Sunday 23 October 2016

The New Zealand Spring arrives and with it some good news


Welcome to the Midnight Collective Broadsheet 124
Actively supporting NZ’s endangered wetland birds
Paradise duck (putangitangi) chicks at Raumati Beach
The remaking of our dunelake area is now nearing completion and though we have been highlighting serious problems, there are a couple of wildlife good news stories at last. 

The local District Council has been undertaking flood control work above the bridge construction site. In doing this they have monitored then removed at risk marine life. The results are encouraging in that eel, whitebait (the punua (young) of five species of native fish), and the endangered kokopu have been discovered up in the town precinct. So despite two years of pretty constant site pollution, these marine animals appear to be still able to make their way through to this area.

One of our biggest worries however continues to be the loss of our local water birds. This is particularly concerning over the duck population which has virtually disappeared. By mid-spring we would normally have had around 6-8 broods come out on the creek and the dunelake. So far we have spotted only one. And they didn’t hang around for long.

However a black swan with cygnets was seen in mid-September (though not by us), making their way upstream. These females are pretty canny regarding the safety of their young and a swan pair with cygnets subsequently appeared in a small wetland pond on the other side of the airport. This may be the same family, because a drain links the Wharemauku to this area.
Paradise duck family under bridge -nervous father at top of bank
Indomitable mother and her five chicks (two days old)
Just as surprising has been sudden emergence of a paradise duck pair with five chicks, right under the bridge itself. The male had been seen on his own for a while which can indicate a nearby nest, and this may be the same family that raised a brood last year, because they tend to come back to the same area to breed. Last year they hung around for about three weeks before leaving for safer climes. 
The next day she had moved them to the other bank
These birds are very good parents though the Dad was very nervous about hanging around in such an exposed area. Three days later the mother had moved them all over into the new cleared area.
On the march. She's taking them out into the open spaces away from the bridge.
There is a problem here with safety because the  area has now been permanently drained. 
Drain to Wharemauku - East
Drain to Wharemauku -West

Surface water continues to collect but this is very shallow and the safety of these birds is dependent on their ability to get out into the middle of a lake when threatened. They are currently much more vulnerable to kahu, predatory pukeko, spurwinged plover and then domestic animals than  previously, when there was deep water and plenty of vegetative cover. This may sort itself out over time however.

To our even greater surprise we discovered what appears to be a second brood at the other end of this reconstituted area.  Here there we found six chicks with a rather bemused father. Though we’ll have to wait to confirm this.    
New brood at southern end of escaprment
Putangitangi chicks making themselves at home
The pukeko’s are back but we haven’t yet seen any youngsters which is surprising; though its still early days in the season.
Lone Pied Stilt 
The other regular is the Pied Stilt. There are three returnese feeding. Two are obviously a pair while the third may be an adolescent reluctant to leave home, or once again, a bird whose mate is sitting on a nest. These birds share nesting duties, but the tell tale sign is when they mount an aerial attack on intruders and they can do this from half a mile away. They seemed quite unperturbed by our presence which indicates there probably isn’t a nest close by.

It is still early days in the re-settling of this area. There are big losses but also plusses and we’ll just have to wait and see how they  pan out. Nature is already taking back control  with cleared and planted areas rapidly weeding back up; but the big test will be as this duneland dries out in summer. Lupin and blackberry are having a field day, though it wont be clear just how much of a wetland we have left until we’ve seen a full year’s cycle.
Incandescent tui in the kowhai
And here finally is another good news story. They are very difficult to photograph but this year has seen a significant rise in the local tui population. They relish the yellow kowhai which seems to not only give them sustenance but also something like a sugar high (those with children will know what we mean. 
And another
We have five trees in our garden and another three close by and counted  eight birds this year. They larrikin around and really go for the sparrows (they’re meat eaters too... uh oh!). They’ve now developed a taste for Japanese cherry and camellia flowers, so there should be a further population increase come the new year.
The Tony Soprano of our native bird world 
Track we were  listening to while posting this…well we’ll have to go for Dylan with his Nobel Prize given the fact that he doesn’t seem fussed one way or the other which rather shows up the other laureates as a tribe of fast Harry’s (and Harriets) …

So here’s something from  Another Side… I shall be free No 10  all done extempore if my memory serves me well

You’re probably wondering about now
What this song is all about
What’s probably got you baffled more
Is what this thing here is for
(Jangles a chord sequence)
That’s nothing (giggles)
Just something I picked up over in England

Sunday 9 October 2016

M2PP Expressway -The Big Flood –Is Kapiti flood management now at risk? Part 2 What Happened next?


