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Cowichan Info Page

The Cowichan Watershed drains an area of approximately 939 km2 and flows 47km from its headwaters at Cowichan Lake, among the peaks of the Vancouver Island Ranges, through forests and fields to the estuary at Cowichan Bay. Abounding with diversity and biological value, the Cowichan River was designated a BC Heritage River in 1996 and a Canadian Heritage River in 2003.

The Cowichan River supports a rich variety of biological values that are characteristic of southeastern Vancouver Island. It is considered one of the most valuable and productive salmon and trout streams on Vancouver Island, supporting a host of native fish species including chinook, which are the special focus for this report.

The Cowichan River watershed also provides habitat for an array of wildlife species native to Vancouver Island. Black-tailed deer, black bear and cougar are relatively common, while Roosevelt elk and wolf are more rarely seen. Many small mammals ranging from otter to shrews, beaver, marten, mink, weasel, raccoon, red squirrel, bats, shrews and voles. The valley over 200 species of birds, including osprey, bald eagles, ravens, hawks, owls and ducks. The Cowichan Estuary provides important winter habitat for thousands of waterfowl, is crucial habitat for juvenile salmonids and many other marine fish and invertebrates.

Source: Cowichan Watershed Health & Chinook Initiative

Watershed Data:

fid
27
extrude
0
OBJECTID
113
WS_Area
828.013814678813
Rob_WS_ID
65
Area_km2
828.013814679
MIN_Elev
13
MAX_Elev
1523
MEDIAN_Elev
461
Mean_Lowland
13.0435647732
MEAN
38.043649876
North
265.165
East
189.49375
South
209.01
West
164.335625
Elev_0_300_m
299.090625
Elev_300_900_m
457.15375
Elev_900_m
71.76
Karst_Percent
2.49326991830485
Lake_Watershed_Percent
70.3742238856125
Karmutzen_softer_harder_bedrock
No value
Erodible_Harder_Bedrock
No value
Stream_Order
6
First_Second_B_Ratio
2.18143459915612
Mean_of_all_B_Ratio
1.85456904927375
Total_Length_of_Streams_KM
1648.6129
Drainage_Density
1.99104516225871
Main_Channel_Mean_Slope
11.203738
Basin_Length_KM
63.222
Form_Factor
0.207107728776357
Shape__Area
1909778162.5
Shape__Length
381002.922133935
Karst_km3
20.6446193608
Lake_Watershed_Area
582.708295746