Tagged: Groundwater

New Zealand river water quality – good news or bad? - Infrequently Asked Questions

Lynley Hargreaves Aug 11, 2016

Dr Scott Larned Improvements in some components of river water quality are encouraging, but it’s too early to declare victory, says NIWA’s Dr Scott Larned. In a recently published paper in the New Zealand Journal of Marine and Freshwater Research, Dr Larned reported ten-year trends in New Zealand river water quality. He tells us what has improved … Read More

Southern Alps groundwater sheds light on the Alpine Fault - Waiology

Waiology Oct 28, 2014

By Simon Cox During the spring months of 2014, international attention will be drawn to the Alpine Fault along the western side of the Southern Alps, as the Deep Fault Drilling Project (DFDP) enters its second phase. Scientists from around the world aim to complete a 1.5 km drill hole near Whataroa, recover fault rocks for testing, and install … Read More

Understanding groundwater quality – why it’s not easy - Waiology

Waiology Dec 11, 2013

By Chris Daughney and Magali Moreau Groundwater resources are very important for New Zealand. Groundwater supplies about a third of our abstractive water needs and an even greater proportion of the water required by the agricultural sector. There is understandably much concern about groundwater quality, particularly in terms of nitrate. High concentrations of nitrate in groundwater that is used … Read More

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

Un-muddying the Waters: Series on NZ water quality - Waiology

Waiology Oct 14, 2013

By Daniel Collins The state of our waters is a hot button topic. Water quality has become an election issue from Southland to Northland, from towns to nation, and it is often in the news. Swimming water quality and implications of the proposed Ruataniwha water storage and irrigation scheme in Hawke’s Bay are cases in point. Sediment plume from … Read More

Map: Projected effects of climate change on New Zealand freshwaters - Waiology

Waiology Nov 27, 2012

By Daniel Collins Maps are helpful tools in communicating and understanding the potential implications of climate change. We have national maps of projected changes in temperature that show faster warming in the north, and in precipitation that show more rain in the south and west and less in the north and east. We also have national maps of … Read More

Canterbury Lysimeter Network: Measuring the hydrologic inputs to aquifers - Waiology

Waiology Jan 30, 2012

By MS Srinivasan Irrigated agriculture is growing in Canterbury. This growth has resulted in a greater rush for accessing water resources — surface and ground waters – across the region. Since these water resources are finite, limits on their takes are imposed to conserve them and make them available for other uses. However, setting limits on groundwater has remained a … Read More

Kinky relationships among Canterbury’s springs - Waiology

Waiology Jan 23, 2012

By Daniel Collins As Ross mentioned some time ago, one of the frontiers of hydrological research at present is the interface between surface water and groundwater. On the one hand, we need to understand how aquifers are recharged from the surface; on the other, how aquifers in turn discharge water back to the surface. This is important to … Read More

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