Lok Sabha Question No. 660 (UNSTARRED), answered on 2021-12-01
Subject: Rainfall Variance
Ministry: EARTH SCIENCES
Asked by: S.R. Parthiban, Vijayakumar (alias) Vijay Vasanth

## GOVERNMENT OF INDIA MINISTRY OF EARTH SCIENCES LOKSABHA

## UNST ARRED QUESTION NO. 660 2021

## TO BE ANSWERED ON WEDNESDAY, 1ST DECEMBER,

## RAINFALL VARIANCE

## 660. SHRI PARTHIBANS.R.:

SHRI VIJAYAKUMAR (ALIAS) VIJAY VASANTH:

Will the Minister of EARTH SCIENCES be pleased to state:

- (a) the actual rainfall recorded between June and October, 2021 in each State/Union Territory;
- (b) the details of intensity of rainfall recorded in different States during the above period;
- (c) whether the Government has identified the areas which had variance in rainfall;
- (d) if so, the details thereof, State-wise and the reasons for such variance; and
- (e) the steps taken/proposed to be taken for effective use of this rainfall for productive purposes?

## ANSWER

## THE MINISTER OF STATE (INDEPENDENT CHARGE) FOR MINISTRY OF SCIENCE AND TECHNOLOGY AND EARTH SCIENCES

(DR. JITENDRA SINGH)

- (a)-(b) Details of the actual rainfall and the intensity of rainfall are given in Annexure-I.
- (c)-(d) 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.
- (e) The rainfall variance information is used for the R&D activities within the ministry and also shared with other stakeholders for its effective use and planning.

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| CATEGORYWISE DISTRIBUTION OF NO. OF STATES   | CATEGORYWISE DISTRIBUTION OF NO. OF STATES   |
|----------------------------------------------|----------------------------------------------|
| CATEGORY                                     | PERIOD: 01.06.2021 TO 31.10.2021             |
|                                              | NO. OF STATESIUTs                            |
| LARGE EXCESS                                 | 0                                            |
| EXCESS                                       | 6                                            |
| NORMAL                                       | 23                                           |
| DEFICIENT                                    | 8                                            |
| LARGE DEFICIENT                              | 0                                            |
| NO RAIN                                      | 0                                            |
| NO DATA                                      | 0                                            |

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