Geography of British Columbia

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Geography of British Columbia
British Columbia
Continent North America
Region Western Canada
Coordinates 48°50′N, 114°03′W --
60°00′N, 139°03′W
Area 944,735 km² (364,764.2 sq mi)
97.9% land
2.1 % water
Borders Total land borders: U.S. states Alaska, Washington, Idaho, Montana; Canadian provinces Alberta, Yukon and Northwest Territories
Highest point Mount Fairweather
4,663 m (15,299 ft)
Lowest point Pacific Ocean
sea level
Longest river Fraser River
1,368 km (850 mi)
Largest lake Williston Lake
1,761 km² (680 sq ft)

British Columbia is the westernmost province of Canada, bordered by the Pacific Ocean. With an area of 944,735 square kilometers (364,764 square miles) it is Canada's third-largest province. The province is nearly four times the size of Great Britain, two and one-half times larger than Japan and larger than every U.S. state except Alaska. It is bound on the northwest by the U.S. state of Alaska, directly north by Yukon and the Northwest Territories, on the east by Alberta, and on the south by the U.S. states of Washington, Idaho, and Montana. The southern border of British Columbia was established by the 1846 Oregon Treaty. The province is dominated by mountain ranges, among them the Canadian Rockies but dominantly the Coast Mountains, Cassiar Mountains and the Columbia Mountains. Most of the population is concentrated on the Pacific coast, notably in the area of Vancouver, located on the southwestern tip of the mainland.

Contents

[edit] Urban areas

British Columbia's capital is Victoria, at the southeast tip of Vancouver Island. Its most populous city is Vancouver. Other major cities include Surrey (the second-largest), Burnaby, Coquitlam, Richmond, Delta, and New Westminster in the Greater Vancouver Regional District (GVRD); Abbotsford, Langley, Maple Ridge, Mission and Chilliwack, in the central and upper Fraser Valley; Nanaimo on Vancouver Island; and Kelowna and Kamloops in the "Interior." Prince George is the major city nearest the centre of the province; however, a small town called Fraser Lake, 150 km to the west, is much nearer the geographic centre.

Ten largest B.C. municipalities by population
Municipality 2006[1] 2001 1996
Vancouver 578,041 545,671 514,008
Surrey 394,976 347,825 304,477
Burnaby 202,799 193,954 179,209
Richmond 174,461 164,345 148,867
Abbotsford 123,864 115,463 104,403
Coquitlam 114,565 112,890 101,820
Saanich 108,265 103,654 101,388
Kelowna 106,707 96,288 89,422
Delta 96,723 96,950 95,411
Langley Township 93,726 86,896 80,179
Ten largest B.C. Urban Areas by population
Urban Area 2001
Vancouver 1,829,854
Victoria 288,346
Abbotsford 129,475
Kelowna 108,330
Nanaimo 77,845
Kamloops 67,952
Prince George 66,239
White Rock 66,157
Chilliwack 51,713
Vernon 39,995
"Urban Areas", as defined by Statistics Canada, are areas of continuous population density, ignoring municipal borders.


[edit] Statistics

See also: Demographics of British Columbia

  • Total area is 944,735 km²
  • Land area is 925,186 km²
  • Water area is 19,549 km² (2.1%)

[edit] Physical geography

[edit] Terrain

The Canadian Rockies and the Inside Passage's fjords provide some of British Columbia's renowned and spectacular scenery. These landforms provide the backdrop and context for a growing outdoor adventure and ecotourism industry. In the southwestern corner of B.C., the Lower Fraser Valley forms a flat, fertile triangle of intensively used land. The Okanagan is one of only three wine-growing regions in Canada and also produces ciders. While exports are minimal, BC wines are highly-prized and ranked well internationally. The city of Penticton and the small towns Oliver, and Osoyoos have some of the warmest summer climates in Canada, although the hottest spots are the towns of Lillooet and Lytton in the Fraser Canyon. Much of Vancouver Island is covered by a temperate rain forest, one of a mere handful of such ecosystems in the world (notable others being on the Olympic Peninsula of Washington and in Chile. One-third of the province consists of barren alpine tundra, icefields, and glaciers.

