6 datasets found

  • Flood Protection Stopbank

    Gisborne District Council
    Stopbanks are continuous mounds of earth built near rivers to stop water from the river flooding nearby land. Americans call them levees. They may look like grassy banks, but they are actually constructed according to very specific engineering designs. When the river is in flood, they need to be able to contain the floodwaters without collapsing.
    Created 9 December 2019 • Updated 3 March 2020

  • Additional Flood Zones (Non-Plan)

    Gisborne District Council
    Known flooding areas throughout the Gisborne district that are not part of the official Tairawhiti Resource Management Plan flood zones.
    Created 9 December 2019 • Updated 3 March 2020

  • Coastal Flooding

    Gisborne District Council
    Gisborne District Council (GDC) is required to identify areas in the coastal environment that are potentially affected by coastal hazards, over at least 100 years, as required by the New Zealand Coastal Policy Statement (NZCPS) (DoC 2010). In 2014 NIWA developed a Coastal Calculator to derive coastal-storm inundation elevations and likelihoods as a result...
    Created 9 December 2019 • Updated 3 March 2020

  • Flood Hazard Areas

    Gisborne District Council
    Flood hazard assessments have been carried out for several areas in the District. These include the Poverty Bay Flats, Gisborne urban area, and the Mangatuna/ Wharekaka Area for the Hikuwai/Uawa River. The flood hazard varies across liable areas. Generally towards the edge of the flooded area depths are shallow and floodwaters move at slow speeds....
    Created 9 December 2019 • Updated 3 March 2020

  • Additional Flood Zones

    Gisborne District Council
    The East Cape has a history of “hits” from decaying tropical cyclones causing widespread flooding and disruption. There are also other events that are more localised and result from a weather system dumping a large volume of water in a small area. A recent study showed that there is a trend of less of these events, but when they occur more rain falls....
    Created 9 December 2019 • Updated 3 March 2020

  • District Plan Flood Zones

    Gisborne District Council
    The East Cape has a history of “hits” from decaying tropical cyclones causing widespread flooding and disruption. There are also other events that are more localised and result from a weather system dumping a large volume of water in a small area. A recent study showed that there is a trend of less of these events, but when they occur more rain falls....
    Created 9 December 2019 • Updated 3 March 2020
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