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Lake Ngaroto Past and Present

Lake Ngaroto Past and Present. Where. History. Cadastral Map dated late 1800’s early 1900’s. Ngaroto in the 1960’s. Lake Outlet. Lake Ngaroto Water Level Monitoring from 2003 - 2010. Lake Ngaroto 1980s. Lake Ngaroto at 2007. Lake Ngaroto: Water Quality Monitoring. Parameters Measured

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Lake Ngaroto Past and Present

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  1. Lake NgarotoPast and Present

  2. Where

  3. History

  4. Cadastral Map dated late 1800’s early 1900’s

  5. Ngaroto in the 1960’s

  6. Lake Outlet

  7. Lake Ngaroto Water Level Monitoring from 2003 - 2010

  8. Lake Ngaroto 1980s

  9. Lake Ngaroto at 2007

  10. Lake Ngaroto: Water Quality Monitoring Parameters Measured • Water temperature • Dissolved Oxygen • Algae in the water column • Rainfall

  11. Lake Ngaroto: Council / Community Goals • Retain and enhance the recreational opportunities • Access to and around the lake • Maintain or increase lake depth • Improve water quality • Retain and restore indigenous biodiversity • Control mammalian pests and introduced weeds • Adopt a more natural water level management regime that will improve marginal habitats • Preserving and promoting the history associated with the Lake and it catchment • Protecting the on site features and artefacts • Providing quality Interpretation

  12. Actions Taken and Proposed Repair the circuit track and board walk / bridges Control willows to encourage more favourable indigenous species to colonise the margins (treatment started within southern sector) Replace collapsing manuka stand with more suitable species Ramp up the control of aggressive weeds Complete the application to renew the resource consent to operate the weir on the lake outlet

  13. Actions Proposed • Control pest fish – koi, bullhead catfish, rudd and goldfish • Control mammalian pests – possums, cats, ferrets, stoats and rats • Acquire those areas of private land that are inundated when lake levels rise – approx. 22ha • Re-route inflows from Ngaroto-iti to lake outlet • Interpret the swamp Pa and other significant features around the lake • Improve the Domain – infill / consolidate the low lying area; retain the lake edge in front of the Domain to prevent erosion ; reinstate the boat ramp by the rowing sheds • Reduce inflow of nutrients to the lake by assisting landowners to change / modify farm management practises

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