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How is water clarity measured and what is its significance?
Water quality levels are indicated by how well light transmits through water -
How do I compile accurate water quality models when there is incomplete or highly erratic data?
In order to compile accurate water quality models, you need data that draws on comprehensive information about water quality. -
Do glass eels return to waterways where they have familial roots?
Glass eels are juvenile forms of eel that begin life in the ocean trenches of the Pacific and migrate hundreds of kilometres to New Zealand. -
What is reasonable mixing?
Reasonable mixing is the amount of pollutant that can be discharged into a mixing zone. -
What is a mixing zone?
A mixing zone is a designated area of a stream or river into which wastewater is permitted to empty. -
UVI at Lauder
This information is provided as part of our UV Ozone service, which also includes ozone and UV maps for New Zealand, yesterday’s forecast and measured UV, UV Atlas software, and more. NIWA has also developed an instrument to measure UV levels and display the UV Index on an easy-to-read dial. This is intended for use at swimming pools, outdoor sports events, and so on. The measured UV Index can be affected by cloud cover at Lauder. -
Causes of altered water flow
How do land use activities potentially influence water flows? -
Causes of loss of riparian vegetation
What are the potential causes of riparian vegetation loss from land use activities? -
Causes of Infectious Substances
What are the potential sources of infectious substances from land use activities? -
Latent and sensible heat fluxes from lake water surfaces
The latent heat flux and evaporation from lakes are predicted to increase in a warming climate. This model script (written in Matlab) estimates latent and sensible heat fluxes from lake water surfaces. -
Riparian vegetation and mining
What are the potential impacts of mining activities on riparian vegetation around waterways?
