The Auckland Domain lies mostly within the Pukekawa Volcano crater. Originally, the crater floor was a lake, which later turned into a swamp and slowly filled up with alluvium and sediment, before being drained by Europeans for use as playing fields and parkland. These origins are still somewhat visible in that the Duck Ponds are freshwater-fed from the drainage of the crater.
What you see in the photo are success story of keeping the ponds pure. They have increased the size of the pond from when I first saw them over twenty years ago. The fountains aerate the water, and people are told not to throw food in the water to feed the ducks.
This was not the case ten years ago. I have written a couple of post one this.
http://ann-mythoughtsandphotos.blogspot.com/2009/04/western-springs-do-not-feed-ducks.html
I remember another little pond at the Domain next to the Auckland hospital. I used to go and spend my lunch time feeding the ducks. In May when the official duck shooting is opening, you will see a zillion ducks seeking shelter in the tiny pond. You hardy see the water at all. Years later when I came back from Singapore, I found botulism had killed the ducks, and the pond was a smelly mess. The water engineer said this can be saved. In deed, some smart water engineer had widen the pond, put in a few fountains that pumped air into the water, and the pond is now a beautiful family and tourist attraction place again.text-align:center;cursor:pointer; cursor:hand;width: 400px; height: 300px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxtb-ZeHCej6i8T8_jw5OK1rMcQAcxnxMm30xTYXArOuwh5AmJLgB5nyNrfVhjgEimXtS7YKJaOOpGW8mJRZj4ALwry5Z21Qv6escoBvQ6XXHYyfn4clklq4QbS3geCaAr2sAxGeJIdBmA/s400/fountain+2.jpg" border="0" alt=""id="BLOGGER_PHOTO_ID_5489070642077993762" />
http://waterywednesday.blogspot.com/
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