Sky Pilot Group (L), Tantalus Range (R), part of the Coast Mountains as seen from the Cheakamus Canyon
Sky Pilot Group (L), Tantalus Range (R), part of the Coast Mountains as seen from the Cheakamus Canyon

[edit] Mountains

The younger ranges of the Canadian Rockies were uplifted during the late Cretaceous period (140 million-65 million years ago) and are a relatively new, tall and uneroded mountain range [1], [2]. During the Ice age all of British Columbia was covered by ice (except Queen Charlotte Islands).

B.C.'s Eastern Mountain System comprises the dominant Canadian Rockies, with the Cariboo, Selkirk, Monashee, and Purcell ranges of the Columbia Mountain system in the south. The Canadian Rockies incorporate the Canadian segment of the North American Rocky Mountains range. The southern end in Alberta and British Columbia borders Idaho and Montana of the United States. The northern end is at the Liard Plain in British Columbia.

The Western Mountain System's Coast Mountains are the westernmost range of the Pacific Cordillera, running along the western shore of the North American continent, extending south from the Alaska Panhandle and covering most of coastal British Columbia. The range is covered in dense temperate rainforest on its western exposures, the range rises to heavily glaciated peaks, including the largest temperature-latitude icefields in the world, and then tapers to the dry interior plateau on its eastern flanks, or to the subarctic boreal forest of the Skeena Mountains and Stikine Plateau.

Mount Waddington (4016 m) is the highest mountain within B.C. and Fairweather Mountain in the Saint Elias Mountains on the B.C. and Alaska border has the highest point. Much of the B.C. coast has a fjord scenery, due to the many islands along the Pacific coast being the highest points of a partly submerged mountain range.

British Columbia's principal mountains by range and height
Mountain Height (m) Mountain Height (m)
Saint Elias Mountains Rocky Mountains (cont.)
Fairweather Mountain (highest point on Alaska–B.C. boundary) 4,663 Mount Assiniboine (on Alberta–B.C. boundary) 3,618
Mount Quincy Adams (on Alaska–B.C. boundary) 4,133 Mount Goodsir: North Tower 3,581
Mount Root (on Alaska–B.C. boundary) 3,901 Mount Goodsir: South Tower 3,520
Coast Mountains Snow Dome (on Alberta–B.C. boundary) 3,520
Mount Waddington 4,016 Mount Bryce 3,507
Mount Tiedemann 3,848 Selkirk Mountains
Combatant Mountain 3,756 Mount Sir Sandford 3,522
Asperity Mountain 3,716 Cariboo Mountains
Serra Peaks 3,642 Mount Sir Wilfrid Laurier 3,520
Monarch Mountain 3,459 Purcell Mountains
Rocky Mountains Mount Farnham 3,481
Mount Robson 3,954 Monashee Mountains
Mount Columbia (on Alberta–B.C. boundary) 3,747 Mount Monashee 3,274
Mount Clemenceau 3,642 Hallam Peak 3,205

Sources Statistics Canada, peakbagger.com

[edit] Volcanoes

Main article: Volcanism in Canada
Mount Edziza, a large shield volcano in northwestern British Columbia.
Mount Edziza, a large shield volcano in northwestern British Columbia.

