SciBlogs

NIWA revising national flood statistics Waiology Jul 16

By Daniel Collins As we have seen in Northland in recent days and in Christchurch in March, severe floods pose a significant threat to rural and urban lives and livelihoods. One person drowned in the Waitangi River on Saturday, and the cost of the flooding will likely be in the millions. As a point of [...]

Reviews coming in on new policy for freshwater management Waiology Jul 11

By Daniel Collins The Government recently released the National Policy Statement for Freshwater Management (2014). The policy provides the most comprehensive instructions to regional councils yet on how our freshwaters – rivers, lakes, wetlands, and aquifers – are to be managed. Amendments made in the new policy include numerical thresholds and bottom-lines for a range [...]

New ID key reveals freshwater invertebrates of Campbell Island Waiology Jul 09

By Shelley McMurtrie New Zealand’s subantarctic islands are a UNESCO World Heritage site of unparalleled beauty and outstanding natural values. One of these islands—New Zealand’s most southern landmass Campbell Island—is home to several globally rare species including its unique and colourful megaherbs, and one of the largest colonies of royal albatross. With an ever-increasing need [...]

Using models to understand and protect our braided rivers Waiology Jun 23

By Murray Hicks Braided rivers, defined by networks of channels that are forever changing and shifting, are iconic features of the New Zealand landscape. Their existence depends on abundant supplies of gravelly sediment and frequent disturbance by floods and freshes. They also support unique communities of in-stream and terrestrial organisms (fish and birds) that have [...]

Citizen scientists help map Christchurch flooding Waiology Jun 16

By Daniel Collins The Christchurch earthquakes of 2010-2011 had a disastrous effect on Christchurch and its residents. But one effect could not be known until much later – flooding. The earthquakes changed the height of the ground across the city, raising or dropping the land by several 10s of centimetres in places. This meant that [...]

New Zealand’s native freshwater fish are becoming increasingly threatened Waiology Jun 06

By Jane Goodman New Zealand’s native freshwater fish are becoming increasingly threatened The conservation status of New Zealand freshwater fish was assessed in June 2013 using the New Zealand Threat Classification System. The threat ranking lists are often misconstrued as being ‘owned’ by the Department of Conservation. However, although the listing exercise for all New [...]

A helping hand for migrating fish Waiology May 23

By Paul Franklin and Sjaan Bowie Many of New Zealand’s iconic freshwater fish species, such as whitebait and eels, undertake migrations between the sea and freshwater as part of their life-cycle. Whitebait, for example, lay their eggs in freshwater or estuaries before the larvae move out to sea after hatching (Figure 1). After a number [...]

The value and values of water Waiology May 19

By Suzie Greenhalgh, Jim Sinner and Natasha Berkett The Land and Water Forum, the National Policy Statement for Freshwater Management and government proposals for further freshwater reforms all recognise the increasing competition between values for and uses of our freshwater resources in New Zealand. This competition has opened a new lexicon around what we mean [...]

LAWA’s new environmental monitoring website clears up water quality data Waiology Apr 08

By Maree Clark and Kati Doehring The launch of LAWA (Land, Air, Water Aotearoa) last month is a significant milestone for our country’s environmental reporting. A web-based platform, LAWA displays state and trend information for more than 1100 freshwater monitoring sites throughout New Zealand in one place, and in an easy to understand format. It’s [...]

World Water Day, 22 March Waiology Mar 21

By Daniel Collins Since 1993, March 22 has been World Water Day. Its purpose is to raise awareness of the importance of water to society and of the challenges people face in securing sufficient and safe water. Like many efforts run by the United Nations, it fosters collaboration between the economic and hydrologic haves and [...]

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