The Okanogan–Wenatchee National Forest is a U.S. National Forest located in Okanogan County in north-central Washington , United States.
94-844: The 1,499,013-acre (2,342.208 sq mi; 6,066.29 km) forest is bordered on the north by British Columbia , on the east by Colville National Forest , on the south by the divide between the Methow and the Stehekin – Lake Chelan valleys, and on the west by North Cascades National Park . The closest significant communities are Omak and Okanogan . Managed by the United States Forest Service together with Wenatchee National Forest , its headquarters are in Wenatchee . There are local ranger district offices located in Tonasket and Winthrop . It
188-621: A humid continental climate with widely variable precipitation. For example, the average daily low in Prince George (roughly in the middle of the province) in January is −12 °C (10 °F). Small towns in the southern interior with high elevation such as Princeton are typically colder and snowier than cities in the valleys. Heavy snowfall occurs in all elevated mountainous terrain providing bases for skiers in both south and central British Columbia. Annual snowfall on highway mountain passes in
282-476: A lake or ocean . A basin is separated from adjacent basins by a perimeter, the drainage divide , made up of a succession of elevated features, such as ridges and hills . A basin may consist of smaller basins that merge at river confluences , forming a hierarchical pattern . Other terms for a drainage basin are catchment area , catchment basin , drainage area , river basin , water basin , and impluvium . In North America, they are commonly called
376-484: A sink , which may be a permanent lake, a dry lake , or a point where surface water is lost underground . Drainage basins are similar but not identical to hydrologic units , which are drainage areas delineated so as to nest into a multi-level hierarchical drainage system . Hydrologic units are defined to allow multiple inlets, outlets, or sinks. In a strict sense, all drainage basins are hydrologic units but not all hydrologic units are drainage basins. About 48.71% of
470-414: A watershed , though in other English-speaking places, "watershed" is used only in its original sense, that of the drainage divide line. A drainage basin's boundaries are determined by watershed delineation , a common task in environmental engineering and science. In a closed drainage basin, or endorheic basin , rather than flowing to the ocean, water converges toward the interior of the basin, known as
564-457: A diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, forests, lakes, mountains, inland deserts and grassy plains. British Columbia borders the province of Alberta to the east; the territories of Yukon and Northwest Territories to the north; the U.S. states of Washington , Idaho and Montana to the south, and Alaska to the northwest. With an estimated population of over 5.6 million as of 2024, it
658-449: A drainage basin, and there are different ways to interpret that data. In the unlikely event that the gauges are many and evenly distributed over an area of uniform precipitation, using the arithmetic mean method will give good results. In the Thiessen polygon method, the drainage basin is divided into polygons with the rain gauge in the middle of each polygon assumed to be representative for
752-540: A drainage boundary is referred to as watershed delineation . Finding the area and extent of a drainage basin is an important step in many areas of science and engineering. Most of the water that discharges from the basin outlet originated as precipitation falling on the basin. A portion of the water that enters the groundwater system beneath the drainage basin may flow towards the outlet of another drainage basin because groundwater flow directions do not always match those of their overlying drainage network. Measurement of
846-646: A portion of the Washington National Forest , and was named after the city of Chelan , where its headquarters were. The forest's initial area of 1,732,820 acres (701,250 ha) extended from the northern Okanogan River near the Canada–United States border to divide the Lake Chelan and Entiat watersheds to the southern Cascade Crest . On July 1, 1911, the forest partly transformed into Okanogan National Forest. However, Chelan National Forest
940-516: A series of devastating epidemics of diseases the people had no immunity to. The population dramatically collapsed, culminating in the 1862 smallpox outbreak in Victoria that spread throughout the coast. European settlement did not bode well for the remaining native population of British Columbia. Colonial officials deemed colonists could make better use of the land than the First Nations people, and thus
1034-827: A small island off the coast of Haida Gwaii . Many healthy populations of fish are present, including salmonids such as several species of salmon , trout , steelhead , and char . Besides salmon and trout, sport-fishers in BC also catch halibut , bass , and sturgeon . On the coast, harbour seals and river otters are common. Cetacean species native to the coast include the orca , humpback whale , grey whale , harbour porpoise , Dall's porpoise , Pacific white-sided dolphin and minke whale . Some endangered species in British Columbia are: Vancouver Island marmot , spotted owl , American white pelican , and badgers. White spruce or Engelmann spruce and their hybrids occur in 12 of
