Zandvlei Trust

Zandvlei 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 open.


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.

1. Background Information   updated

2. Social   updated  07/05/2016.

3. Information Management   updated  18/05/2016.

4. History    updated   27/05/2016.

5. List of people participating  updated 12/03/2016.

6.  Abiotic

Rainfall  updated 04/05/2016.

Salinity   updated 23/05/2016.     Note  Zandvlei Estuary mouth opening and closing dates are under Salinity. 

7.  Biotic


Amphibians   updated 

Birds   updated  07/05/2016.

Bird photo gallery   updated 

Fish  updated

Insects   updated   26/05/2016.

Mammals   updated  07/05/2016.

Reptiles  updated


Terrestrial plants   updated 

Plant list & photo gallery   updated

Invasive terrestrial plant clearing   updated 16/05/2016.

Water plants  updated 

Invasive water plants  updated


Download - River Health, Community Water Monitoring Toolkit.

The Mini SASS toolkit by GroundTruth.


Front & Back pages
2. Inside pages
3. Groups Info
4. Dichotomous key


Send your contributions, comments or queries to Gavin Lawson.

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