Lok Sabha Question No. 133 (UNSTARRED), answered on 2022-12-07
Subject: Rainfall Pattern
Ministry: EARTH SCIENCES
Asked by: Jagdambika Pal

## GOVERNMENT OF INDIA MINISTRY OF EARTH SCIENCES LOK SABHA

## UNSTARRED QUESTION NO. 133 TO BE ANSWERED ON WEDNESDAY, 7 TH  DECEMBER, 2022

## RAINFALL PATTERN

## 133. SHRI JAGDAMBIKA PAL :

Will the Minister of EARTH SCIENCES be pleased to state:

- (a) whether the rainfall pattern has changed in different parts of the country, wherein some parts are receiving heavy rainfall and some parts receiving less rainfall;
- (b) if so, the details thereof;
- (c) whether  the  Meteorological  Department  has  conducted  any  survey  through  experts  to ascertain reasons for extreme diversity in the rainfall during the monsoon season recently, if so, the details thereof; and
- (d) the details of the steps taken by the Government to prevent such changes in the rainfall pattern?

## ANSWER

THE MINISTER OF STATE (INDEPENDENT CHARGE) FOR MINISTRY OF SCIENCE AND TECHNOLOGY AND EARTH SCIENCES (DR. JITENDRA SINGH)

- (a)-(c)  Yes Sir. India Meteorological Department (IMD) has carried out an analysis of observed monsoon  rainfall  variability  and  changes  of  29  States  &  Union  Territory  at  State  and District  levels  based  on  the  IMD's  observational  data  of  recent  30  years  (1989-  2018) during the Southwest monsoon season from June to September (JJAS) and issued a report on 30 March 2020. The reports on observed rainfall variability and its trend for each State and  Union  Territory  are  available  in  IMD  website  (https://mausam.imd.gov.in/)  under 'PUBLICATIONS' as well as in IMD Pune website;

http://www.imdpune.gov.in/hydrology/rainfall%20variability%20page/rainfall%20trend. html

The highlights of the report are given below;

-  Five states  viz.,  Uttar  Pradesh,  Bihar,  West  Bengal,  Meghalaya  and  Nagaland  have shown significant decreasing trends in southwest monsoon rainfall during the recent 30 years period (1989-2018).
-  The annual rainfall over these five states along with the states of Arunachal Pradesh and Himachal Pradesh also show significant decreasing trends.
-  Other  states  do  not  show  any  significant  changes  in  southwest  monsoon  rainfall during the same period.
-  Considering district-wise rainfall, there are many districts in the country, which show significant  changes  in  southwest  monsoon  and  annual  rainfall  during  the  recent  30 years  period  (1989-2018).  With  regard  to  the  frequency  of  heavy  rainfall  days, significant increasing trend is observed over Saurashtra & Kutch, Southeastern parts of Rajasthan, Northern parts of Tamil Nadu, Northern parts of Andhra Pradesh and adjoining areas of Southwest Odisha, many parts of Chhattisgarh, Southwest Madhya Pradesh, West Bengal, Manipur & Mizoram, Konkan& Goa and Uttarakhand.
- (d) IMD has  an  effective  forecast  and  dissemination  mechanism  through  which  necessary warnings and advisories are issued throughout the country well in advance for preparedness.  The  information  on  change  in  rainfall  pattern  is  also  shared  with  other stakeholders for its effective use and planning.

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