On the Recent Floods in India

Ray, K. C. Sinha; Pandey, Prabha; Pandey, Chhavi P.; Dimri, A. P.; Kishore, Kamal

doi:10.18520/cs/v117/i2/204-218

Cited by 102 publications

(37 citation statements)

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“…Dry and wet extremes have become frequent in India during the recent decades due to erratic monsoon and warming climate (Goswami et al, 2006; Mishra et al, 2012; Roxy et al, 2015, 2017; Singh et al, 2019). For instance, India has witnessed devastating floods in Uttarakhand (2013), Kashmir (2014), Chennai (2015), Gujarat (2017), Kerala (2018), Maharashtra (2019), Assam (2020), and Bihar (2020) that caused the loss of human lives and damage to agriculture and infrastructure (Kumar & Acharya, 2016; Ray et al, 2019). Ray et al (2019) reported that the recent floods in India occurred due to different atmospheric circulations and under different geomorphological settings.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, India has witnessed devastating floods in Uttarakhand (2013), Kashmir (2014), Chennai (2015), Gujarat (2017), Kerala (2018), Maharashtra (2019), Assam (2020), and Bihar (2020) that caused the loss of human lives and damage to agriculture and infrastructure (Kumar & Acharya, 2016; Ray et al, 2019). Ray et al (2019) reported that the recent floods in India occurred due to different atmospheric circulations and under different geomorphological settings. However, since precipitation extremes are projected to rise under the warming climate in India (Goswami et al, 2006; Mukherjee et al, 2018), extreme precipitation and initial hydrological conditions might have played a considerable role (Garg & Mishra, 2019; Sharma et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Increase in Population Exposure Due to Dry and Wet Extremes in India Under a Warming Climate

Kumar

Mishra

2020

Earth's Future

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Increase in Population Exposure Due to Dry and Wet Extremes in India Under a Warming Climate

Kumar

Mishra

2020

Earth's Future

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“…Similarly, on 17 June 2013, the state of Uttarakhand received more than 340 mm of rainfall resulting in disastrous flood and landslides that lead to unparalleled damage to life and property (Dube et al 2014;Martha et al 2015). The November 2015 Chennai floods, which resulted in over 500 deaths when Chennai experienced three times the usual rainfall, is another such example (Ray et al 2019). Each year, flooding in India from extreme rains results in a loss of around $3 billion, which constitutes about 10% of global economic losses (Roxy et al 2017).…”

Section: Introductionmentioning

confidence: 99%

The 2018 Kerala floods: a climate change perspective

2020

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In August 2018, the Indian state of Kerala received an extended period of very heavy rainfall as a result of a low-pressure system near the beginning of the month being followed several days later by a monsoon depression. The resulting floods killed over 400 people and displaced a million more. Here, a high resolution setup (4 km) of the Weather Research and Forecasting (WRF) model is used in conjunction with a hydrological model (WRF-Hydro, run at 125 m resolution) to explore the circumstances that caused the floods. In addition to a control experiment, two additional experiments are performed by perturbing the boundary conditions to simulate the event in pre-industrial and RCP8.5 background climates. Modelled rainfall closely matched observations over the study period, and it is found that this would this would have been about 18% heavier in the pre-industrial due to recent weakening of monsoon low-pressure systems, but would be 36% heavier in an RCP8.5 climate due to moistening of the tropical troposphere. Modelled river streamflow responds accordingly: it is shown the six major reservoirs that serve the state would have needed to have 34% more capacity to handle the heavy rainfall, and 43% had the deluge been amplified by an RCP8.5 climate. It is further shown that this future climate would have significantly extended the southern boundary of the flooding. Thus it is concluded that while climate change to date may well have mitigated the impacts of the flooding, future climate change would likely exacerbate them.

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“…Compared to droughts, floods typically occur over smaller locales in association with heavy precipitation and stream flows on shorter timescales (Dhar and Nandargi 2003;Kale 2003Kale , 2012Mishra et al 2012a;Sharma et al 2018). Every year, nearly 8 million hectares of the land area is affected by floods over India (Ray et al 2019). Droughts and floods across India are known to have complex linkages with the space-time distribution of monsoon rainfall and socio-economic demand (Sikka 1999;see Chap.…”

Section: Introductionmentioning

confidence: 99%

Droughts and Floods

Mujumdar

Preethi

Ramarao

et al. 2020

Assessment of Climate Change Over the Indian Region

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Key Messages • The frequency and spatial extent of droughts over India have increased significantly during 1951-2015. An increase in drought severity is observed mainly over the central parts of India, including parts of Indo-Gangetic Plains (high confidence). These changes are consistent with the observed decline in the mean summer monsoon rainfall. • Increased frequency of localized heavy rainfall on sub-daily and daily timescales has enhanced flood risk over India (high confidence). Increased frequency and impacts of floods are also on the rise in urban areas. • Climate model projections indicate an increase in frequency, spatial extent and severity of droughts over India during the twenty-first century (medium confidence), while flood propensity is projected to increase over the major Himalayan river basins (e.g. Indus, Ganga and Brahmaputra) (high confidence).

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On the Recent Floods in India

Cited by 102 publications

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Increase in Population Exposure Due to Dry and Wet Extremes in India Under a Warming Climate

Increase in Population Exposure Due to Dry and Wet Extremes in India Under a Warming Climate

The 2018 Kerala floods: a climate change perspective

Droughts and Floods

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