A cost-effective water level recorder. Comprises a water surface float-driven shaft encoder and internal data logger with rainfall input. Connects directly to compatible communications devices.

Back in April 2007, the  Pōhatuiri Marae Trust decided to rebuild there marae near Waitomo. The trust approached NIWA about renewable energy solutions for providing electricity. We asked “electricity for what?”, and so began an interesting learning process. A particularly relevant observation was the older (and often more self reliant) solutions to energy, waste management and water, should not be over-looked.

In recent years, the New Zealand pig industry has been seeking solutions to odour emissions from open waste stabilisation ponds. One of the solutions is to integrate anaerobic digestion with biogas recovery into the effluent management system. A recent example is Taranaki pig farmer Steve Lepper.  
Steve wanted to reduce the odour emissions from the waste management system of his 450 sow farrow-to-finish piggery.
Odour minimisation was achieved by installing a custom designed covered anaerobic pond up front of the existing open waste stabilisation ponds.

"It’s not rocket science, says Niwa’s Rupert Craggs.  Recently he and a few others demonstrated how easy it is to produce electricity from the biogas that comes off farm effluent ponds, using a converted generator.
“We plugged in two fan heaters, three spotlights and a 3 phase motor – and they ran for over two hours.  At full throttle it generates 13kW, we were running it at nine or ten.”
Such technology is not novel, he says.  “Most large domestic wastewater treatment plants capture biogas.  For example, they do it here in Hamilton and

Solarview, a free web-based tool from NIWA, helps you get the most out of your house.

World’s largest wastewater algae to bio-crude oil demonstration puts CO2 to good use.

Pole-to-pole flights provide a global picture of greenhouse gases: this month a team of international scientists will fly from the Arctic to the Antarctic aboard an exceptional jet.

A world leading research project demonstrating wastewater conversion to bio-oil.

Eastern Hutt School brings solar energy and science to life with help from the Schoolgen programme and Genesis Energy.

NIWA and IBM today announced a multi-million dollar partnership where NIWA will purchase one of the world’s most powerful supercomputers for use in environmental forecasting.

To inform their forthcoming Strategic Plan, Te Wai Māori Trust commissioned a review of our current understanding of freshwater taonga species (biology, ecology, management, monitoring and research needs) including tuna, piharau/kanakana, kōura/kēwai, whitebait, porohe, kanae, pātiki mohoao, and kākahi/kāeo. This is the first time such a stocktake has been undertaken since the publication of Dr Bob McDowall's New Zealand Freshwater Fishes – a guide and natural history in 1978.

Rilke de Vos, Warrath Piggeries, Lepper Trust, Pork Industry Board
Understanding the complexity of tidal resources in New Zealand’s coastal waters and examining how extracting tidal energy would influence and be influenced by this variability.

This project will demonstrate the commercial feasibility of producing bio-oil by the conversion of algae biomass that has been grown in wastewater treatment facilities. In particular we aim to maximise algae production in High Rate Algal Ponds (HRAP) by adding carbon dioxide, and demonstrate energy efficient conversion of algal biomass to bio-oil.

This two-year Waikato River Authority funded collaborative project between Horahora and Te Poho o Tanikena Marae, Waikato Raupatu River and Land Trusts and NIWA will install constructed wetlands at two Waikato-Tainui marae to improve wastewater management. These marae-scale integrated constructed wetland systems will provide a showcase for this low cost eco-technology, and ultimately contribute to improving the health and wellbeing of the Waikato River.

  Hydrogen Issues Document.


Page of EnergyScape deliverables

Relationships between EnergyScape (parent) and sub-projects

Introduction to the project

If you want to understand the technologies, resources or end-use options that New Zealand can embrace in the quest to maintain “nature’s paradise” whilst achieving economic transformation, then the EnergyScape project could interest you.
In order to support New Zealand’s quest to maintain a very high quality of life, our government planners and regulators need smart tools to help them negotiate the impacts of policies that affect the balance between energy security, environ

A uniquely ‘Kiwi’ wave energy generator is harnessing the power of waves in Evans Bay Wellington.

Low hydro inflows: it's La Niña

Sustainable energy for rural communities: what does it take?

The "Carbon Workshop 2008: Global Cycle to Regional Budget" will be held at the National Library Auditorium, Wellington on 14 and 15 April 2008.

Gerris software makes the finals

Gerris software makes the finals

Dr Stéphane Popinet, developer of Gerris open source software. (Photo: Alan Blacklock, NIWA)

Gerris software, written by NIWA’s Dr Stéphane Popinet, was recently a finalist in the inaugural New Zealand Open Source Awards. The awards were judged by an international panel, and sponsored by Google.
Gerris is a tool based on fluid dynamics which simulates complex wind patterns.

Biogas research takes another step

The pond cover incorporates methane-extracting pipes running underneath the cover around the edge. (Photo: Stephan Heubeck, NIWA)

NIWA research into biogas recovery from farm animal waste has taken another step forward with the successful design and installation of a cover for a large piggery effluent pond, and subsequent capture of methane produced by the pond.
A 1200-pig fattening unit in the Waikato had to control odour as part of its new resource consent conditions. NIWA’s Dr Rupert Craggs designed a 3000 m2 polypropylene cover for the pond.


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