Research

Air-SAT

Nano-particles in porous media

The growing use of nanomaterials in the industry over the last decade led to an increased interest in the behavior of NPs in solutions and in the natural environment and the need for efficient tracking methods. In our lab, we investigate the reactive transport of metallic NPs in the soil using geoelectric methods. Implementing these methods allows us to track the movement of NPs in the soil in a noninvasive fashion.

Soil Aquifer Treatment

In Israel, most wastewater is reused after proper treatment. Part of that is done using a unique Soil Aquifer Treatment (SAT) technology. Our efforts in that field are related to better understanding the complex physical, biological, and chemical processes that enhance the process. Specifically, we try to increase infiltration and water quality simultaneously. We combine laboratory and field work with mathematical modeling and geophysical measurements to do that.

Study of root zone dynamics using electrical resistivity tomography

Understanding the basic concepts of root water and nutrient uptake mechanisms is becoming increasingly more relevant, as well as better predicting responses of sensitive ecosystems to global climatic change and better managing agricultural resources under constraints of water limitations and environmental concerns. One of the limitations in studying root zone dynamics is the sensitivity of the processes to the measurement. We apply non-invasive, non-destructive electrical resistivity tomography (ERT) to study the root zone soil water dynamics at various scales, including the high-resolution study of a single root and field scale mapping of wetting patterns under orchards.

Spectral-induced polarization signature of soils

The ability to map soil contamination and its temporal dynamics is the key to protecting and remediating soil and groundwater. In this study, we attempt to identify the unique geo-electrical signature of various contaminant types, including non-aqueous phase liquids, organic and inorganic ionic and non-ionic materials, and more. We also use these techniques to study contaminant degradation processes.

The effect of biological activity on unsaturated soil hydraulic properties

Soil physics was traditionally considering physical processes related to water flow. However, in cases where high organic loads exist (such as contaminated sites), microbial activity activity can lead to the development of extensive biofilms. These, in turn, may significantly alter the soil’s hydraulic properties (conductivity, retention) and alter flow patterns and quantities. Targeting optimal soil remediation, in this study, we combine laboratory experiments and numerical modeling to quantify the changes in soil hydraulic properties induced by microbial activity.

Snow hydrology in temperate regions

Snow in temperate climates has unique characteristics, mostly related to the daily fluctuation of temperature around the freezing point and the relatively high mass and energy fluxes that exist throughout the snow accumulation period. In this experimental study, we study the snow dynamics on Mt. Hermon as a case study for such conditions.