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Monsoon Deficiency Narrows to 12% After Heavy September Rain
ஏன் செய்தியில்?
Monsoon deficit shrinks to 12%: the LPA and IMD rainfall categories Prelims Geography tests
Heavy rain cut the monsoon's seasonal deficiency to 12 per cent, with September 5 per cent below normal.
Why it matters: factual, Prelims-type
What you need to know
2 நிமிடம்
Rainfall in September is 5 per cent below normal, but heavy rain has shrunk the southwest monsoon season's overall deficiency to 12 per cent.
Forecasts of more heavy rain could bring September closer to normal.
The India Meteorological Department measures seasonal performance against the Long Period Average.
ஆதாரங்கள்: Topper IAS editorial (PIB / The Hindu / Indian Express)
முக்கிய உண்மைகள்
Remember these
- Monsoon season deficiency has narrowed to 12 per cent after heavy September rain
- September rainfall is 5 per cent below normal
- IMD measures seasonal performance against the Long Period Average (LPA)
- IMD terms the season 'deficient' when all-India rainfall is below 90 per cent of the LPA
- 'Normal' band is 96-104 per cent of the LPA
ப்ரிலிம்ஸ் · மெயின்ஸ்
How the exam will ask it
ப்ரிலிம்ஸ்
- The India Meteorological Department assesses seasonal monsoon rainfall against the Long Period Average (LPA).
- All-India seasonal rainfall below 90 per cent of the LPA is classed as 'deficient'.
- The 'normal' category of monsoon rainfall lies between 96 and 104 per cent of the LPA.
- The southwest monsoon season runs from June to September.
மெயின்ஸ்
GS-I Geography and GS-III Agriculture: a deficient monsoon hits kharif sowing, reservoir storage and rural incomes, while uneven spatial and temporal distribution matters as much as the seasonal total. IMD forecasting and LPA-based classification guide policy, and the way forward lies in contingency crop planning, better water management, crop insurance and climate-resilient agriculture.
Quick recall
Answer before you reveal
The India Meteorological Department classifies all-India seasonal monsoon rainfall as 'deficient' when it is less than what percentage of the Long Period Average (LPA)?
- 75 per cent
- 80 per cent
- 90 per cent
- 96 per cent
விடையைக் காட்டு
விடை: C — Correct: 90 per cent — IMD terms the season 'deficient' when all-India rainfall is below 90 per cent of the LPA. • 75 per cent — wrong: 75 per cent is not the IMD threshold; a season can be classed deficient well above this level. • 80 per cent — wrong: 80 per cent is not the IMD cut-off for a deficient season. • 96 per cent — wrong: 96 per cent is the lower limit of the 'normal' band (96-104 per cent of LPA), not of 'deficient'.
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