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#17328691184221128-655: A very wide range of birds, has long been popular. Bears ( grizzly , black —including the Kermode bear or spirit bear) live here, as do deer , elk , moose , caribou , big-horn sheep , mountain goats , marmots , beavers , muskrats , coyotes , wolves , mustelids (such as wolverines , badgers and fishers ), cougars , eagles , ospreys , herons , Canada geese , swans , loons , hawks , owls , ravens , harlequin ducks , and many other sorts of ducks. Smaller birds ( robins , jays , grosbeaks , chickadees , and so on) also abound. Murrelets are known from Frederick Island,
1222-455: A wholly unorganized area of British North America under the de facto jurisdiction of HBC administrators; however, unlike Rupert's Land to the north and east, the territory was not a concession to the company. Rather, it was simply granted a monopoly to trade with the First Nations inhabitants. All that was changed with the westward extension of American exploration and the concomitant overlapping claims of territorial sovereignty, especially in
1316-568: Is Canada's third-most populous province . The capital of British Columbia is Victoria , while the province's largest city is Vancouver . Vancouver and its suburbs together make up the third-largest metropolitan area in Canada , with the 2021 census recording 2.6 million people in Metro Vancouver . British Columbia is Canada's third-largest province in terms of total area, after Quebec and Ontario . The first known human inhabitants of
1410-578: Is a significant centre for maritime trade : the Port of Vancouver is the largest port in Canada and the most diversified port in North America . Although less than 5 percent of the province's territory is arable land , significant agriculture exists in the Fraser Valley and Okanagan due to the warmer climate. British Columbia is home to 45% of all publicly listed companies in Canada. The province's name
1504-548: Is generally in the subarctic climate zone, but even there, milder air can penetrate far inland. The coldest temperature in British Columbia was recorded in Smith River , where it dropped to −58.9 °C (−74.0 °F) on January 31, 1947, one of the coldest readings recorded anywhere in North America. Atlin in the province's far northwest, along with the adjoining Southern Lakes region of Yukon , get midwinter thaws caused by
1598-485: Is home to First Nations groups that have a deep history with a significant number of indigenous languages. There are more than 200 First Nations in BC. Prior to contact (with non-Aboriginal people), human history is known from oral histories, archaeological investigations, and from early records from explorers encountering societies early in the period. The arrival of Paleoindians from Beringia took place between 20,000 and 12,000 years ago. Hunter-gatherer families were
1692-406: Is home to at least 34 distinct Indigenous languages . Major sectors of British Columbia's economy include forestry , mining , filmmaking and video production , tourism , real estate , construction , wholesale , and retail . Its main exports include lumber and timber , pulp and paper products, copper , coal , and natural gas . British Columbia exhibits high property values and
1786-528: Is now the United States include Vancouver, Washington ( Fort Vancouver ), formerly the "capital" of Hudson's Bay operations in the Columbia District, Colville, Washington and Walla Walla, Washington (old Fort Nez Percés ). With the amalgamation of the two fur trading companies in 1821, modern-day British Columbia existed in three fur trading departments. The bulk of the central and northern interior
1880-480: Is referred to as " watershed management ". In Brazil , the National Policy of Water Resources, regulated by Act n° 9.433 of 1997, establishes the drainage basin as the territorial division of Brazilian water management. When a river basin crosses at least one political border, either a border within a nation or an international boundary, it is identified as a transboundary river . Management of such basins becomes
1974-600: Is the Dead Sea . Drainage basins have been historically important for determining territorial boundaries, particularly in regions where trade by water has been important. For example, the English crown gave the Hudson's Bay Company a monopoly on the fur trade in the entire Hudson Bay basin, an area called Rupert's Land . Bioregional political organization today includes agreements of states (e.g., international treaties and, within
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#17328691184222068-462: Is the only province in Canada that borders the Pacific Ocean. British Columbia's highest mountain is Mount Fairweather ; the highest mountain entirely within the province is Mount Waddington . British Columbia's capital is Victoria , located at the southeastern tip of Vancouver Island . Only a narrow strip of Vancouver Island, from Campbell River to Victoria, is significantly populated. Much of
