MS, Inorganic and Analytical Chemistry, University of Sofia, Bulgaria
Ph.D., Chemical Oceanography, Florida State University
Courses TaughtGEO 103 Introduction to Oceanography (for non-majors)
GEO 101 The Dynamic Earth
GEO 525 Tracers in Hydrogeology
GEO 525 Isotopic Tracers
Curriculum VitaeDownload File
I am a marine and environmental geochemist who does cross-disciplinary research between coastal oceanography, hydrogeology, and environmental radiochemistry. I combine both geochemical and geophysical tools to answer scientific questions related to my research interests in areas under contrasting morphologic and climatic regimes. Some of my previous experience includes studies of groundwater-surface water interactions in fresh and marine environments in karstic (Florida) and sandy aquifers (San Francisco Bay, California), volcanic areas (Big Island and Oahu, Hawaii),and arctic regions with various permafrost coverage in Alaska.
Specific areas of my research are:
(1) Applications of naturally occurring radioisotopes from the uranium and thorium isotope series as tracers for studying hydrological processes in marine and freshwater systems;
(2) Utilizing electrical resistivity methods for a better understanding of subsurface processes in coastal areas related to the transport of constituents (nutrients and contaminants) into the ocean and the process of saltwater intrusion;
(3) Studying occurrence of natural and artificial radioactivity from radioprotection point of view. Past research projects include the monitoring of natural radioactive contaminations in drinking water, soil, and other natural materials.
An important part of my research has been developing new methods and applications using naturally occurring and man-made radioisotopes. I plan to continue pursuing the radioisotope research and expand the list of radionuclides for new hydrological and geological applications.
Current Research Projects
Coastal Hydrogeology and Hydrology
Research Group Members
Daniel Montiel,Ph.D. candidate, started fall semester 2014
Alexander Lamore (accepted for Fall 2018)
Jackson Stewart (accepted for Fall 2018)
John Ellis (MS, graduated 2013; selected for outstanding MS thesis in 2014 by the Department of Geological Sciences, UA) – Groundwater contribution to coastal nutrient loading along the Gulf Shores of Alabama: groundwater modeling constrained by radon-222 tracer data. (currently Hydrogeologist at the USGS Water Center, Oklahoma)
Nathan Coburn (MS, graduated 2015) – Calibrating a salt-water intrusion hydrological model using geophysical methods along the Alabama Gulf Coast (currently at the US ACE Mobile, AL)
UNDERGRADUATE students with active research
Mark Henry (Geology)
- Compiling large data for building a global submarine groundwater discharge model (in collaboration with Nils Moordorf, Leibniz Center for Tropical Marine Ecology, Germany).
Alexander Lamore (Env. Sciences and Geology)
- Using 222Rn to determine residence time of porewater; 2017 Spring award by the Undergraduate Creativity and Research Academy (UCRA), College of Arts and Sciences, UA
Jackson Stewart (Marine Science/Geology)
- Sediment Transport in the Mobile River Basin, AL
Samuel Walker (Geology)
- Core collection and sediment characterization of the Mobile River Basin, AL.
Lauren Griffith (Political Science with minor in Geology)
- Calibration procedures of HPGe Coaxial Detector System ORTEC
Field and Laboratory Equipment in our Lab
- Duo-chamber Alpha Spectrometer (PIPS)
- High-resolution Gamma Spectrometer (HPGe)
- Liquid Scintillation Counter (LSC)
- Portable radon monitors (RAD7)
- Radium Delayed Coincidence Counters (RaDeCC)
- 56-electrode SuperSting electrical resistivity meter
Our group in the news:
*Montiel, D; N. Dimova; B. Andreo; J. Prieto; J. Garcia-Orellana; and V. Rodellas. Assessing submarine groundwater discharge (SGD) and nitrate fluxes in highly heterogeneous coastal karst aquifers: challenges and solutions (2017), Journal of Hydrology, doi: https://doi.org/10.1016/j.jhydrol.2017.12.036
Rhodes, K.; Proffitt, T.; Rowley, T.; Knappett, P.; N. Dimova; Tebo, D.; Miller, G., *Montiel, D. (2017) Quantifying groundwater discharged to a low-gradient river with high-frequency differential gaging and natural tracers (Water Resources Research, WRR, in press)
Wilson, R.M., L. Fitzhugh, G. Whiting, S. Frolking, M.D. Harrison, N. Dimova, W.C. Burnett and J.P. Chanton (2017). Greenhouse gas balance over thaw-freeze cycles in discontinuous zone permafrost, Journal of Geophysical Research – Biogeoscience, 122, doi: 10.1002/2016JG003600.
