Inventory and Monitoring Programme (ZIMP)
photograph by Barry Parker.
Barry Parker photographed this
interesting phenomomen from above Kalk Bay on 07/04/2016.
This is the result of an anticlock circulation, corresponding to spring tide which brings warm water,
with calcites from Swartklip area around to Simons Town.
The brownish water at the surf zone is from Zandvlei as the estuary mouth was
image from the City of Cape Town website.
Cape Town dam levels published on
04 May 2016.
Location of Zandvlei
- Zandvlei is situated between 34 degrees
05' 00' S - 34 degrees 06' 30" S and
18 degrees 27' 30" E - 18 degrees 29' 00"E.
- It is 25 kms south of Cape Town, on the South
Peninsula. The mouth of Zandvlei opens into False Bay, at Muizenberg.
- The catchment of Zandvlei extends furthest
north to the source of the Diep River above the Kirstenbosch Botanical Gardens about 15kms away and then enters Zandvlei as the Sand River in the north east. Streams from the Penninsula Mountains feed the Keysers and the
Westlake Rivers which flow into Zandvlei from the north west. The main waterbody is about 96 hectares. The average total annual rainfall is between 450 - 700mm.
- Zandvlei is rated in the top 25% in importance
of all the estuaries along the South Africa coastline.
It is 43 out of the total of 256.
- At mid summer the sun angle is 79 degrees above the north
horizon and mid winter it is 33 degrees.
- Day time air temperatures can range from 40 to
5 C degrees in mid summer to mid winter. Mean seasonal average day temparature
is 22 C degrees. Air temparature and wind strength does vary and is
influenced by local geographical conditions. Humidity levels are low, due mainly to the prevailling
cool winds from the sea, in the south east, south west and from the north west directions.
River Health, Community Water Monitoring Toolkit.
Send your contributions, comments or queries to Gavin