Summer dissolved oxygen conditions in six streams in the Waihou catchment, 2009
Report: TR 2014/11
Author: Paul Franklin, National Institute of Water and Atmospheric Research Ltd
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.