Kaeo River Catchment Flood Risk Assessment and Option Analysis
Stormwater Conference
❄
Kaeo River Catchment located in Northland covers 12,600 hectares of land with a total stream network of 90 kilometres. Flooding of the lower catchment including Kaeo Township has been identified as a significant hazard for many years. Several flood risk reduction mitigation options have been proposed in the past by stakeholders but without any sound technical basis.
The Ministry of Civil Defence and Emergency Management (CDEM) has offered Northland Regional Council (NRC) conditional funding support to help facilitate a longterm solution. One of the conditions is the assistance for Kaeo would be provided in the context of a strategy being developed for long term flood risk by the Northland Regional Council.
NRC, with the assistance of a Kaeo, River Management Liaison Committee, is developing a flood risk reduction/mitigation strategy. This includes development of a floodplain hydraulic model, identification and mapping of the flood hazard and identification and development of potential flood risk reduction options.
The challenge for GHD was to develop a 1D-2D MIKE11/MIKE21 river and floodplain model that provides confidence in the assessment of the flood risk and long term solutions.