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The town of Katherine has experienced significant flooding a number of times in the past, including in 1931, 1940, 1957, 1998 and 2006.
The Katherine Region Flood Mitigation Advisory Committee was formed in January 2015 and were tasked to provide recommendations to mitigate the impact of flooding in the Katherine region.
The committee released its final report in August 2015 and is no longer active.
Flooding in the Katherine region
The Katherine catchment is quite complex, with the actual impact of flooding not only dependent on the volume and duration of a stormwater event, but also in which parts of the catchment the event take place.
The existing flood maps for the Katherine region were developed by the Department of Land Resource Management (DLRM) in 2005. The new hydraulic flood models for the broader Katherine catchment commissioned by the committee will enable more effective testing of flood mitigation options. The flood modelling, including new aerial topographic mapping, may take 6 to 8 months to develop.
Flood mitigation options that can be tested by modelling may include levee banks, improved trunk drainage systems and stormwater detention basins.
For information on the range of structural and non-structural flood mitigation options, read what is flood mitigation.
As an immediate action following the first committee meeting, revised options for a new commercial centre and relocation of the ambulance centre, as part of the Katherine Land Use Plan will be presented at the March 2015 committee meeting
The development of a second commercial centre may be further investigated and construction of infrastructure including land subdivision, service infrastructure to support the new centre and the Katherine East by-pass road to Chambers Drive to assist emergency vehicles to move within Katherine may support the long term flood mitigation.