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Ray, Kamaljit
- The Catastrophe over Jammu and Kashmir in September 2014:A Meteorological Observational Analysis
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Authors
Affiliations
1 India Meteorological Department, New Delhi 110 003, IN
1 India Meteorological Department, New Delhi 110 003, IN
Source
Current Science, Vol 109, No 3 (2015), Pagination: 580-591Abstract
An observational analysis of the catastrophic rainstorm during 4-6 September 2014 over Jammu and Kashmir (J&K) presented in this study shows that the event was unprecedented in terms of the 24, 48 and 72 h accumulated rainfall. The 24 h accumulated rainfall exceeded the previously determined one-day severe rainstorm limits of 20 cm for a number of stations on 5 and 6 September 2014. Weekly cumulative rainfall (4-10 September 2014) exceeded the average rainfall of the entire monsoon season (June-September) in 6 out 18 districts of the state. A number of stations recorded all-time highest 24, 48 and 72 h accumulated rainfall during the week. Analysis of short-duration intensity of rainfall shows that the heaviest rain-rate (35 mm/h) was recorded over Kawa (Üdhampur district). The rain-rate remained less than 20 mm/h at other stations. As Kawa is on the windward side of the Pir Panjal Range, orography seems to have played a significant role. The analysis of synoptic conditions leading to unprecedented rainfall shows that the rains were caused by the interaction of the westwardmoving monsoon low pressure area across central and northwest India and a eastward-moving deep trough in the mid-tropospheric westerlies. The additional low pressure areas that formed over Saurashtra and Kutch on 3 September 2014 and over head Bay of Bengal on 5 September 2014, ensured the vigour of the event was maintained through strong wind and moisture flux in J&K. NWP models could capture heavy rains over J&K only in day 1 forecast.Keywords
Accumulated Rainfall, Low Pressure Area, Observational Analysis, Rainstorm.Full Text
- Heavy Rainfall in the Kedarnath Valley of Uttarakhand during the Advancing Monsoon Phase in June 2013
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PDF Views:91
Authors
Affiliations
1 40, Mausam Vihar, New Delhi 110 051, IN
2 India Meteorological Department, New Delhi 110 003, IN
3 Ministry of Earth Sciences, New Delhi 110 003, IN
1 40, Mausam Vihar, New Delhi 110 051, IN
2 India Meteorological Department, New Delhi 110 003, IN
3 Ministry of Earth Sciences, New Delhi 110 003, IN
Source
Current Science, Vol 109, No 2 (2015), Pagination: 353-361Abstract
During the monsoon season of 2013, the advance of monsoon over northwest (NW) Indian region showed large abnormality as arrival of rainfall over Punjab, Himachal Pradesh (HP), Uttarakhand, Haryana and Delhi occurred between 13 and 16 June 2013, nearly twice the standard deviation earlier than normal. Such an early arrival by mid-June has been exceptional. The event was marked by unprecedented very heavy rainfall between 14 and 18 June 2013 over different meteorological sub-divisions of NW India. The event also led to human tragedy in Uttarakhand, in which many local people and pilgrims lost their lives. This heavy rainfall in fact moved from Punjab and HP during 14 and 15 June 2013 to Uttarakhand. The rainfall between 14 and 18 June 2013 over NW India was highly organized and it was continuously sustained with mesoscale enhanced intensity over Uttarakhand, which dispels the opinion about cloudburst. The present communication is aimed to study the observational aspects of the vigorous and rapid advance of monsoon rainfall over NW India and its intensification during 15-17 June 2013 over Uttarakhand.Keywords
Heavy Rainfall, Landslides, Monsoon Season, Rapid Advance.Full Text
- Diurnal Variations in Rainfall over Indian Region Using Self Recording Raingauge Data
Abstract Views :257 |
PDF Views:90
Authors
Affiliations
1 India Meteorological Department, Lodhi Road, New Delhi 110 003, IN
1 India Meteorological Department, Lodhi Road, New Delhi 110 003, IN
Source
Current Science, Vol 110, No 4 (2016), Pagination: 682-686Abstract
Diurnal variation of rainfall of different intensities using self-recording raingauge data of about 150 stations spread across India is presented here. Analysis of annual average number of rainfall hours revealed that the highest number (>900) is realized over northeast India, followed by west coast (700-800). Lowest incidence (<100) was found over west Rajasthan. Distribution was nearly similar for hours with rainfall >10, >20 and >30 mm. A zone of less number of hours with different intensities extended from west Rajasthan to west Uttar Pradesh; and another one to south Tamil Nadu through Gujarat, west Madhya Pradesh and the rain shadow zones of Maharashtra, Karnataka and Andhra Pradesh. The percentage of contribution to total annual rainfall by intense rainfall of >20 mm and >30 mm, however, was found to be higher in the low rainfall zones and northwest India. Diurnal variation of rainfall showed prominent maxima in the early morning over northeast India; and in the afternoon/evening over northwest India and interior Peninsula. Coastal areas on east and west coast, however, did not exhibit any significant diurnal variations, but a tendency of higher frequency in the early morning was noticed.Keywords
Diurnal Variation, Katabatic–Anabatic Winds, Self-Recording Raingauge.Full Text
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- On the Recent Floods in India
Abstract Views :256 |
PDF Views:89
Authors
Affiliations
1 India Meteorological Department, New Delhi 110 003, IN
2 CSIR-National Geophysical Research Institute, Hyderabad 500 007, IN
3 Wadia Institute of Himalayan Geology, Dehradun 248 001, IN
4 School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110 067, IN
5 National Disaster Management Agency, New Delhi 110 029, IN
1 India Meteorological Department, New Delhi 110 003, IN
2 CSIR-National Geophysical Research Institute, Hyderabad 500 007, IN
3 Wadia Institute of Himalayan Geology, Dehradun 248 001, IN
4 School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110 067, IN
5 National Disaster Management Agency, New Delhi 110 029, IN
Source
Current Science, Vol 117, No 2 (2019), Pagination: 204-218Abstract
Floods in the Indian subcontinent have affected habitat, population, economy, etc. Due to the detrimental effects of recent floods on the economy, governance, etc., it is imperative to understand the associated dynamics, manifestations and fallouts for proper policy planning recommendations. The present study endeavours to provide an integrated rationale of meteorological and geomorphological aspects associated with four recent extreme floods in Uttarakhand (2013), Srinagar (2014), Chennai (2015) and Gujarat (2017). It is important to mention here that these floods occurred under different atmospheric circulations and geomorphological setting, and had an entirely different gambit for policy planning and governance. Consolidation of these issues will help policy planners and technologists, in case advance warning system based on these findings can be developed.Keywords
Advance Warning System, Disaster Management, Floods, Governance, Policy Planning.Full Text
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