Owhiro Stream Enhancement Project
The Owhiro Stream is located in the Taieri Plains and runs through Mosgiel before draining into the Taieri River near Allanton. Prior to the arrival of Europeans, the Taieri Plains were home to a vast wetland and Kahikatea Forest. The rich soils on the plains meant the land was highly prized for agriculture and today the land is criss-crossed with an extensive drainage system, and intensive agriculture is the primary land use.
The Owhiro Stream has a long history and is important to local Iwi. As well as providing important mahinga kai species, the river was used as a passageway for canoes returning from Taieri Mouth to the Otakou Marae. The Owhiro Stream is also a large part of local legend involving a Taniwha who crawled from Mount Cook down the Taieri River and upon arriving at the East Taieri area, nestled into the landscape in the spot where Mosgiel Township now lies. The Owhiro Stream is said to be the tail of the Taniwha.
The stream has a history of poor water quality results both in the upper urban catchment and the lower rural catchment, impacted by stormwater and rural runoff. Previous restoration projects undertaken have aided in an improvement in water quality and it is expected that restoration projects such as this will aid in continuing the trend for improving water quality. This restoration project aims to fence and plant both sides of a 900 metre reach of the Owhiro Stream, and in the process of improving water quality, the project will also help to increase biodiversity and numerical abundance of native fish species found in the stream such as eels, red finned bullies, inanga, banded kokopu, and the endangered giant kokopu. These native species are typically found in low numbers and any habitat improvement is likely to increase population biomass. In addition to aquatic species, there have been a number of avian species noted in the area such as royal spoonbill, sparrow, blackbird, pied stilt, banded dotterel, paradise shelduck, mallard duck and pukeko in which restoration of the area will also assist in the protection of.
The Owhiro Stream Restoration Project will add to previous restoration projects and near complete one of the original aims of the community lead Taieri Trust project – to completely fence and enhance water quality in the Owhiro Stream. The project has multi-agency support and will offer an environmental educational opportunity for nearby landowners, local children and the wider community now and into the future. It is hoped that the completion of this project will encourage the remaining landowners to also fence their riparian areas. The project will help improve water quality and increase biodiversity through creating and protecting habitat for a wide range of exotic and native species.