Although little-known to the general public, British Columbia is home to huge area of volcanoes and volcanic activity in the Pacific Ring of Fire.[3] Several mountains that many British Columbians look at every day are dormant volcanoes. Most of them have erupted during the Pleistocene and Holocene. Although none of Canada's volcanoes are currently erupting, several volcanoes, volcanic fields, and volcanic centers are considered potentially active,[4] 49 of which have erupted in the past 10,000 years[5] and many of which have been active in the past two million years. There are hot springs at some volcanoes while 10 volcanoes in British Columbia appear related to seismic activity since 1975, including: Mount Silverthrone, Mount Meager, Wells Gray-Clearwater Volcanic Field, Mount Garibaldi, Mount Cayley, Castle Rock, Lava Fork, Mount Edziza, Hoodoo Mountain and Crow Lagoon.[6] Numerous shield volcanoes developed during the Tertiary period in north-central British Columbia and some were active intermittently to recent times. Mount Edziza and Level Mountain are most spectacular examples. Mount Edziza is a stratovolcano consisting of a basal shield of basaltic flows surmounted by a central vent and flanked by numerous satellite cones, ash beds and blocky lavas. The complex has a long history of volcanic eruption that began about 10 million years ago and ended about 1300 years ago. The volcanoes are grouped into four volcanic belts with different tectonic settings.

The Garibaldi Volcanic Belt is a north-south range of volcanoes in southwestern British Columbia. It is the northern extension of the Cascade Volcanic Arc in the United States and contains the most explosive young volcanoes in Canada. It was formed by subduction of the Juan de Fuca Plate at the Cascadia subduction zone. Eruption styles within the belt range from effusive to explosive, with compositions from basalt to rhyolite. The most recent major catastrophic eruption was the 2350 BP eruption of Mount Meager. It produced a ash column at least 20 km high into the stratosphere and dammed the Lillooet River with breccia.

The Mount Meager volcanic complex as seen from the east near Pemberton, BC. Summits left to right are Capricorn Mountain, Mount Meager, and Plinth Peak.
The Mount Meager volcanic complex as seen from the east near Pemberton, BC. Summits left to right are Capricorn Mountain, Mount Meager, and Plinth Peak.

The Anahim Volcanic Belt is an east-west line of volcanoes. These volcanoes probably formed when the North American Plate moved over the Anahim hotspot. The hotspot is considered similar to the one feeding the Hawaiian Islands. The last volcanic eruption within the belt was about 7000 years ago at a small cinder cone called Nazko Cone.

The Northern Cordilleran Volcanic Province (sometimes called the Stikine Volcanic Belt) is the most active volcanic region in Canada, contaning more than 100 volcanoes. Several eruptions are known to have occurred within this region in the past 400 years and contains Canada's largest volcanoes. It formed as a result of faulting, cracking, rifting and the interaction between the Pacific and the North American plates.

The Chilcotin Plateau Basalts in southern British Columbia is thought to have formed as a result of back-arc extension behind the Cascadia subduction zone.

The Wells Gray-Clearwater Volcanic Field in southeastern British Columbia consists of numerous small, basaltic volcanoes and extensive lava flows. Many indivdual volcanoes in the field have been active for the last 3 million years during which time the region was covered by thick glacial ice at least twice, prior to the well known Fraser Glaciation (also known as the Wisconsin Glaciation). The origin of the volcanism is yet unknown but is probably related to crustal thining. The last eruption in the field was at Kostal Cone in 1500. Volcanism within the field has also created the 465 foot-high Helmcken Falls, which is the fourth highest waterfall in Canada. It owes its foundation to the deposits of volcanic rock that were placed down in the wide valley of the Murtle River. Layer upon layer of fresh lava created flat areas, over which enormous floods flowed during the last ice age. These floods shaped the upright cliff in the lava flows over which the river now flows. The protection of Helmcken Falls was one of the major causes for the development of Wells Gray Provincial Park. As a result, if it had not been for the volcanic eruptions, it is not likely that such a large wilderness region would have been made.

Lakes of British Columbia. See actual size.
Lakes of British Columbia. See actual size.
A portion of Atlin Lake (on the right half of the image) during the winter, as seen from space. The photo illustrates well the elongated lakes in B.C.
A portion of Atlin Lake (on the right half of the image) during the winter, as seen from space. The photo illustrates well the elongated lakes in B.C.

