Impacts of sea level rise on the Reef. Rising sea levels will be significant because much of the Great Barrier Reef coastline is low-lying. Predictions of a future increase in sea levels are highly variable and range from 0.68m across the Great Barrier Reef Region to a global increase of up to 0.9m by 2100.hanges in sea levels from temperature increases are time-dependent and uncertain, because they are partly linked to the collapse of the Earthâs great ice shelves. Since 1959, records of variations in sea levels for Townsville, in north Queensland, show an average increase of 1.2mm per year.
The earth wire is a crucial part of the home electrical system and is designed to protect against electric shock. If faults occur in the electrical system, the electricity will flow to earth by the shortest and easiest path.
This is the purpose of the earthing transformer, which could consist of a zig-zag winding, or a two winding star delta transformer where the star winding of correct voltage supplies an accessible neutral point when connected to the supply system.ower transformers are three-phase transformers used in the electricity supply system. If the secondary is star (wye) connected, it is necessary to earth (ground) the star poi â¦ nt (neutral point) because an unearthed star point could result in a 'floating neutral', which could cause unbalanced phase voltages.