Debris dam construction on Taharoa Trust

The Taharoa team have decided to make the most of the low water levels in the Mangatupae stream by constructing a series of debris dams.  The Mangatupae catchment is actively eroding and the stream bed has dropped by 3 metres over the past 30 years.  The goal of the debris dam is to help stabilise and rebuild the stream bed by trapping the silt.  This structure will be just one of the many tools used to reduce erosion.  Last year, 2 bush blocks were fenced off and retired (5 ha).  This coming winter we will attempt to fence off another 5 ha bush block with a fence line bladed to retire the stream.

Further up in the headwaters, a new soil conservation trial is underway with native trees protected by a new guard.  Our hope is that all these tools will contribute towards finding a positive outcome for our freshwater quality and our biodiversity.  Erosion control will be a long term battle so we will keep you posted on any further developments.

IMG_3046

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

w

Connecting to %s