[edit] Water

Fraser River forms an important transportation corridor when it drains much of central and southern British Columbia flowing to the Pacific Ocean. Other major rivers include the upper Columbia River and the Kootenay River. In the northern B.C. the Stikine, Nass and Skeena rivers flow toward the Pacific Ocean, and Peace River flows northeast toward the Arctic Ocean. Hydroelectric resources in B.C. are highly developed with large plants along the rivers operating pulp and paper mills. The Fraser, Nass, and Skeena rivers have not been dammed in order to protect the salmon runs on them. Rivers and their valleys have for a long time provided routes through the mountains for people in B.C. [7]

Long, narrow lakes are found throughout the valleys of the southern and central interior. Among these are Atlin, Kootenay, Okanagan, Quesnel, and Shuswap lakes. Several high dams have impounded large reservoir lakes like Kinbasket Lake, particularly on the Columbia (see Hydroelectric dams on the Columbia River) and Peace rivers. Williston Lake, on the Peace River, is the province’s largest freshwater body.

British Columbia's principal rivers and their tributaries
River Drainage area (km²) Length (km)
Columbia (mouth to head of Columbia Lake) 2,000
(International boundary to head of Columbia Lake) 102,800 801
Kootenay 37,700 780
Kettle (to head of Holmes Lake) 4,700 336
Okanagan (to head of Okanagan Lake) 21,600 314
Fraser 232,300 1,370
Thompson (to head of North Thompson) 55,400 489
North Thompson 20,700 338
South Thompson (to head of Shuswap) 17,800 332
Nechako (to head of Eutsuk Lake) 47,100 462
Stuart (to head of Driftwood) 16,200 415
Skeena 54,400 579
Stikine 49,800 539
Nass 21,100 380
Peace (to head of Finlay) 302,500 1,923
View of Okanagan Lake
View of Okanagan Lake

Source Statistics Canada

British Columbia's principal lakes with relevant information
Lake Area (km²) Altitude (m) Depth (m) Volume (km³)
Williston 1,761 671 166 70.3
Atlin 589 - 775 668 283 54
Kootenay 389 530 154 36.7
Okanagan 351 342 230 24.6
Shuswap 310 347 161 19.1
Quesnel 270 729 >600 -

Sources Statistics Canada, WLD, anglersatlas.com

[edit] Climate

British Columbia's climate is best described as varied. The mountainous terrain causes huge changes climatic conditions over short distances. All winter long the coast is pounded with storm after storm off the Pacific Ocean. The Coastal Mountains block most of the precipitation which forces the majority of the precipitation to fall on the West side of the mountains. In contrast, the leeward side is much drier with some areas are classified as semi-arid. The coast of British Columbia is by far the wettest area in Canada, while the village of Ashcroft located 200 km inland is the driest place in Canada outside of the high arctic.

Coastal British Columbia experiences the mildest winters in Canada were freezing temperatures are infrequent. Victoria, generally considered the mildest city in Canada, has gone the entire year without freezing. Along with the moderating effect of the Pacific Ocean, the mountains impede the flow of the cold arctic air during the winter. The Northeast portion of the province is located on the eastern side of the Rocky Mountains. Without the protection of the mountains, the climate is similar to that found in the neighboring parts of Alberta. The winters are very cold and the summers are relatively warm when compared to other northern parts of British Columbia.

Summer daytime temperatures in the Southwestern Interior the the hottest in Canada. During July, the average daily maximum temperature around Osoyoosand Spence's Bridge is over 29 °C (84.2 °F). This heat combined with little precipitation means the arid animals and vegetation thrive. During the winter temperatures are much colder than Coastal British Columbia, but not milder than almost anywhere else in Canada. Although the Okanagan Valley is spared the copious amounts of precipitation, this area receives some the lowest amounts of bright sunshine during the winter months. This is a result of winter temperature inversions that leave the Southern Interior valleys in a layer of think cloud while the rest of the province basks in sunshine.