2162-711: Is the second-largest national forest (after the Nez Perce National Forest in Idaho ) that is contained entirely within one county and largest of which in Washington. Most of the Pasayten Wilderness (excluding its westernmost part, which lies in the Mount Baker-Snoqualmie National Forest ), and the northeast portion (about 63%) of Lake Chelan-Sawtooth Wilderness are part of the forest, with
2256-656: The British Columbia Terms of Union . British Columbia is a diverse and cosmopolitan province, drawing on a plethora of cultural influences from its British Canadian , European , and Asian diasporas , as well as the Indigenous population . Though the province's ethnic majority originates from the British Isles , many British Columbians also trace their ancestors to continental Europe , East Asia , and South Asia . Indigenous Canadians constitute about 6 percent of
2350-682: The African Great Lakes , the interiors of Australia and the Arabian Peninsula , and parts in Mexico and the Andes . Some of these, such as the Great Basin, are not single drainage basins but collections of separate, adjacent closed basins. In endorheic bodies of water where evaporation is the primary means of water loss, the water is typically more saline than the oceans. An extreme example of this
2444-1042: The Chinook effect, which is also common (and much warmer) in more southerly parts of the Interior. During winter on the coast, rainfall , sometimes relentless heavy rain, dominates because of consistent barrages of cyclonic low-pressure systems from the North Pacific. Average snowfall on the coast during a normal winter is between 25 and 50 centimetres (10 and 20 in), but on occasion (and not every winter) heavy snowfalls with more than 20 centimetres (8 in) and well below freezing temperatures arrive when modified arctic air reaches coastal areas, typically for short periods, and can take temperatures below −10 °C (14 °F), even at sea level. Arctic outflow winds can occasionally result in wind chill temperatures at or even below −17.8 °C (0.0 °F). While winters are very wet, coastal areas are generally milder and dry during summer under
2538-664: The Columbia in the name Columbia Rediviva came from the name Columbia for the New World or parts thereof , a reference to Christopher Columbus . The governments of Canada and British Columbia recognize Colombie-Britannique as the French name for the province. British Columbia is bordered to the west by the Pacific Ocean and the American state of Alaska , to the north by Yukon and
2632-681: The Continental Divide , northern Alaska and parts of North Dakota , South Dakota , Minnesota , and Montana in the United States, the north shore of the Scandinavian peninsula in Europe, central and northern Russia, and parts of Kazakhstan and Mongolia in Asia , which totals to about 17% of the world's land. Just over 13% of the land in the world drains to the Pacific Ocean . Its basin includes much of China, eastern and southeastern Russia, Japan,
2726-638: The Dakelh (Carrier) and the Tsilhqotʼin . The inlets and valleys of the British Columbia coast shelter large, distinctive populations, such as the Haida , Kwakwakaʼwakw and Nuu-chah-nulth , sustained by the region's abundant salmon and shellfish. These peoples developed complex cultures dependent on the western red cedar that included wooden houses, seagoing whaling and war canoes and elaborately carved potlatch items and totem poles . Contact with Europeans brought
2820-578: The Fraser Canyon , close to the confluence of the Fraser and Thompson rivers, where the terrain is rugged and covered with desert-type flora. Semi-desert grassland is found in large areas of the Interior Plateau , with land uses ranging from ranching at lower altitudes to forestry at higher ones. The northern, mostly mountainous, two-thirds of the province is largely unpopulated and undeveloped, except for
2914-460: The Inside Passage 's many inlets provide some of British Columbia's renowned and spectacular scenery, which forms the backdrop and context for a growing outdoor adventure and ecotourism industry. 75 percent of the province is mountainous (more than 1,000 m [3,300 ft] above sea level ); 60 percent is forested; and only about 5 percent is arable. The province's mainland away from
Okanogan–Wenatchee National Forest - Misplaced Pages Continue
3008-681: The Korean Peninsula , most of Indochina, Indonesia and Malaysia, the Philippines, all of the Pacific Islands , the northeast coast of Australia , and Canada and the United States west of the Continental Divide (including most of Alaska), as well as western Central America and South America west of the Andes. The Indian Ocean 's drainage basin also comprises about 13% of Earth's land. It drains
3102-520: The North Coast just south of Southeast Alaska . The exception to British Columbia's wet and cloudy winters is during the El Niño phase. During El Niño events, the jet stream is much farther south across North America, making the province's winters milder and drier than normal. Winters are much wetter and cooler during the opposite phase, La Niña . There are 14 designations of parks and protected areas in
3196-664: The North West Company and the Hudson's Bay Company (HBC), effectively established a permanent British presence in the region. The Columbia District was broadly defined as being south of 54°40 north latitude, (the southern limit of Russian America ), north of Mexican-controlled California, and west of the Rocky Mountains . It was, by the Anglo-American Convention of 1818 , under the "joint occupancy and use" of citizens of
