Trends in nuisance periphyton at New Zealand National River Water Quality Network sites 1990-2006 / John M. Quinn, Ernst Raaphorst.
By: Quinn, J.M.
Contributor(s): Raaphorst, E | National Institute of Water and Atmospheric Research (N.Z.)
| New Zealand. Ministry for the Environment.
Material type: 
BookSeries: NIWA client report; HAM2008-194; NIWA project: MFE09202.Publisher: Wellington: Ministry for the Environment, 2009Description: 22 p.Report number: CCMAU4 0912Subject(s): PERIPHYTON | FRESH WATER | RIVERS | NEW ZEALAND | TRENDS | NRWQN | WATER QUALITY | AQUATIC ECOSYSTEMS | AQUATIC ORGANISMS | WATER POLLUTION | ENVIRONMENTAL MONITORINGHoldings: ELECTRONIC Online resources: Click here to access online | Click here to access online Summary: Periphyton cover has been assessed at 73 of the 77 National River Water Quality Network (NRWQN) sites during monthly site visits since autumn 1989. Periphyton is evaluated visually as percentage cover of a standard wadeable area by mats or filamentous algae. The NRWQN sites include those classed as baseline (minimally impacted by human activities in their catchments) and impact, often with paired baseline and impact sites along single rivers. The report addresses three questions in relation to the NRWQN sites for the period 1990-2006: (i) Does periphyton exceed Ministry for the Environment (MfE) guidelines for nuisance effects on aesthetic and recreational values? (ii) Do human pressures influence the periphyton levels in and along the NRWQN rivers? (iii) Is the situation getting better or worse?
| Item type | Current library | Call number | Copy number | Status | Date due | Barcode | |
|---|---|---|---|---|---|---|---|
BOOK
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WELLINGTON ONLINE | ELECTRONIC | 1 | Available | 144336-4001 |
"June 2009."
Includes bibliographical references.
Periphyton cover has been assessed at 73 of the 77 National River Water Quality Network (NRWQN) sites during monthly site visits since autumn 1989. Periphyton is evaluated visually as percentage cover of a standard wadeable area by mats or filamentous algae. The NRWQN sites include those classed as baseline (minimally impacted by human activities in their catchments) and impact, often with paired baseline and impact sites along single rivers. The report addresses three questions in relation to the NRWQN sites for the period 1990-2006: (i) Does periphyton exceed Ministry for the Environment (MfE) guidelines for nuisance effects on aesthetic and recreational values? (ii) Do human pressures influence the periphyton levels in and along the NRWQN rivers? (iii) Is the situation getting better or worse?
Also available on the internet.
ELECTRONIC
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