Another Scruffy Marina, This Time at Dargaville

Here we have another very muddy marina in which the boats wallow about in the mud from about half-tide down. Not surprising since this marina is in the Northern Wairoa River which drains a huge area of pastoral Northland, collecting sediment and discharging into the northern half of the Kaipara Harbour and passing Dargaville on the way.

The small marina at Dargaville cradles the boats in a wallow of mud from mid-tide downwards.  Who needs (or can afford) maintenance dredging?  The current situation obviously works!

The small marina at Dargaville cradles the boats in a wallow of mud from mid-tide downwards. Who needs (or can afford) maintenance dredging? The current situation obviously works!

A glance at the Google Earth image below shows very muddy water in the Northern Wairoa River. This amount of sediment chronically entering the harbour must have had a huge impact over the years on the ecology of the northern Kaipara. In fact there is no seagrass in the northern Kaipara where it used to be, because it has either been smothered by silt or the water is no longer clear enough for sufficient light to reach the seabed to support seagrass, even over intertidal areas.

Google Earth image showing very muddy water in the Northern Wairoa River passing through Dargaville and discharging brown sediment into the otherwise relatively clean-looking Kaipara Harbour.  The ecological damage to the Kaipara from this chronic discharge must be huge.

Google Earth image showing very muddy water in the Northern Wairoa River passing through Dargaville and discharging brown sediment into the otherwise relatively clean-looking Kaipara Harbour. The ecological damage to the Kaipara from this chronic discharge must be huge.

Perhaps there will be no need to carry out maintenance dredging at Sandspit after all? The extreme silty situation works OK at Thames and Dargaville. So perhaps Sandspit marina berth-holders will just get used to it. More pix follow:

Dargaville 3

Dargaville 4

Dargaville 5

Dargaville 6

Dargaville 7

Dargaville 8

Dargaville 9

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