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Flood warning Rainfall Prediction (Canterbury Headwaters) More Info

Glossary

  • Gasworks
    between the late 1800s and 1988 gasworks were a familiar sight in towns and cities throughout New Zealand. During this time, the production of gas from coal was a major source of fuel for heating, cooking and lighting. Ref: MfE 1997: Guidelines for Assessing and Managing Contaminated Gasworks Sites in New Zealand.
  • Gauging
    measuring a river's width, depth and velocity.
  • General Rate
    a rate levied across all properties for activities that benefit the whole region.
  • Geopreservation sites
    include the best examples of the wide diversity of physical features and processes that together characterise each part of Canterbury and document its long and complex geological history, the formation of its landforms and evolution of its unique biota.
  • Georeferencing
    the process of assigning map coordinates to image data and resampling the pixels of the image to conform to the map projection grid (ERDAS Field Guide 2005).
  • Grants
    grants to Environment Canterbury are available from central Government and statutory organisations where there are national benefits or the grants are part of a policy to promote a particular activity or project.
  • Greenhouse effect
    (see climate change) the enhanced greenhouse effect, caused by increased carbon dioxide, methane and other gases being trapped in the upper atmosphere, may be a contributing factor to future climate change.
  • Greenhouse gas
    a constituent of the atmosphere, both natural and anthropogenic, which absorbs and re-emits infrared radiation. Important greenhouse gases include carbon dioxide, methane and nitrous oxide. Read more about climate change.
  • Groundwater
    freshwater contained in aquifers (water-bearing layers) below ground.
  • Group of activities
    one or more related activities provided by, or on behalf of, Environment Canterbury.
  • Groynes
    banks built out from stopbanks to deflect flows away from stopbanks. Groynes extend into the river channel and are usually armoured at the river end.