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Summer dissolved oxygen conditions in six streams in the Waihou catchment, 2009

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Report: TR 2014/11

Author: Paul Franklin, National Institute of Water and Atmospheric Research Ltd

About this report

In small streams that are heavily abstracted, reduced flows can result in slower velocities in the lower reaches and amplify the nocturnal sag in dissolved oxygen (DO) levels associated with the dense macrophytes commonly present. Currently, little is known about the extent of these water quality impacts on fish or whether fish migration and/or habitat in small streams is compromised.

Read or download the survey report

Summer dissolved oxygen conditions in six streams in the Waihou catchment, 2009 (1mb)

Contents

  Executive summary
1 Introduction
2 Monitoring sites
2.1 Site descriptions
2.2 Methodology
2.3 Data analysis
3 Results
3.1 Flows
3.2 Dissolved oxygen
4 Discussion
5 Conclusion
6 References