More northerly portions of the province's mainland have snowy, cold winters; however, southern portions and Vancouver Island are temperate in many places, where the climate is moderated by the Japan Current of the Pacific Ocean. In the Interior, summer temperatures can be quite warm, even notably hot and there are large semi-arid areas and a few localities classifiable as pocket deserts, including at the towns of Osoyoos and Lillooet. There is more than one spot in British Columbia that has recorded peak summer temperatures of 43.3 °C (110 °F) and an ongoing rivalry exists between the Fraser Canyon towns of Lytton and Lillooet, plus the southern Okanagan Valley town of Osoyoos, for the title of "Canada's Hot Spot". Victoria is ranked as having the mildest climate of any Canadian city, with an average daily temperature of 3° C in January and 16° C in July.

Representative Climate Normals
Zone Average annual temperature Average July daily high Record Max Average January daily low Record Min Average snowfall Average rainfall
North East (Fort Nelson) -0.7 °C 23 °C 36.7 °C -25.6 °C -51.7 °C 177.8 cm 319.8 mm
North West (Dease Lake) -0.8 °C 19.4 °C 35.3 °C -22 °C -51.2 °C 218.4 cm 264.8 mm
Peace (Dawson Creek) 1.6 °C 21.7 °C 34.5 °C -20.6 °C -49.2 °C 174.2 cm 325.6 mm
Central Interior (Prince George) 4.0 °C 22.1 °C 36.0 °C -13.6 °C -50.0 °C 216.1 cm 418.9 mm
North Coast (Prince Rupert) 7.1 °C 16.1 °C 28.7 °C -2.1 °C -24.4 °C 126.3 cm 2468.5 mm
Southwestern Interior (Kamloops) 8.9 °C 28.3 °C 40.6 °C -7.6 °C -37.2 °C 75.5 cm 217.9 mm
Southeastern Interior (Cranbrook) 5.7 °C 25.6 °C 36.6 °C -11.8 °C -40.0 °C 139.9 cm 270.7 mm
South Coast (Vancouver) 10.1 °C 21.7 °C 33.3 °C 0.5 °C -17.8 °C 48.2 cm 1154.7 mm

Source: Environment Canada, Canadian Climate Normals or Averages 1971-2000

City Weather Facts - *Based on the 100 largest cities in Canada
Warmest Annual Temperature Coldest Annual Temperature Sunniest Cloudiest Driest Wettest
City Chiliwack - 10.5 °C Fort St. John - 2.0 °C Cranbrook - 2205 hours Prince Rupert - 1229 hours Kamloops - 279 mm Prince Rupert - 2594 mm

Source: Environment Canada, Weather Winners WebSite

[edit] Parks and Protected Areas

There are 14 designations of parks and protected areas in the province that reflects the different administration and creation of these areas in a modern context. There are 141 ecological Reserves, 35 provincial marine parks, 7 Provincial Heritage Sites, 6 National Historic Sites, 4 National Parks and 3 National Park Reserves. 12.5% (114,000 km²) of BC is currently considered 'protected' under one of the 14 different designations that includes over 800 distinct areas.

British Columbia contains seven of Canada's national parks:

BC also contains a large network of provincial parks, run by BC Parks of the Ministry of Water, Land and Air Protection.

In addition to parks, British Columbia also protects approximately 47,000 square kilometers of agricultural land via the Agricultural Land Reserve.

See also: List of British Columbia Provincial Parks

[edit] Ecoregions

British Columbia's ecosystems are divided on five different levels, each classifying the area on a progressively more detailed basis. At the top level, ecodomains delineate areas of broad climatic uniformity across the world. The ecodomains are then divided into ecodivisions which delineate areas of broad climatic and physiographic uniformity. Next, the ecodivisions are divided into ecoprovinces which consider climate, oceanography, relief and regional landforms. The ecoprovinces are then divided into ecoregions which consider major physiographic and minor macroclimatic or oceanographic variations. Finally, the ecoregions are divided into ecosections for minor physiographic and macroclimatic or oceanographic variations. Overall, B.C. is divided into 4 large ecodomain areas which are progressively divided down into 114 small ecosections.

