State of the Bay Report 2010-Final - Anchor Environmental

LIST OF TABLES
Anchor Environmental
Table 3.1. Ranking categories and classification thereof as applied to Saldanha Bay and
Langebaan Lagoon for the purposes of this report. .................................................... 40
Table 4.1. Summary of major development in Saldanha Bay ...................................................... 45
Table 4.2. Total human population and population growth rates for the towns of Saldanha and
Langebaan from 1996 to 2004 (Saldanha Bay Municipality, 2005). ............................ 47
Table 4.3. Projected total human population and population growth rates for the towns of
Saldanha and Langebaan (Saldanha Bay Municipality, 2005). .................................... 47
Table 4.4. Mean trace metal concentrations in ballast water (mg/l) and ballast tank sediments
from ships deballasting in Saldanha Bay (Source: Carter 1996) and SA Water Quality
Guideline limits (DWAF 1995a). ................................................................................. 62
Table 4.5. General standards as specified under the Water Act 54 (1956) and revised general
limits specified under the National Water Act 36 of 1998. ......................................... 70
Table 4.6. Monthly rainfall data (mm) for Saldanha Bay over the period 1895-1999 (source Visser
et al. 2007). ............................................................................................................... 78
Table 4.7. Typical concentrations of water quality constituents in storm water runoff (residential
and Industrial) (from CSIR 2002) and South Africa Water Quality Guidelines for the
Natural Environment (*) and Recreational Use (**). Values that exceed guideline
limits are indicated in red. ......................................................................................... 79
Table 4.8. Characterisation of effluent from Sea Harvest and Southern Seas Fishing factories in
2001 and 1996/7, respectively (Data from Entech 1996 In CSIR 2002). ...................... 80
Table 4.9. Details of marine aquaculture rights issued in Saldanha Bay (source: DAFF pers. comm.
2011) ........................................................................................................................ 83
Table 5.1. Maximum acceptable count of faecal coliforms (per 100 ml sample) for mariculture
and recreational use .................................................................................................. 93
Table 5.2. Percentage of samples in which the concentration of E. coli was above the 80 th
percentile limit specified in South African Water Quality Guidelines for recreational
use (100 organisms/ml) for 10 sites in Small Bay, 4 sites in Big Bay and 4 sites in
Langebaan Lagoon. Blue shading indicates compliance with regulations, while pink
shading indicates non-compliance. Dashes (-) with no shading indicate that no samples
were collected in that year. (Source: Saldanha Bay Water Quality Forum Trust). ...... 95
Table 5.3. Percentage of samples in which the concentration of E. coli was above the 95 th
percentile limit specified in South African Water Quality Guidelines for recreational
use (2 000 organisms/ml) for 10 sites in Small Bay, 4 sites in Big Bay and 4 sites in
Langebaan Lagoon. Blue shading indicates compliance with regulations, while pink
shading indicates non-compliance. Dashes (-) with no shading indicate that no samples
were collected in that year. (Source: Saldanha Bay Water Quality Forum Trust). ...... 96
Table 5.4. Percentage of samples in which the concentration of Faecal coliforms were above the
80 th percentile limit specified in South African Water Quality Guidelines for
recreational use (100 organisms/ml) for 10 sites in Small Bay, 4 sites in Big Bay and 4
sites in Langebaan Lagoon. Blue shading indicates compliance with regulations, while
pink shading indicates non-compliance. Dashes (-) with no shading indicate that no
State of the Bay 2010: Saldanha Bay and Langebaan Lagoon 18