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Archive: Waiology June 2014

Citizen science: How deep is the snow at your place?

Waiology Jun 06, 2012

By Daniel Collins and Ross Woods Measurements of snowfall at low elevations around New Zealand are few and far between, and yet the data would be really helpful in understanding how snowfall occurs and quantifying snow-related risks. After all, the large majority of New Zealand’s population and infrastructure reside closer to the coast than the mountains. And so we’d like … Read More

How much water does it take to produce one litre of milk?

Waiology May 24, 2012

The single biggest consumer of water in New Zealand is the dairy industry. As of 2010, farmers are permitted to take about 4707 million m3 of water per year from New Zealand’s rivers and aquifers to irrigate pasture, most of which is for dairying. This is 44% of all consumptive uses (excluding the Manapouri hydropower scheme), and 68% of … Read More

Canterbury water use, 2010/11

Waiology Apr 10, 2012

Guest post by James Tricker, Principle Extension Services Officer, Environment Canterbury There are increasing expectations, both within the Canterbury community and also within a national context, that the relation between water allocation and water use is more strongly understood. The Environment Canterbury Water Use Report presents the information gathered on consented water use in Canterbury between 1 July 2010 and … Read More

Canterbury Lysimeter Network: Measuring the hydrologic inputs to aquifers

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 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

Rainfall recharge to groundwater

Waiology Jan 17, 2012

Guest post by Paul White, Senior Groundwater Scientist at GNS Science. Groundwaters are very important water resources in many New Zealand regions — important because they are used for water supplies (urban and rural) and because they supply flow to many springs, streams, rivers and wetlands. The two major inflows to groundwater are from rainfall and from surface … Read More

Edmond Halley, an underappreciated hydrologist

Waiology Jan 09, 2012

By Daniel Collins I remember in 1986 going to the Beverly-Begg Observatory, in Dunedin, to see Halley’s Comet. At the time, I was a young kid fascinated with astronomy. I had discovered a book on the topic the previous year while on holiday in Central Otago, and soon joined an astronomy club. Through the club, I built a basic … Read More