Dimova, N., P.W. Swarzenski, J.A. Izbicki, D. O’Leary and P.M. Ganguli (2016). Hydrogeologic controls on chemical transport at Malibu Lagoon, CA: implications for land to sea exchange in coastal lagoon systems, Journal of Hydrology: Regional Studies, (in press)
Kodovska Garcia-Tigreros, F., K. J. Sparrow, S. A. Yvon-Lewis, A. Paytan, N. T. Dimova, A. Lecher, J. D. Kessler (2016). Dissolved Methane and Carbon Dioxide Fluxes in Subarctic and Arctic Regions: Assessing Measurement Techniques and Spatial Gradients, Earth and Planetary Science Letters (EPSL), 436: 43-55.
Swarzenski, P.W. H. Dulaiova, K.D. Kroeger, C.G. Smith, N. Dimova, C.D. Storlazzi, N.G. Prouty, S.B. Gingerich, and C.R. Glenn (2016). Observations of offshore groundwater flow: Kahekili Beach Park submarine springs, Maui, Hawaii, Journal of Hydrology: Regional Studies, (in press)
Xu, B., T. Bianchi, M. Allison; N. Dimova; H. W.; L. Zhang; S. Diao; X. Jiang; Yu Zhen; P. Yao; H. Chen; Q. Y; W. Dong; J. Sui; Z. Yu (2015). Using multi-radiotracer techniques to better understand sedimentary dynamics of reworked muds in the Changjiang River Estuary and inner shelf of East China Sea, Marine Geology, 370: 76-86.
Dimova, N., Paytan, A., Kessler, J. D., Sparrow, K. J., Kodovska, F. G-T., Lecher, A., L., Murry, J., and Tulaczyk, S. (2015). Current magnitude and mechanisms of groundwater discharge in the Arctic: a case study from Alaska, Environmental Science and Technology, DOI: 10.1021/acs.est.5b02215.
Lecher, A., L., Kessler, J. D., Sparrow, K. J., Kodovska, F. G-T., Dimova, N., Murry, J., Tulaczyk, S., and Paytan, A. (2015). Methane transport through submarine groundwater discharge to the North Pacific and Arctic Ocean at two Alaskan sites, Limnology and Oceanography, http://dx.doi.org/10.1016/j.geoderma.2015.04.010
Paytan, A., Lecher, A., L., Dimova, N., Sparrow, K. J., Kodovska, F. G-T., Murry, J., Tulaczyk, S., and Kessler, J. D. (2015). Methane transport from the active layer to lakes in the Arctic using Toolik Lake, Alaska as a case study., Proceedings of National Academy of Sciences, doi/10.1073/pnas.1417392112.
Xu, Bo-Chao, W. C. Burnett, N. T. Dimova, H. Wang, L. Zhang, M. Gao, X. Jiang, Z. Yu (2014), Natural 222Rn and 220Rn Indicate the Impact of the Water-Sediment Regulation Scheme (WSRS) on Submarine Groundwater Discharge in the Yellow River Estuary, China, Applied Geochemistry, doi: http://dx.doi.org/10.1016/j.apgeochem.2014.09.018
Xu, Bo-Chao, W. C. Burnett, N. T. Dimova, G. Liu, T. Mi, Z. Yu (2013), Hydrodynamics in the Yellow River Estuary via radium isotopes: ecological perspectives, Continental Shelf Research, doi.org/10.1016/j.csr.2013.06.018.
Xu, Bo-Chao, N. T. Dimova, L. Zhao, X-Y. Jiang, and Z.-G. Yu (2013), Determination of water ages and flushing rates using short-lived radium isotopes in large estuarine system, the Yangtze River Estuary, China, Estuarine, Coastal and Shelf Science, 121-122, 61–68.
Dimova, N.T., W.C. Burnett, J.P. Chanton, and J.E. Corbett (2013), Application of radon-222 to investigate groundwater discharge into small shallow lakes, Journal of Hydrology, 10.1016/j.jhydrol.2013.01.043
Null, Kimberly A., N.T. Dimova, K.L. Knee, B.K. Esser, P.W. Swarzenski, M.J. Singleton, and A. Paytan (2012), Submarine groundwater discharge-derived nutrient loads to San Francisco Bay: implications to future ecosystem changes, Estuaries and Coasts, doi 10.1007/s12237-012-9526-7.
Burnett, W. C., and N. Dimova (2012), A radon-based mass balance model for assessing groundwater inflows to lakes, Chapter 6 in The Dilemma of Boundaries: Toward a New Concept of Catchment, Global Environmental Studies, M. Taniguchi and T. Shiraiwa (eds.), pp. 55-66, Springer Japan, DOI 10.1007/978-4-431-54035-9_6.
Swarzenski, P.W., C.D. Storlazzi, M.K. Presto, A. E. Gibbs, C.G. Smith, N.T. Dimova, M.L. Dailer, and J.B. Logan, (2012), Nearshore morphology, benthic structure, hydrodynamics, and coastal groundwater discharge near Kahekili Beach Park, Maui, Hawaii: U.S. Geological Survey Open-File Report 2012–1166, 34 p.
