UNDERWATER electrical streamer discharges have been
widely investigated as advanced oxidation processes in
water or wastewater treatment [1]–[5]. In a pulsed streamer
discharge, chemically reactive radicals such as H, O, and OH
and molecular oxidants such as H2O2 and O3 are generated [6].
These chemically reactive species can react with the organic
pollutants contained in the water and degrade them into harmless
by-products [7]. Since the chemically reactive species