3290-649: The Northwest Territories , to the east by the province of Alberta , and to the south by the American states of Washington , Idaho , and Montana . The southern border of British Columbia was established by the 1846 Oregon Treaty, although its history is tied with lands as far south as California . British Columbia's land area is 944,735 square kilometres (364,800 sq mi). British Columbia's rugged coastline stretches for more than 27,000 kilometres (17,000 mi), and includes deep, mountainous fjords and about 6,000 islands, most of which are uninhabited. It
3384-574: The Oroville–Osoyoos Border Crossing , is one of several wine and cider -producing regions in Canada. Other wine regions in British Columbia include the Cowichan Valley on Vancouver Island and the Fraser Valley . The Southern Interior cities of Kamloops and Penticton have some of the warmest and longest summer climates in Canada (while higher elevations are cold and snowy), although their temperatures are often exceeded north of
3478-550: The Royal Engineers, Columbia Detachment , in response to the Fraser Canyon Gold Rush . Moody selected the site for and founded the mainland colony's capital New Westminster . The colonies of Vancouver Island and British Columbia were incorporated in 1866, subsequent to which Victoria became the united colony's capital. In 1871, British Columbia entered Confederation as the sixth province of Canada, in enactment of
3572-608: The fur trade , rather than political considerations. In 1794, by the third of a series of agreements known as the Nootka Conventions , Spain conceded its claims of exclusivity in the Pacific. This opened the way for formal claims and colonization by other powers, including Britain, but because of the Napoleonic Wars , there was little British action on its claims in the region until later. The establishment of trading posts by
3666-1101: The 14 biogeoclimatic zones of British Columbia . Common types of trees present in BC's forests include western redcedar , yellow-cedar , Rocky Mountain juniper , lodgepole pine , ponderosa or yellow pine , whitebark pine , limber pine , western white pine , western larch , tamarack , alpine larch , white spruce , Engelmann spruce , Sitka spruce , black spruce , grand fir , Amabilis fir , subalpine fir , western hemlock , mountain hemlock , Douglas-fir , western yew , Pacific dogwood , bigleaf maple , Douglas maple , vine maple , arbutus , black hawthorn , cascara , Garry oak , Pacific crab apple , choke cherry , pin cherry , bitter cherry , red alder , mountain alder , paper birch , water birch , black cottonwood , balsam poplar , trembling aspen . First Nations peoples of British Columbia used plants for food, and to produce material goods like fuel and building products. Plant foods included berries, and roots like camas . Environment Canada subdivides British Columbia into six ecozones : The area now known as British Columbia
3760-577: The 14 different designations that includes over 800 distinct areas. British Columbia contains seven of Canada's national parks and National Park Reserves: British Columbia contains a large number of provincial parks , run by BC Parks under the aegis of the Ministry of Environment. British Columbia's provincial parks system is the second largest parks system in Canada, the largest being Canada's National Parks system. Another tier of parks in British Columbia are regional parks , which are maintained and run by
3854-634: The Conconully Ranger District was reverted. In 1968, the Pasayten Wilderness was established, introducing over 200,000 acres (81,000 ha) to the forest. The United States Congress designated almost 65 percent of the forest's area as the Lake Chelan-Sawtooth Wilderness under the National Wilderness Preservation System around 1984, upon land formerly occupied by the former Chelan Division of
Okanogan–Wenatchee National Forest - Misplaced Pages Continue
3948-654: The Interior during mid-summer, with the record high of 49.6 °C (121.3 °F) being held in Lytton on June 29, 2021, during a record-breaking heat wave that year . The extended summer dryness often creates conditions that spark forest fires, from dry-lightning or man-made causes. Many areas of the province are often covered by a blanket of heavy cloud and low fog during the winter months, in contrast to abundant summer sunshine. Annual sunshine hours vary from 2200 near Cranbrook and Victoria to less than 1300 in Prince Rupert , on
4042-782: The Loomis Ranger District, along with the Sweat Creek Ranger District, absorbed to become the Loomis State Forest, later abandoned. The forest's ranger area underwent a number of smaller changes until the mid-1940s. The Squaw Creek Ranger District was absorbed by the Twisp Ranger District in the early 1930s, while the Forest Service Monument 83 lookout was constructed in neighboring British Columbia as an accident. The Pasayten Ranger District
4136-637: The Okanogan National Forest. Notable fires include the 2006 Tripod Complex , the 2014 Carlton Complex and the 2015 Okanogan Complex fires. The Okanogan National Forest was established on July 1, 1911, from a portion of the Chelan National Forest . On July 1, 1921, the entire forest was transferred back to the Chelan National Forest, but on March 23, 1955, the transfer was reverted. The Okanogan National Forest