Dimova, N.T., P.W. Swarzenski, and H. Dulaiova (2012), Utilizing multichannel electrical resistivity methods to examine the dynamics of the fresh water-seawater interface in two Hawaiian groundwater systems, Journal of Geophysical Research, 117, doi:10.1029/2011JC007509
Smith, C.G., P.W. Swarzenski, N.T. Dimova, J. Zhang, (2011), Natural radium and radon tracers to quantify water exchange and movement in reservoirs, in Handbook of Environmental Isotope Geochemistry, Series: Advances in Geochemistry, vol.1, edited by Mark Baskaran, pp. 345-365, Springer, doi 10.1007/978-3-642-10637-8.
Dimova, N.T., W.C. Burnett, K. Speer (2011), A natural tracer investigation of the hydrological regime of Spring Creek Springs, the largest submarine spring system in Florida. Continental Shelf Research,31, 731-738.
Dimova, N.T. and W.C. Burnett (2011), Evaluation of groundwater discharge into small lakes based on the temporal distribution of radon-222, Limnology and Oceanography, 56 (2), 486–494.
Mwashote B., W.C Burnett, J. Chanton, I.R Santos, N. Dimova, and P.W. Swarzenski (2010), Calibration and use of continuous heat-type automated seepage meters for submarine groundwater discharge measurements, Estuarine Coastal Shelf Science, 87, 1-10.
Dimova, N., W.C.Burnett, and D. Lane-Smith (2009), Improvements in the automated analyses of radon (222Rn) and thoron (220Rn) in water, Environmental Science and Technology, 43 (22), 8599-8603.
Peterson, R., W.C.Burnett, N. Dimova, and I.R. Santos (2009), A comparison of measurement methods for radium-226 on manganese fiber. Limnology and Oceanography: Methods, 7, 196-205.
Santos, I.R., N. Dimova, W.C.Burnett, J. Chanton, B. Mwashote, and R. Peterson (2009), An extended time series for the groundwater tracers 222Rn and CH4 at a coastal site in the Gulf of Mexico, Marine Chemistry, 113, 137-147.
Santos, I.R., W.C.Burnett; J. Chanton, N. Dimova, and R. Peterson (2009), Land or ocean? Assessing the driving forces of submarine groundwater discharge, Journal of Geophysical Research, 114, C04012, doi: 10.1029/2008JC005038.
Dimova, N., H. Dulaiova, G. Kim, and W.C. Burnett (2008),Uncertainties in the preparation of 224Ra Mn fiber standards. Marine Chemistry, 109 (3), 220-225.
Burnett,W.C., N. Dimova, H. Dulaiova, D. Lane-Smith, B. Parsa, and Z. Szabo (2007), Measuring thoron (220Rn) in natural waters, in “Environmental Radiochemical Analysis III”, edited by P. Warwick, pp. 24-37, Royal Society of Chemistry, RSC Publishing, Cambridge.
Dimova, N., W.C. Burnett, E.P. Horwitz, and D.L. Smith (2007), Automated measurement of 224Ra and226Ra in water, Applied Radiation and Isotopes, 65, 428–434.
Swarzenski, P. W., W.C. Burnett, W.J. Greenwood, B. Herut, R. Peterson, N. Dimova, Y. Shalem, Y.Yechieli, Y.Weinstein (2006), Combined time-series resistivity and geochemical tracer techniques to examine submarine groundwater discharge at Dor Beach, Israel, Geophysical Research Letters, 33, L24405, doi:10.1029/2006GL028282.
Dimova N., B. Veleva, L. Kinova (2005), Radium isotope determination in rock samples using alpha spectrometry. University of Mining and Geology “St. Ivan Rilski” Annual reports.
Dimova N., L. Kinova, B. Veleva, B. Slavchev (2003), Radiochemical procedures for determination of naturally occurring uranium isotopes in environmental samples. 50 years University of Mining and Geology “St. Ivan Rilski”, Annual reports, vol. 46, part І, Geology and Geophysics, Sofia: 241-246.
Kinova, L., P. Nikolov, T. Peneva, A. Nikoforova, N. Dimova, B. Slavchev, and P. Petrova (2002), Investigation on TNORM uranium contaminated soils. International Science Conference in honor of prof. Dimitar Yaranov, Conference Proceedings, 2: 336-345. (in Bulgarian)
Nikolov, P., T.Grigorov, A. Nikoforova, L. Kinova, T. Peneva, N. Dimova, B. Salvchev, I. Vartolomeev, R. Valchev, and I. Iliev (2002), Critical assessment of the sampling points in the monitoring of gas-aerosol fall outs of the WWER 440 at NPP Kozloduy, Bulgaria, Nuclear Energy Symposium, Conference Proceedings, vol. 1, 344-350. (in Bulgarian)