[edit] Biogeoclimatic Zones of British Columbia1

1: Cameron Young, The Forests of British Columbia (North Vancouver: Whitecap Books, 1985); R.C. Hosie, Native Trees of Canada, seventh edition (Ottawa: Canadian Forestry Service, 1969)

[edit] Political geography

British Columbia is divided into defined regions for three political purposes. One is for the purpose of providing local government services. This involves municipalities, which are incorporated areas, and regional districts, which are federations of member municipalities and rural areas. Another purpose is for the provision of provincial services. The provincial government has dividing certain services into regional services, such as health authorities and agricultural commissions, which administer specified regions according to their own policies. The province is also divided to provide electoral districts by Elections BC for provincial elections and Elections Canada for federal elections. In addition to these, Indian Reserves have been established throughout the province but are administered by the federal government.

[edit] Local government

In order to fund community-wide services, such as a sewer system, urban areas incorporate to form municipalities. The vast majority of British Columbians live in these municipalities but there are also large areas of unincorporated rural areas around the municipalities. In 1964 the provincial government created regional districts, through amendments to the Municipal Act, to better coordinate regional issues and provide community services to unincorporated areas. Only one area, the sparsely populated Stikine Region in northwest B.C., is not covered by a regional district. It has a population of 1,352 people but covers an area of 135,391 square kilometers with no municipalities within its borders. All the regional districts and municipalities are members of the Union of British Columbia Municipalities

[edit] Regional districts

Regional district borders
Regional district borders

British Columbia is carved into 27 regional districts. These regional districts are federations of member municipalities and electoral areas. The unincorporated area of the regional district is carved into electoral areas. Each electoral area elects one director who sits on the Regional Board and the Electoral Area Directors Committee. The Islands Trust acts similar to a regional district for several unincorporated islands between the Lower Mainland and Vancouver Island.

The regional districts are used to provide local government services (e.g. building inspection) to unincorporated areas, sub-regional services (e.g. street bridge over a border) between two or more members, and regional services (e.g. funding the regional hospital district) required for the entire area. Also, as a collection of municipalities they are able to borrow funds for capital projects at lower interest rates.

[edit] Municipalities

There are 153 municipalities in British Columbia. They are divided into cities, districts, towns and villages, according to their population at the time of their incorporation. There are also three other municipalities that were incorporated for special purposes. These are the Resort Municipality of Whistler, Sechelt Indian Government District, and Bowen Island Municipality. With the exception of the City of Vancouver all municipalities attain their legislative powers from the Local Government Act (formerly the Municipal Act), which is being replaced, in phases, by the Community Charter. Vancouver obtains its legislative authority from the Vancouver Charter.

[edit] Provincial politics

2005 general election, popular vote by electoral districts
2005 general election, popular vote by electoral districts

For representation in the Legislative Assembly B.C. is carved into 79 electoral districts. Each one of these ridings elects one candidate to become its Member of the Legislative Assembly (MLA) in a first past the post race contained within the electoral district. In the last general election, in May 2005, three political parties, the British Columbia Liberal Party, New Democratic Party of British Columbia and the Green Party of British Columbia all ran one candidate in each electoral district while 22 other minor parties, as well as 23 independents, ran at least one candidate in an electoral district. However, the results produced a two party system wherein the two major parties, the right-wing B.C. Liberal Party and the left-wing New Democratic Party of B.C., won all the electoral districts. The B.C. Liberals have dominated provincial politics since 2001 when they won. 77 of 79 seats.The B.C. New Democraic Party still won the other two ridings left. The right-wing predecessor of the B.C. Liberal Party, the B.C. Social Credit Party, dominated provincial politics for much of the latter part of the twentieth century. The right-wing parties draw their support from the Lower Mainland suburbs (like Langley, Abbotsford, etc.), Kelowna, Kamloops, and northeastern B.C. The New Democratic Party has traditionally drawn its support from more urbanized areas such as Vancouver and Victoria, as well as northwestern B.C, and the mining towns of the Kootenays and key areas of Vancouver Island. Swing areas include the B.C. Interior, certain urban areas within the Lower Mainland (like Surrey) and certain rural areas (like in southeastern B.C.)

[edit] External links

[edit] References