4230-536: The Pacific Ocean, inscribing a stone marking his accomplishment on the shoreline of Dean Channel near Bella Coola . His expedition theoretically established British sovereignty inland, and a succession of other fur company explorers charted the maze of rivers and mountain ranges between the Canadian Prairies and the Pacific. Mackenzie and other explorers—notably John Finlay , Simon Fraser , Samuel Black , and David Thompson —were primarily concerned with extending
4324-643: The President the authority to establish forest reserves for the United States Department of the Interior . After passage of the Transfer Act of 1905 , forest reserves became part of the United States Department of Agriculture in the newly created United States Forest Service. The Chelan National Forest was established by the Forest Service on July 1, 1908, from 2,492,500 acres (1,008,700 ha) from
4418-417: The US, interstate compacts ) or other political entities in a particular drainage basin to manage the body or bodies of water into which it drains. Examples of such interstate compacts are the Great Lakes Commission and the Tahoe Regional Planning Agency . In hydrology , the drainage basin is a logical unit of focus for studying the movement of water within the hydrological cycle . The process of finding
4512-664: The United States and subjects of Britain (which is to say, the fur companies). This co-occupancy was ended with the Oregon Treaty of 1846. The major supply route was the York Factory Express between Hudson Bay and Fort Vancouver . Some of the early outposts grew into settlements, communities, and cities. Among the places in British Columbia that began as fur trading posts are Fort St. John (established 1794); Hudson's Hope (1805); Fort Nelson (1805); Fort St. James (1806); Prince George (1807); Kamloops (1812); Fort Langley (1827); Fort Victoria (1843); Yale (1848); and Nanaimo (1853). Fur company posts that became cities in what
4606-405: The Washington Forest Reserve. The first forest supervisor of Wenatchee National Forest was Albert H. Sylvester , who named over a thousand natural features in the region. British Columbia British Columbia (commonly abbreviated as BC ) is the westernmost province of Canada . Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains , the province has
4700-484: The area east of the Rockies , where the Peace River Country contains BC's portion of the Canadian Prairies , centred at the city of Dawson Creek . British Columbia is considered part of the Pacific Northwest and the Cascadia bioregion , along with the American states of Alaska, Idaho, (western) Montana, Oregon , Washington, and (northern) California . Because of the many mountain ranges and rugged coastline, British Columbia's climate varies dramatically across
4794-448: The area settled in British Columbia at least 10,000 years ago. Such groups include the Coast Salish , Tsilhqotʼin , and Haida peoples, among many others. One of the earliest British settlements in the area was Fort Victoria , established in 1843, which gave rise to the city of Victoria, the capital of the Colony of Vancouver Island . The Colony of British Columbia (1858–1866) was subsequently founded by Richard Clement Moody , and by
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#17328691184224888-455: The balance lying in the Mount Baker-Snoqualmie National Forest. The western part of the forest is wetter than the dry and less temperate east. The vegetation varies similarly, from the western boreal forest , to the eastern high-elevation steppe . A 1993 Forest Service study estimated that the extent of old growth in the forest was 316,000 acres (128,000 ha), a majority of which was lodgepole pine forests. Wildfires are not uncommon in
4982-406: The basin, it can form tributaries that change the structure of the land. There are three different main types, which are affected by the rocks and ground underneath. Rock that is quick to erode forms dendritic patterns, and these are seen most often. The two other types of patterns that form are trellis patterns and rectangular patterns. Rain gauge data is used to measure total precipitation over
5076-429: The blocking presence of successive mountain ranges, the climate of some of the interior valleys of the province (such as the Thompson, parts of the Fraser Canyon, the southern Cariboo and parts of the Okanagan) is semi-arid with certain locations receiving less than 250 millimetres (10 in) in annual precipitation. The annual mean temperature in the most populated areas of the province is up to 12 °C (54 °F),
5170-429: The coast in 1775. In doing so, Pérez and Quadra reasserted the Spanish claim for the Pacific coast , first made by Vasco Núñez de Balboa in 1513. The explorations of James Cook in 1778 and George Vancouver in 1792 and 1793 established British jurisdiction over the coastal area north and west of the Columbia River. In 1793, Sir Alexander Mackenzie was the first European to journey across North America overland to
5264-426: The coastal regions is somewhat moderated by the Pacific Ocean. Terrain ranges from dry inland forests and semi-arid valleys, to the range and canyon districts of the Central and Southern Interior , to boreal forest and subarctic prairie in the Northern Interior. High mountain regions both north and south have subalpine flora and subalpine climate . The Okanagan wine area , extending from Vernon to Osoyoos at
