for the 13th ZEMF meeting on 23 July 2014.
CAPE Estuaries Programme: Implementation of the Estuary Management Plan (EMP) for the Zandvlei Estuary,
Muizenberg, Cape Town.
Starting at 13h30 to
on 23 July 2014 at the Zandvlei Sports Club / Imperial Yacht Club.
ZEMF 13 Minutes ver B 20140723
SUMMARY OF FOLLOW-UP ACTIONS.
|| RESPONSIBLE PERSON
|| TARGET DATE
|Telephone list on Contingency Plan to be amended, and then whole document to be circulated to ZEMF Members.
||c/f May 2014
|Follow up on analysis of sediment cores taken near the mouth in order to inform options for disposal dredge spoil.
|Communication TWG around lowering of weir.
|Initiation of discussions around EIA on Mouth Management options
||c/f April 2014
Articles to be prepared to publicise Zandvlei What being a Sea Cadet at Zandvlei has
The stories that the patterns uncovered by CWAC tell.
What CAPE has helped the City to leverage through ZEMF.
|July 2014 & on.
Disputed list of minutes that are completed
||c/f April 2014
List of complaints – Marina Da Gama.Details , action planner
Costs to Cherry
Email, contact list for all staff and member on the committee
||SF, JG, NW
Follow up on composition & selection of protected area advisory committees.
1. Welcome, introductions and apologies
Apologies received from Cllr D’Alton, Arne Purves, Dalton Gibbs, Brendon Fortuin, David Walker.
The Chair welcomed all present and introduced Natalie Williams (NW), from Dalton Gibbs office, and Cherry Giljam who had a long-time involvement with Zandvlei and had
been invited to share her insights on sand movement as part of the discussion on mouth. NW would take minutes.
1a. Marina da Gama Association had requested to give a 15 Minute presentation.
This was not given as MdGA decided not to attend claiming that they had not been informed of the exact time of their presentation. (Note MDGA had been informed that the
window was between 13h30 and 15h30.)
2. Adoption of the Minutes of the 12th ZEMF Meeting
Confirmation of email Adoption of Minutes of ZEMF 12.
3. Matters arising from the 12th ZEMF Meeting
Dealt with under agenda items.
4. Pondweed Management
JG reported a total downtime for the harvester of 1month with servicing done within that time. Work commenced in Marina after the downtime to remove dead weed. 70% of
This year averaged 3 cuts per canal so well on track for the target of 7 per year. Only partial die off this winter but there is some early new growth which is worrying. Last
year cutting only starting in January. Looks like may have to harvest continually as little winter die-off. Storms have been short and sharp and higher temperatures than last
year. CG commented on amount of bird nesting activity.
The issue will be how to deal with strong growth early in season. The second harvester is an option and JG to communicate with Johan Herold who is very accommodating.
September is judgement time.
5. Communication and partnerships
As part of communicating about the Vlei and estuary the follow articles are scheduled to be written.
What being a Sea Cadet at Zandvlei has meant
The stories that the patterns uncovered by CWAC tell
What CAPE has helped the City to leverage through ZEMF
6. Mouth Management
MT reported that CH took the original DEA&DP mouth management authorisation and incorporated the proposal to manage the sand bar by progressive dredging and
trucking the sediment to Coastal Park. DEA&DP suggested returning sand to the marine environment. However, this is not practical operationally. In addition to the mostly
marine sand, there could also be organic matter from decomposition of aquatic vegetation making the sediment quality too poor to go out to sea. Various alternative options
were raised and will be investigated further.
CH noted that if there are a lot of anoxic sediments, when disturbed, these could cause an oxygen deficit with localised impact. The nature of the sediments to be
investigated. JG reported that sediment cores had been taken and that he would follow up and obtain the results.
TP required advice on best time of year for dredging. GP requested not in spring when breeding fish would be vulnerable. JG said winter flows might help with moving
sediment out of the mouth.
PdV had concerns about sandprawn recruitment and that we must expect certain amount of sacrificial loss. JG said data since 1st monitoring showed significant increases
from 2001 and noted that in mid-summer sandprawns recolonized v quickly. JG commented on apparent massive increase in density of prawn holes post the 2012 fish kill
and thinks they stress-breed so the same thing might occur with dredging. GL monitored sand prawns with Clifford Dorse some years ago and found recolonisation within 2
The Chair had invited Cherry Giljam, resident of Marina and with long-time close involvement in vlei management, to share her insights. Cherry gave valuable commentary
and showed pictures of previous sand movement and mouth dynamics.
7. Any Other Business
7.1 Progress on proclamation of the nature reserve and advertising for Advisory committee members.
Damian G asked if there are similar reserves that include residential Marinas and are they running ZEMF like structures?
SF follow up on composition of protected area advisory committees, qualification required for membership; and how PAAC members are chosen.
7.2 Safety and security around the estuary. JG no major issues. CG commented that it is nice to get to beach and find “brown guys” there. JG explained that security
guards doing ranger-type duties. They have a bakkie and so are able to get to the beach.
7.3 Coral worm status. Damian noted that they are proliferating. JG picking up coral worm in fresh water areas.
7.4 SF NW JG to check that distribution list is complete
8. Date and focus for next ZEMF meeting and Pondweed TWG in 2014.
To be confirmed but probably mid-November.