Deep within the Hunua Ecological District flows a stream. This is the Hauarahi Stream. The Hauarahi Stream holds high ecological value. This is due to the presence of at-risk freshwater fish species.
The Western Firth Catchment Group recognized the Hauarahi Stream’s importance. They approached Access to Experts for help. They needed an assessment of the stream’s health. They also wanted recommendations for restoration. The Hauarahi Stream connects freshwater and seawater. This connection is vital for native fish. They need both environments to complete their life cycle.
Emily Fensham from Beca worked alongside Ric Balfour. Ric is the Waikato Catchments Coordinator for Landcare Trust. Together, they assessed the Hauarahi Stream. Emily gathered information from various sources. She reviewed visual changes and past reports. She worked with the local catchment group to understand the stream’s history. Emily also worked with local farmers and the community. Their local knowledge proved invaluable.
The assessment revealed several challenges for the Hauarahi Stream. Erosion hotspots and sediment loading were significant issues. Stock access to the stream caused damage. Riparian vegetation was poor or absent. This further contributed to erosion. Fish passage barriers hindered their movement. Degradation of inanga spawning habitat threatened their reproduction. Flooding also posed a risk to the Hauarahi Stream’s health. A lack of funding was a major barrier to improvement.
Emily recommended a suite of restoration activities. She prioritized each activity to help the catchment group plan. The report provided a basis for future stream management plans. It also supported funding applications. The work highlighted challenges for small catchments. Finding historical data was difficult. Limited resources hindered significant changes. The project also demonstrated the value of local knowledge. Strong local commitment can drive improvements.
The Western Firth Catchment Group continues its work. They proactively manage streams within the catchment. They partnered with Living Water. Living Water is a DOC or Fonterra partnership. The partnership identified the catchment area needing stream mitigation. This was to protect the wading birds. The group has done significant stream planting and monitoring. They also partnered with Ecoquest from Kaiaua. Ecoquest has been sampling three streams. They are seeing long-term trends of the effects of stock exclusion and planting. Silt traps reduce silt entering the main streams.
This year, the trust plans to focus on the Hauarahi Stream in Kaiaua. They have already done a lot of planting and stream clearance in the lower reaches. The next stage is about to begin in the Kaiaua domain. This involves digger work, fencing and planting. The Hauraki District Council, Waikato Regional Council and iwi are also working on this project. Funding comes mainly from the Aotearoa Gaming Trust and Hauraki District Council.
So, as you stand here beside the Hauarahi Stream, consider its journey. Think about the challenges it faces and the efforts to restore it. This small stream is a vital part of the ecosystem. The Hauarahi Stream’s story is a reminder of the importance of community involvement. It highlights the need to protect our waterways. The Hauarahi Stream flows towards a healthier future.