Welcome to the Midnight Collective Broadsheet 122

Actively supporting NZ’s endangered wetland birds
Flooding on the Western side of the expressway
The Wharemauku can rise in a flood very quickly, but it also falls quickly. So this flood was unusual in that it stayed at bank topping level from Friday night through Sunday. Yet unlike last year’s major flood,  the creek never breached its banks to flood our local housing. There was flooding down at the beach, but the Wharemauku stabilised at around two thirds of a metre (two feet) below the level where residential houses are at risk. These photo’s tell the story.
Wharemauku downstream at the height of flood
Pollution monitor on western side of expressway. Water level 2 feet+ below last year's flood  
During the big flood the photographer would have been standing waist deep in water taking these shots and the flood had risen well above the monitor.
Usual flood plain of Wharemauku East of Expressway - unaffected at height of flood 
Upstream on the eastern side of the expressway the creek was contained within its stop banks. This drain (pictured) is the point at which the creek usually begins to overflow into the paddocks beyond, helping to relieve flooding downstream. As you can see it is still well below the levels where that backfilling occurs. 

So this flood would not normally have resulted in a major inundation of this area yet it did. Why? 
Flooding on Eastern side - expressway to right
The cause can be traced to the new drain set below the expressway bridge that now drains our dune lake into the Wharemauku. 
New drain inundating dunelake on Western side of expressway 
The flood pushed aside the steel sheet blocking the drain. The NZTA removed this sheet on the Sunday morning in an effort to drain the area but the flood didn’t begin to recede until later Sunday night. This backfilling filled both sides of the expressway and very quickly. An area that had been pumped dry on the Friday night was completely inundated on Saturday morning while the drain previously used to pump polluted water into Drain 7 was also overwhelmed.
Drain at back of dunelake showing new work to clean it up 
Same area a day later -western side -expressway in distance 
The implications of this are important because the NZTA have moved the Wharemauku’s flood plain, over to the other side of the creek, much closer to housing while back filling feeder drains coming through the town centre. This area will now flood at much lower levels than previously and there is no indication from official sources –the District and Regional Councils, let alone the NZTA itself, that they are aware of these developments, or how concerning they are.
New plantings inundated on the western side of the expressway, 
As you can see from these photographs this is a very serious flood of this area. It has never happened before in the five years we have been monitoring this dunelake and it appears to have taken all the relevant authorities by surprise.  Do they even know, because there has been no publicity about it. At the time we were monitoring this, through the Saturday and Sunday, the only staff we encountered were the lone worker with the shovel, and the digger driver who removed the steel sheet.  

It is still not clear exactly why this area flooded both sides of the expressway so quickly, and this is a worry bearing in mind that this flood would not normally have  caused problematic flooding. The NZTA however, must have been aware that this backfilling would occur but we have no confidence that they knew the extent to which it would take over the area, nor the wider implications.

In the longer term the NZTA have  managed to turn a unique urban dunelake into a flood plain that has already destroyed much of their recent plantings. It will gradually change the character of this area as it picks up silt from regular flooding. What will be the longer term implications of this? Will it work to undermine the earthworks of the expressway, which are primarily comprised of sand?
After the flood - the drained dunelake now devoid of  wildlife. 
As a final note it is worth recording once again, that the NZTA stated to the Board of Inquiry that they would take only .18 hectare of this wetland and leave the rest untouched. It has now drained the area completely and emptied its rich bounty of wild life. 

Track we were listening to while posting this the Rolling Stones Start Me Up. OK well, they may be way past there glory days, and Jagger lost all  cred. when he buttered up to Thatcher; but Keith Richard well, he remains the heart and soul of it all.  
You can start me up
You can start me up I'll never stop
I've been running hot