• Vadose zone hydrology
• Groundwater recharge
• Land-use impact on water resources quality
• Remediation of contaminated sites
• Contaminant transport
• Soil monitoring technologies

Scientific Publications 2015-2020
1) Dahan, O. (2020). Vadose-zone Monitoring as a Key to Groundwater Protection. Frontiers in Water
2) Levakov, I., Han, J., Ronen, Z. and Dahan, O., (2020). Inhibition of perchlorate biodegradation by ferric and ferrous iron. Journal of Hazardous Materials.
3) Aharoni, I. Siebner, H. Yogev, U. Dahan, O. (2020). Holistic approach for evaluation of landfill leachates pollution potential – from the waste to the aquifer. Science of the Total Environment.
4) Weissman, G. Bel, G. Ben‐Gal, A. Yermiyahu, U. Alexandrov, B. Rasmussen, K. Dahan, O. (2020) Increased irrigation water salinity enhances nitrate transport to deep unsaturated soil. Vadose Zone Journal.
5) Yeshno, E. Arnon, S. Dahan, O., 2019. Continuous in-situ monitoring of nitrate concentration in soils - a key for groundwater protection from nitrate pollution. Hydrol Earth Syst Sci.
6) Levakov, I., Zeev, R., and Dahan., O., 2019. Combined in-situ bioremediation treatment for perchlorate pollution in the vadose zone and groundwater Journal of Hazardous Materials. Journal of Hazardous Materials.
7) Moshkovich, E., Ronen, Z., Gelman, F. and Dahan, O., 2018: In-situ bioremediation of a gasoline-contaminated vadose zone: implications from direct observations. Vadose Zone Journal.
8) Dahan, O., Katz, I., Avishai, L., and Ronen, Z., 2017: Transport and degradation of perchlorate in deep vadose zone: implications from direct observations during bioremediation treatment. Hydrol. Earth Syst. Sci.
9) Aharoni, I., H. Siebner, and O. Dahan. 2017. Application of vadose-zone monitoring system for real-time characterization of leachate percolation in and under a municipal landfill. Waste Management.
10) Vera, N. F. De, Beaujean, J., Hakoun, V., Caterina, D., Dahan, O., Vanclooster, M., Dassargues, A., Nyugen, F. and Brouyère, S. 2016: Tracer Experiment in a Brownfield Using Geophysics and a Vadose Zone Monitoring System. Vadose Zone Journal.
11) Avishai, L., Siebner, H., Dahan, O. and Ronen, Z. 2016. Using the natural biodegradation potential of shallow soils for in-situ remediation of deep vadose zone and groundwater. Journal of Hazardous Material.
12) Ronen-Eliraz, G., Ginat, H., Dody, A., Blumberg, D., & Dahan, O., 2016. Flood hydrograph reconstruction from the peak flow value in ephemeral streams using a simplified robust single-parameter model. Hydrological Processes.
13) Turkeltaub, T., Kurtzman, D., and Dahan, O.2016: Real-time monitoring of nitrate transport in deep vadose zone under a crop field – implications for groundwater protection, Hydrol. Earth Syst. Sci.
14) Kurtzman, D., Baram, S., and Dahan, o., 2016. Soil–aquifer phenomena affecting groundwater under vertisols: a review. Hydrol. Earth Syst. Sci.
15) Turkeltaub, T., Kurtzman, D., Russak, E. E. and Dahan. O., 2015. Impact of switching crop type on water and solute fluxes in deep vadose zone. Water resources Research.
16) Turkeltaub, T., Kurtzman, D., Bel, G., Dahan, O., 2015. Examination of groundwater recharge with a calibrated/validated flow model of the deep vadose zone. Journal of Hydrology.

Patents
• Flexible Probe for Measuring Moisture Content in Soil. 2002 (USA, Patent #956,381).
• Deep vadose zone sampling ports. 2006 (US 12/222,069; EP 07706061.4; IL 193126).
• In-situ measurement of nitrate in soil. 2017 (PCT 11-158).
• Electro optics method to measure nitrate concentration in water mixed with DOC. 2019 (PCT 62/860,273).

Recent projects
2020-2023: Combined bioremediation of soil and groundwater polluted with perchlorate. Israel Ministry of Science & Technology. Ofer Dahan, Zeev Ronen. (799,250 ILS).
2018-2019: Development of a novel approach for continuous measurement of nitrate concentration in soil. Israel Innovation Authority. Ofer Dahan, Shlomi Arnon, Kobi Inbar. (ILS 400,000).
2018: Novel sensors for real-time in-situ measurement of nitrate in soil as a key to optimization of nutrient application efficiency and water resource protection from pollution hazard. Marcus foundation. Ofer Dahan, Shlomi Arnon ($25000).
2016-2018: Direct measurements of infiltration rates and transport of oil components above and below the surface of the braided channels of the Evrona Nature Reserve during flood events. Israel Ministry of Environmental Protection (ILS 350,000). Ofer Dahan, Jonathan Laron
2016-2019: Pollution potential of municipal landfills – Comparison between mound and quarry landfills. Israel Water Authority (ILS 395,000). Ofer Dahan, Hagar Ziebner.
2016-2018: Integrated knowledge on the root zone as key to promotion of modern agriculture. (MOAG-MOE), cooperation of 25 researchers from various disciplines in plant physiology, microbiology, and hydrology (12,000,000 NIS).
2016-2017: The implication of rainfall-runoff-infiltration relations in terraced first order streams in southern Judea Mountain on groundwater recharge of the Yarqon- Taninim aquifer. MOST. Ofer Dahan (BGU), Naama Avramov (JRRDC), and Roy Egozi (MOAG). (360,000 ILS).
2015-2018: Reducing Nitrate flux to groundwater from agricultural fields underutilization of desalinated water and application of advanced methods for treating nitrate in well water. Ministry of Agriculture, Cooperation with Daniel Kurtzman, Asher Bar Tal, David Ruso, Edi Sitrin, Alon Ben Gal, Uri Yermiyahu, Shabtai Cohen, Zion Dar, Asher Izenkot, Yoram Aizenshtadt, Beni Lev. (2,695,750 NIS).
2018-2020: Study of the underground hydraulic connection in water harvesting systems and its effect on the water regime in Shagririm Forest. KKK-JNF. Ofer Dahan, Hagar Zibner, Adit Arazi. (ILS 496,800).

​​​ORCID: 0000-0001-9119-8451​