayed and arrived in month of July.
  • Records show that the average rainfall in June declined over the years and was only 57.4 mm (2.2 inches) for the period (2006-10).
  • The average decadal rainfall has increased by 32% from 781 mm (30.7 inches) in 1901 -10 to 1154 mm (45.4 inches) in 2000-2010.
 
RF
  • The number of rainy days has declined from 53 days/year (1936-50) to 42 days/year (1995-2010).
  • The intensity of very heavy rainfall (5-10 inches in 24 hours) has almost doubled. It was 7 days in the time period 1936-1950 and 16 days in the time period (1995-2010).
 

Years

 

 

Avg.
Rainy days
/year

Average days / year with heavy rainfall

Avg.

Rainfall mm

Heavy
(64.5-124.4 mm)
(2 – 5 inches)

Very Heavy
124.5-244.4  (mm)
(5-10 inches)

Extremely Heavy
>244.5mm
(>10 inches)

1936-1950

896.11 mm (35.27 inches)

52.87

39

7

1

1956-1970

913.95 mm (35.98 inches)

59.76

35

9

1

1996-2010

1074.05 mm (1074.05)

41.69

48

16

2
  •  Heaviest rain occurred in Vadodara city on 7th September 1970 517.14 mm (20.36 inches), followed by 372.11 mm (14.65 inches) on 24th September, 1945 and 315 mm (12.4 inches) on 1st July 2005.
  • Due to increase in the number of days with rains between 124.5 - 244.4 mm  (5-10 inches), there is water logging problem in the city.
  • The storm drains created in the city are not adequate to quickly drain out the amount of water being collected on the roads.
  • The problem is aggravated due to loss of wetland area as the city has lost 64 ha of wetland area over the years.
  • Some of the measures that need to be implemented are recharge of roof water for buildings (with built-up area more than 1200 sq ft), as the water from these buildings are presently being released into the streets adding on to water logging problem.
 

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