Gabriola Island Shoreline Mapping

Extracted text (beginning)

01,0002,000500
Met er s
/
DATE:  October 25, 2011
Refer to Islands Trust Report “Gulf Islands Shoreline Mapping - Project Methodology” July, 2011 for detailed map information. 
1 Km
boulder / cobble
marsh/fine sediment
low rock/boulder
Watershed Boundaries
Drainage Conveyance Zones      
(wetlands, creeks & moist soil areas)
sea cliff
pebble / sand
Islands Trust
Preserving island communities, culture and environment
MAPPING PRODUCTS PRODUCED BY:    Murdoch de Greeff Inc. (Project Lead) | Coastal and Ocean Resources Inc. | Archipelago Marine Research Ltd. | Land & Water Inc.             IN PARTNERSHIP WITH:    UBC School of Architecture and Landscape Architecture  and the  Islands Trust.
PROJECT FUNDING GENEROUSLY PROVIDED BY:  
Rock (Hard) ShorelinesSediment (Soft) Shorelines
PEBBLE/SANDBOULDER/COBBLEBLUFFLOW ROCK/BOULDERSEA CLIFF
• rocky shore with 
low slopes
• 59% of shoreline   
(39 Km)
• stable or accreting 
pebble-sand (or shell) 
beaches (may be 
eroding where sediment 
supply is interrupted).
• 9% of shoreline             
(6 Km)
• rocky shore with 
steep slopes
• 19% of shoreline    
(12 Km)
• boulder - cobble 
cover on beach  (often 
indicates eroding 
shoreline)
• 10% of shoreline       
(6.5 km)
• moderate to high 
slopes of sediment 
(often eroding)
• Saturna Island has no 
bluff shores
MARSH/FINE SEDIMENT
• low energy shorelines 
with sediment inputs 
from watersheds 
nearby
• 3% of shoreline          
(2 Km)
The Gabriola Island shoreline is largely bedrock and resistant to erosion. There are several sand and shell 
pocket beaches which are very important recreationally, including Taylor, Pilot and Lock Bays as well as Percy 
Anchorage.  The north end of Gabriola Island is exposed to northwesterly wind and waves and the northeast 
side of Gabriola Island is exposed to southeasterly storm winds and waves.  The south side of Gabriola Island 
is protected by Valdes Island to the southeast, and partially protected by Mudge Island and the De Courcy 
group to the south, and by Vancouver Island to the west. Gabriola Island’s only areas of mudflat, which are 
sensitive to human disturbance, are located in Degnen Bay on the southeast end, and to a lesser extent, in 
Silva Bay.  There is a very protected saltmarsh area in Lock Bay, just to the east on the north tip of Gabriola 
Island, completely bounded on the east by a soft sediment (pebble/sand) spit. 
 
01,0002,000500
Met er s
*Shorelines 
modified 
by facility 
development, 
principally boat 
ramps,  seawalls, 
riprap, landfills, 
piers, groynes, or 
breakwaters.
GABRIOLA ISLAND: 
3.1Km (5%) of 
Structurally Altered  
Shoreline
Sections of shoreline 
with significant 
structural alterations 
(>30% altered)
LEGEND: 
structurally altered*
GABRIOLA Is. 
MAP 1 of 3:   Distribution of Shoreline Types

01,0002,000500
Met er s
/
DATE:  October 25, 2011
Refer to Islands Trust Report “Gulf Islands Shoreline Mapping - Project Methodology” July, 2011 for detailed map information. 
1 Km
SEASONAL 
NO

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