Docstoc

Conservation of urban wetlands a case study of - Conservation of

Document Sample
Conservation of urban wetlands a case study of - Conservation of Powered By Docstoc
					Co se at o o u ba      et a ds
Conservation of urban wetlands: a case
  study of wetlands rehabilitation in
          Gauteng Province


                        Thomani Manungufala



      Environmental Aff i
      E i         t l Affairs
      Water Affairs
      Agriculture, Forestry & Fisheries
             PRESENTATION OUTLINE
•   Introduction
•   Key challenges
-   Roads
-   Housing
-   Pollution
-   Waste
    W t
-   Wetland specialist assessments
-   F     i
    Farming
-   Mining
•   Conclusions
    C     l i
                            INTRODUCTION
                      W ATER M ANAGEM ENT AREAS
                                                                                                                 Z IM B A B W E
                                                                                                                               M O Z A M B IQ U E

                                                        BOTSW ANA                                                    2. L u vu vh u
                                                                                         1. L im p o p o             an d L etab a
P rovincial
B oundaries                                                                                             4. O lifan ts
W ater M anagem ent                                                         3. C ro co d ile
A rea B oundaries
           d i                                                                 (W est) an d
                                                                               M arico             P reto ria     5. In ko m ati

                                                                                    Jo h an n esb u rg
                                                      10. L o w er V aal
          N A M IB IA
                                                                                                8. U p p er
                                                                               9.       le
                                                                               9 M id d l          V aal             6.
                                                                                                                     6 U su tu to
                                                                                  V aal                               M h latu ze

                                                                                                       7. T h u kela
                                                                  B lo em fo n tein
                                     14. L o w er O ran g e      13. U p p er                                      D u rb an
                                                                     O ran g e                            11.
                                                                                                          11 M vo ti to U m zim ku lu


                  17.
                  O lifan ts/                                                  12. M zim vu b u to
                  D o o rn                                                       K eiskam m a
                                                       15. F ish to
                  19
                  19.                                      T sitsikam m a                    E ast L o n d o n
                  B erg              16. G o u ritz
         C ap e           18.                                              P o rt E lizab eth
         Town             B reed e
CHALLENGES
                             ROADS
• Effect on existing and potential rehabilitation activities
  - Indefinite suspension
  - Increased cost for re-planning
    Failure achieve
  - Fail re to achie e the intent for rehab
  - Severe degradation of the wetland
  Effect        tl d functioning and bi di
• Eff t on wetland f     ti i                   it
                                     d biodiversity
  -Edge effects on biodiversity
    Provisioning function
  -P i i i f          ti
  - Regulatory function
HOUSING
         POLLUTION AND WASTE

        g p
• Sewage spills – health of labourers –
  implementation delay – dimension of problems
  changes re planning
  changes- re-planning – costly
• Solid waste – dumping on wetlands – building
    bbl    d        l    t
  rubble and general waste
 WETLAND SPECIALIST ASSESSMENTS
• Buffer zones
  * rationale/species specific/ function specific
  - 30m for wetlands occurring inside the urban edge
  - 50m for wetlands occurring outside the urban edge
   - Grass owl 570m buffer around each confirmed point.
• Whistle blowers become wetland
  specialists
  CONSEQUENCES UNSCRUPULUS
 WETLAND SPECIALIST ASSESSMENTS
• On wetland rehab activities
• On biodiversity within wetlands
• -Vulnerable- Endangered- Extinction
              FARMING AND MINING
•   Cultivation
•   Livestock farming
•   Surface mining
•   Open cast
    Effects on rehab activities and biodiversity
              CONCLUSIONS
                               y
• Decision makers are not very conversant with
  wetlands assessment tools – e.g WET TOOLS
• Urban wetlands are under siege from
  developers and wetland specialists
• Hillslope seeps highly in danger like the rhinos
• Working for wetlands programme is always
  available to provide specialist advisory service.

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:12
posted:3/7/2011
language:English
pages:22