[en] Generation of zonal flows in toroidal plasma is a focus of active research in recent years. Zonal flows are turbulence-generated poloidally symmetric low-frequency potential structures, which can play an important role in the turbulence self-regulation. In such a system drift wave turbulence non-linearly generates zonal flows, which in turn modulate the drift wave amplitude and control the turbulence level through the random shearing process. Turbulent transport also appears to be modulated, exhibiting bursts as it has been demonstrated in simulations, theory and experimentally. Zonal flow-like structures have recently been observed in the H-1 heliac. It has been demonstrated that these structures, seen as low frequency fluctuations in the plasma potential which have zero poloidal wave numbers k_θand finite radial wave numbers k_r, (k_r >> k_θ ∼ 0), are generated through a 3-wave interaction process in various modes of confinement in the H-1 heliac. Fluctuations in the low confinement mode in H-1 have been identified as unstable pressure-gradient-driven modes, which drive substantial radial flux of particles, thus affecting the plasma confinement. It has been discovered recently that the fluctuation-driven transport in H-1 is non-ambipolar, in other words, electrons are transported radially by fluctuations ∼ 10 times more efficiently than ions, which results in the fluctuation-driven radial current. This current is capable of significantly modifying the radial electric field, and through it, the particle confinement, which has been demonstrated in the H-1 experiments. Since fluctuations generate zonal flows and zonal flows change the radial electric field in the plasma, which has been found to be the most essential ingredient in the confinement bifurcations observed in H-1 it is important to investigate the generation of zonal flows and their role in confinement jumps in various plasma conditions. In this paper experimental results on the generation of zonal-flow-like structures in various confinement modes are presented. Copyright (2002) Australian National University- Research School of Physical Sciences and Engineering