Pikowai local urges action on dunes
Man says council needs to remedy erosion of sand
Pikowai resident Rodger Allan is worried there will soon be no sand dunes left in front of his home if the Bay of Plenty Regional Council does not take action, as it has in the past.
The Mimiha and Herepuru streams that normally flow out of the valley along the Pikowai straight and empty into the ocean have recently been redirected along the beach by a naturally formed sandbank just offshore.
Allan, who is 80 years old and has operated as an orchard developer around the Bay of Plenty for more than 50 years, said the water was washing away the dunes between the beach and the railway line.
It was something that happened from time-to-time but was easily corrected.
He said the last time this happened, around two years ago, the river had eaten away 10 metres of dune area in just four days. When he told the regional council, staff came out with a digger and dug a trench through the sandbank to redirect the river water away from the sand dunes.
He said that this time the erosion was worse than before.
“[The stream entrance] blocks up when you get a storm and it needs opening up, otherwise it starts heading along the beach,” Allan said.
“We’ve done it ourselves once or twice since the regional council did it two years back. If you get it quick enough, you can just do it with a shovel. Once the water starts running through, it just gouges out its own channel and goes back to its natural place. This time it’s got away on us and now [the sandbank] is too big. It would take an army half a day, but with a digger it’s 10 minutes work.”
But this time the regional council has refused to take any action, saying it is just nature taking its course.
Regional council land management officer Rusty Knutson said dunes were dynamic and changed all the time.
“The new stream direction is a naturally occurring event. While the stream often goes directly out to sea, this course is sometimes blocked — usually by sand after strong winds or storm events — forcing it to go in a different direction, as it has many times in the past. In this case, the new pathway is parallel to the beach, but it’s unlikely that this course will be permanent.
“When erosion does occur, lost sand typically accumulates in a sand bank offshore. It then makes its way back onshore when the wave and wind conditions are more favourable to dune formation.”
Allan said that in the past farmers had brought their tractors down and opened the sand bank that was blocking the stream from heading out to sea.
“You go to jail if you do that nowadays. You need a resource consent and permission from the iwi, and this and that and the other thing. [The regional council] spends all this money to restore the sandhills, sprays them for weeds and plants p¯ıngao, and yet they let them get washed away.”
He said he and his neighbours looked after the dotterels on the beach in front of his home, fencing off areas where they were nesting.
“There were about seven nests on this beach last year. Now the river’s right on top of where they normally nest.”
He said he had voiced concern to the council that the railway tracks could be in danger, but Knutson said there were no indications to suggest they were in danger, currently, or that dotterels would be adversely affected.
“While the dotterels will be nesting soon, they will adapt to the current direction and placement of the stream to find a suitable place to nest,” Knutson said.
“Dotterels are more likely to be affected by the presence of people, vehicles and dogs on the beach.”