Irrigation waters of the Bundaberg area

The underground irrigation water supplies of the Bundaberg area have been divided into three classes based on the overlying geological formation. The topography and soil characteristics of the two principal land types below which main water-bearing beds are located are briefly discussed. A number of waters from each of the three geologic areas have been analysed and their compositions compared, particularly on the basis of ionic ratios. Tables of typical irrigation plant data are appended

Ionization Rate, Temperature, and Number Density for Breakdown Waves with a Large Current Behind the Shock Front

A three component, one-dimensional, constant velocity, steady-state fluid model is employed to describe the breakdown waves with a current behind the wave front propagating into a neutral gas subjected to an external electric field. Electron gas partial pressure is much larger than that of the other species and therefore is considered to provide the driving force for the wave. The system of equations includes the equations of conservation of mass, momentum, and energy coupled with Poisson’s equation. Inclusion of current behind the wave front in the system of fluid equations also alters the initial boundary conditions and ionization rate. We are considering an ionization rate which changes from accelerational ionization at the front of the wave to directed velocity ionization in the intermediate stages of the wave to thermal ionization at the end of the wave. Using the modified boundary conditions, the set of electron fluid dynamical equations have been integrated through the dynamical transition region of the wave. The effect of current behind the shock front on the wave profile for electric field, electron velocity, ionization rate, electron number density, and electron temperature will be presented