Discharge propagation in water in non-uniform field

The optic observation results of the impulse discharge propagation in the deionized water 2-8 cm gaps formed by point and plane electrodes are described. The formation of weekly conducting and weekly luminous but scattering laser beam matter at the point always preceded the positive discharge channels development. The matter nature isn´t identified. Continuous and discrete forms of the discharge channels propagation and transition from one to another are founded. Flashes of the discrete propagating main channels were stipulated by the thin lower conductivity channels growth, which form a bush(brush)-like structure. The diameters and conductivity of the channels, the charge carriers concentration and mobility into them have been estimated. The considerable differences of the positive and negative channels development speed (V₊/V_-) and the electrical strengths of water (E_-/E₊) are connected with effective electron trapping