poornima

Dr. Poornima Unnikrishnan

Research Associate, Marine Geoscience Group

Email : This email address is being protected from spambots. You need JavaScript enabled to view it.

Phone(Off) : 0471-2511712

Fax : 0471-2442280

Education:

Ph. D. : 2018, Water Resources Engineering, Indian Institute of Technology Bombay, India.
Thesis : Hydrologic Time Series Analysis and Forecasting using Singular Spectrum Analysis.
M Tech. : 2014, Water Resources Engineering, Indian Institute of Technology Bombay, India.
B Tech. : 2012, Civil Engineering, College of Engineering Trivandrum, University of Kerala, India.

Professional career:

2019 (Nov) - Present Research Associate, National Centre for Earth Science Studies (NCESS), Thiruvananthapuram.
2019 (Jul) - 2019 (Nov) Adhoc Faculty, Department of Civil Engineering, National Institute of Technology Calicut, Kerala.
2018 (Jul) - 2018 (Dec) Adhoc Faculty, Department of Civil Engineering, National Institute of Technology Calicut, Kerala

Research Interest:

Hydrologic time series modelling, Surface water and ground water modelling, Submarine Groundwater Discharge, Hydro informatics, Artificial Intelligence in Water Resources Systems, Statistical modelling, Watershed Hydrology.

Achievements and Awards:

  • Prof U.C Kothyari Best PhD thesis 2019 award presented by Indian Society for Hydraulics.
  • Secured a percentile score of 98.8 in Graduate Aptitude Test in Engineering (GATE) 2012.
  • Secured 4th rank in B Tech, University of Kerala.

Publications/ Technical Report/ Other Articles:

  • Unnikrishnan Poornima and Jothiprakash V (2018) “Selection of window length in Singular Spectrum Analysis of a time series” Nonparametric Statistics, Springer Proceedings in Mathematics & Statistics 250, P. Bertail et al. (eds.), https://doi.org/10.1007/978-3-319- 96941-1_21
  • Unnikrishnan Poornima and Jothiprakash V (2020). Hybrid SSA-ARIMA-ANN Model for Forecasting Daily Rainfall. Water Resources Management 34, 3609 - 3623.
  • Unnikrishnan Poornima and Jothiprakash V (2018) “Forecasting daily rainfall for one year in a single run using Singular Spectrum Analysis” Journal of Hydrology (561) 609-621; url: https://doi.org/10.1016/j.jhydrol.2018.04.03211
  • Unnikrishnan Poornima and Jothiprakash V. (2015). "Extraction of Nonlinear Rainfall Trends Using Singular Spectrum Analysis." Journal of Hydrologic Engineering 20 (12).url:https://doi.org/10.1061/(ASCE)HE.1943-5584.0001237
  • Unnikrishnan Poornima and Jothiprakash V (2018) “Data Driven Multi Time Step Ahead Daily Rainfall Forecasting Using Singular Spectrum Analysis based Data Pre-Processing” Journal of Hydroinformatics 20 (3) 645-667; DOI: 10.2166/hydro.2017.029
  • Unnikrishnan Poornima and Jothiprakash V (2019) “Noise Identification and Elimination from Meteorologic Data using Singular Spectrum Analysis”, Fall Meeting 2019, American Geophysical Union, San Francisco, United States of America.
  • Jothiprakash V and Unnikrishnan Poornima (2018), “Singular Spectrum Analysis in Hydrologic Time Series Modelling” International Conference on Changing Paradigms and Emerging Challenges in Statistical Sciences (IPECS-2018), Pondicherry, India.
  • Unnikrishnan Poornima and Jothiprakash V (2017), “Daily Rainfall forecasting using Artificial Neural Networks: A case study” presented at the December 2017 Virtual Poster Showcase, American Geophysical Union, Washington, DC.
  • Unnikrishnan Poornima and Jothiprakash V(2017), “Trend Analysis of Daily and Monthly Rainfall Time Series using Mann Kendall Test” Presented at the May 2017 Virtual Poster Showcase, American Geophysical Union, Washington, DC.
  • Zeleňáková, M., Jothıprakash, V., Purcz, P., Unnikrishnan Poornima., Hlavatá, H., (2017)," Investigation of precipitation trends in eastern Slovakia using singular spectrum analysis", in: 15th International Conference on Environmental Science and Technology. Rhodes, Greece.
  • Unnikrishnan Poornima and Jothiprakash V (2017) “Long Term Precipitation Pattern Identification and Derivation of Non-Linear Precipitation Trend in a Catchment using Singular Spectrum Analysis” EGU General Assembly 2017, Vienna, Austria.
  • Unnikrishnan Poornima and Jothiprakash V (2016) “On selection of window length in Singular Spectrum Analysis of a time series” 3rd conference of International Society of Non-Parametric Society (ISNPS), Avignon, France, 11-16 June 2016.