Project Twin Streams - 12 Years of Community Riparian Planting and Stream Health Reporting

This paper summarizes water and sediment quality data from PTS streams collated during four “snapshot surveys” conducted over a 12 year period and provides a summary of any trends and compliance of this data with environmental guidelines for aquatic ecosystem health and contact recreation. The reporting has been framed according to stream type using the river environment classification (REC) and land cover database (LCDB) version 4 to ensure that nonhuman induced effects on water quality (e.g. climate, source of flow, geology, land cover etc.) are factored out, thereby comparing like with like stream types.

Unlike previous reporting, this paper includes comparisons of the PTS sites with other sites from Auckland Council’s State of the Environment (SOE) monitoring program. In making these comparisons it provides context as to how PTS catchments compare to other parts of the Auckland Region.