Tagged: nitrate

Nitrate in Canterbury groundwater - Waiology

Waiology Nov 27, 2013

By Carl Hanson Nitrate concentrations in Canterbury groundwater have been prominent in the media recently. Headlines have included phrases like “ticking time bomb”, “scaremongering” and “freaking out much of Canterbury”. What I want to do in this article is to present the state of nitrate concentrations in Canterbury groundwater, and the trends we see in those … Read More

Monitoring the diversity of NZ groundwater quality - Waiology

Waiology Nov 18, 2013

By Magali Moreau, Chris Daughney and Zara Rawlinson To date, more than 200 aquifers have been mapped across the country. These aquifers vary widely in their volumes, depths, host-rock lithologies, related geological structures, water circulation pathways and water age. Our knowledge of the individual characteristics of these aquifers grows as we gather more data through our active monitoring networks. Read More

The use of dicyandiamide (DCD) to control nitrogen pollution in NZ - Waiology

Waiology Jan 25, 2013

By Bob Wilcock For the last 20 years New Zealand has been undergoing a rapid expansion in dairy farming, driven by commodity prices. New Zealand’s dairy exports, although small on a global scale of production, comprise 30-40% of internationally traded dairy products and are a major component of our gross domestic product (roughly 3%). Dairy farming is an intensive form … Read More

Recent NZ research from climate change to tussock | Journal of Hydrology (NZ): 50(2) - Waiology

Waiology Nov 24, 2011

By Daniel Collins For those of you who don’t receive New Zealand’s own hydrology journal, or for those who want to save some time, here’s an overview of this month’s edition — the journal’s 100th. 1. Barry Fahey (Landcare Research) et al. use their water balance model, WATYIELD, to assess whether tussock in Otago’s uplands can really intercept … Read More