Dr. VIKAS POONIA

 


Brief Details:

Dr. Vikas Poonia is a Postdoctoral Fellow at the Indiana University-Purdue University Indianapolis (IUPUI), Indiana, USA where my research focuses on extreme events, particularly to develop a novel approach to define flash drought and conduct flash drought investigation to examine flash drought occurrence, distribution, drivers, and trends as well as their impact on the crop production and irrigation demand over 25 river basins across India.

A large part of my doctoral research focuses on the analysis of joint drought events using advanced statistical and probabilistic techniques and with the concurrence and evolution of all major drought types.  My past and current research have been mainly focused around two broad points. First, to understand the behavior of meteorological, hydrological, and agricultural drought events in terms of occurrence, trend, concurrence, evolution, and joint dependence of droughts characteristics; second, to investigate flash drought and their impact on the regional terrestrial ecosystem over Indian river basins.

I have published 9 research articles, and 2 manuscripts are under review in reputed journals. I have also published 5 book chapters in Springer. I also received the SYSTA: Sivapalan Young Scientists Travel Award from the International Association of Hydrological Sciences (IAHS), Italy. Moreover, I also received the Young Scientist Award and Best paper award at international conferences during his doctoral research. 

Research

In this research presentation, I will discuss my latest work related to Flash droughts over India (Published in Journal of Hydrology).

Rapid onset droughts, termed as “flash droughts”, cause short-term but serious threats to terrestrial ecosystems and influence carbon dynamics due to insufficient warning. To date, how the regional terrestrial carbon dynamics respond to flash droughts in India remains unknown. Since, India is highly dependent on its cropland and vegetation, identifying the influence of flash droughts on terrestrial ecosystem is important. Here we use MODIS remote sensing satellite sensor based gross primary productivity (GPP) and remote sensing-based soil moisture data to compute the response of ecosystems to flash droughts in India. From the investigation, it was observed that GPP responds to more than 95% of the flash droughts across India, with the highest response frequency occurring over Ganga basin and southern India while the lowest response across northeastern India. The discrepancies in the response frequencies are mainly attributed to different vegetation resilience conditions across different parts of the country. Severe reduction in water use efficiency (WUE) was observed for the Ganga river basin and some parts of southern India, which highlighted the non-resilient nature of ecosystem towards rapid soil moisture variations. The study facilitates the identification of flash drought hotspots in the country, and the ability of an ecosystem to withstand such drastic conditions.

Teaching: 

In this teaching presentation, I will discuss some fundamentals of Hydrographs as:

1. Discuss Flood Hydrograph and its different sections.

2. Factors affecting Hydrograph.


Google Scholar Link:

https://scholar.google.com/citations?user=Ede3YxgAAAAJ&hl=en

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