Download
1 / 44
440 likes | 556 Views
Figure 1. Current meters Tide gauges. Figure 2. Current speeds incoming tide spring tide July 06. 20 cm/s. 85 cm/s. 60 cm/s. Figure 3. Current speeds outgoing tide spring tide July 06. 15 cm/s. 60 cm/s. 40 cm/s. Figure 4. Current speeds neap tides July 06. 8 cm/s. 35 cm/s.
E N D
Figure 1 Current meters Tide gauges
Figure 2 Current speeds incoming tidespring tide July 06 20 cm/s 85 cm/s 60 cm/s
Figure 3 Current speeds outgoing tidespring tideJuly 06 15 cm/s 60 cm/s 40 cm/s
Figure 4 Current speeds neap tidesJuly 06 8 cm/s 35 cm/s 25 cm/s
Figure 5 Peak current speeds during river flood 3 Aug 06 Always outgoing 75 cm/s 105 cm/s
Figure 6 Average current speeds during river flood 3 Aug 06 Always outgoing 50 cm/s 75 cm/s
Figure 7 1942
Figure 8 1961
Figure 9 1975
Figure 10 1978
Figure 11 1985
Figure 12 1987
Figure 13 22 July 1994
Figure 14 10 December 1996after Nov 1996 floods
Figure 15 10 October 1997
Figure 16 Jan 1999
Figure 17 5 September 2000
Figure 18 28 March 2001
Figure 19 10 October 2002
Figure 20 2003
Figure 21 27 June 2003
Figure 22 6 March 2006
Figure 23 26 July 2006
Figure 24 6 October 2006
Figure 25 Flood tideSki Canal closed Sea Glades closed estuary flow marina through flow marina local flow This was the situation from ~ 1985 to mid-2002 before Sea Glades Bridge was constructed
Figure 26 Flood tideSki Canal open Sea Glades closed estuary flow marina through flow marina local flow This was the situation from mid-2002 (when Ski Canal opened due to a large southward migration of the estuary inlet) till 27 October 2003 when Sea Glades Bridge was opened
Figure 27 Flood tideSki canal open Sea glades open estuary flow marina through flow marina local flow This was the situation from 27 October 2003 (when Sea Glades Bridge was opened) to the present
Figure 28 Flood tideSki Canal closed Sea Glades open estuary flow marina through flow marina local flow This would be the situation if Ski Canal closes again
Figure 29 Sand banks in the marina as at 10 June 2006 Upstream of Sea Glades Bridge
Figure 30 10 June 2006 Downstream of Sea Glades Bridge
Figure 31 10 June 2006 Upstream of Shore Rd Bridge
Figure 32 10 June 2006 Around Bird Island
Figure 33 10 June 2006 Ski Canal and downstream ofBird Island
Figure 34 10 June 2006 Cove Canal
Figure 35 10 June 2006 Cove Canal
Figure 36 10 June 2006 Cove Canal
Figure 37 Effect of tsunami at Port Elizabeth harbour
Figure 38 Bird Island 27 June 2003before Tsunami
Figure 39 Bird Island 6 March 2006after Tsunami
Figure 40 Sea Glades Bridge 27 June 2003before Tsunami; Sea Glades Bridgewas opened 27 October 2003
Figure 41 Sea Glades Bridge6 March 2006after Tsunami; Sea Glades Bridgewas opened 27 October 2003
Figure 42 Tsunami on Sri Lanka coast strong backwash carries sediment seaward
Figure 43 Tsunami on Sri Lanka coast strong backwash carries sediment seaward
Figure 44 Erf 1362 Erf 1363 Erf 1468 Maintenance dredging of canal to reduce current speed Trim corner even more to reduce turbulence. Erf 1467 Trim corner to reduce turbulenceErf 1470 Erf 2845 Widen canal: trim Erf 1473 Maintenance dredging of canal to reduce current speed Maintenance dredging of canal to reduce current speed Armour banks where water currents are causing erosion Erf 1474 6 March 2006
