US water quality expert to speak at science evening in Rotorua

An American water quality expert who has studied and modelled the effects of nutrients in USA lakes will be sharing his knowledge at a public forum in Rotorua on Thursday 20 November.

Dr Dale Robertson will be the special guest speaker at the November Rotorua Te Arawa Lakes Programme Science Evening. The public are invited to attend.

Bay of Plenty Regional Council Lake Operations Manager Andy Bruere said Dr Robertson’s presentation on restoring Delavan Lake highlights the importance of reducing nutrients within a catchment to restore lake water quality.

Excessive nutrient loading to Delavan Lake resulted in the lake becoming hypereutrophic meaning it had low transparency, was rich in nutrients and had severe blue-green algae blooms. Dr Robertson was part of a team which led one of the most extensive rehabilitation efforts conducted on the lake from 1990–1993 to improve the lake’s water quality and fishery.

His team’s efforts successfully reduced nutrients in the lake leading to low algal production and generally much better water quality.

“The insight that Dr Robertson provides from his success with Delavan Lake is invaluable to the Rotorua Te Arawa Lakes Programme,” Mr Bruere said.

 Other research important to the Rotorua Te Arawa Lakes Programme will be shared at the Science Evening. The programme includes presentations about how to farm in an environmentally and economically sustainable way, and on projects that are taking place in Rotorua to monitor local water species such as koura (fresh water crayfish), kakahi (fresh water mussels) and koaro (native fresh water fish).

Research topics and presenters:

The Importance of Biological Interactions in the Long-term Rehabilitation of Delavan Lake, Wisconsin, USA
Dr Dale Robertson, U.S Geological Survey

Making farming sustainable economically and environmentally
Dr Alison Dewes, Headlands, Waikato

Koura and Kakahi monitoring for Ohau Diversion Wall.
Ian Kusabs

Cultural Health project
Alisatair Suren & Wally Lee

Koaro Restoration Project at Hamurana
Gina Mohi & Rikihana Hancock


This post is based on a media statement from the Bay of Plenty Regional Council.  



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