5358-430: The discharge of water from a basin may be made by a stream gauge located at the basin's outlet. Depending on the conditions of the drainage basin, as rainfall occurs some of it seeps directly into the ground. This water will either remain underground, slowly making its way downhill and eventually reaching the basin, or it will permeate deeper into the soil and consolidate into groundwater aquifers. As water flows through
5452-441: The drainage area is dependent on the soil type. Certain soil types such as sandy soils are very free-draining, and rainfall on sandy soil is likely to be absorbed by the ground. However, soils containing clay can be almost impermeable and therefore rainfall on clay soils will run off and contribute to flood volumes. After prolonged rainfall even free-draining soils can become saturated , meaning that any further rainfall will reach
5546-642: The drainage basin to the mouth, and may accumulate there, disturbing the natural mineral balance. This can cause eutrophication where plant growth is accelerated by the additional material. Because drainage basins are coherent entities in a hydrological sense, it has become common to manage water resources on the basis of individual basins. In the U.S. state of Minnesota , governmental entities that perform this function are called " watershed districts ". In New Zealand, they are called catchment boards. Comparable community groups based in Ontario, Canada, are called conservation authorities . In North America, this function
5640-432: The eastern coast of Africa, the coasts of the Red Sea and the Persian Gulf , the Indian subcontinent , Burma, and most parts of Australia . The five largest river basins (by area), from largest to smallest, are those of the Amazon (7 million km ), the Congo (4 million km ), the Nile (3.4 million km ), the Mississippi (3.22 million km ), and the Río de la Plata (3.17 million km ). The three rivers that drain
5734-412: The greatest portion of western Sub-Saharan Africa , as well as Western Sahara and part of Morocco . The two major mediterranean seas of the world also flow to the Atlantic. The Caribbean Sea and Gulf of Mexico basin includes most of the U.S. interior between the Appalachian and Rocky Mountains , a small part of the Canadian provinces of Alberta and Saskatchewan , eastern Central America ,
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#17328691184225828-435: The ground and along rivers it can pick up nutrients , sediment , and pollutants . With the water, they are transported towards the outlet of the basin, and can affect the ecological processes along the way as well as in the receiving water body . Modern use of artificial fertilizers , containing nitrogen (as nitrates ), phosphorus , and potassium , has affected the mouths of drainage basins. The minerals are carried by
5922-422: The ground at its terminus, the area can go by several names, such playa, salt flat, dry lake , or alkali sink . The largest endorheic basins are in Central Asia , including the Caspian Sea , the Aral Sea , and numerous smaller lakes. Other endorheic regions include the Great Basin in the United States, much of the Sahara Desert , the drainage basin of the Okavango River ( Kalahari Basin ), highlands near
6016-427: The influence of stable anti-cyclonic high pressure. Southern Interior valleys are hot in summer; for example, in Osoyoos , the July maximum temperature averages 31.7 °C (89.1 °F), making it the hottest month of any location in Canada; this hot weather sometimes spreads towards the coast or to the far north of the province. Temperatures often exceed 40 °C (104 °F) in the lower elevations of valleys in
6110-425: The islands of southern Alaska and northern British Columbia. The Na-Dene language group is believed to be linked to the Yeniseian languages of Siberia: the Dene of the western Arctic may represent a distinct wave of migration from Asia to North America. The Interior of British Columbia is home to the Salishan language groups such as the Shuswap (Secwepemc) , Okanagan and Athabaskan language groups, primarily
6204-417: The islands of the Caribbean and the Gulf, and a small part of northern South America. The Mediterranean Sea basin, with the Black Sea , includes much of North Africa , east-central Africa (through the Nile River ), Southern , Central, and Eastern Europe , Turkey , and the coastal areas of Israel , Lebanon , and Syria . The Arctic Ocean drains most of Western Canada and Northern Canada east of
6298-423: The land should be owned by the colonists. To ensure colonists would be able to settle properly and make use of the land, First Nations were forcibly relocated onto reserves , which were often too small to support their way of life. By the 1930s, British Columbia had over 1500 reserves. Lands now known as British Columbia were added to the British Empire during the 19th century. Colonies originally begun with
6392-559: The main social structure from 10,000 to 5,000 years ago. The nomadic population lived in non-permanent structures foraging for nuts, berries and edible roots while hunting and trapping larger and small game for food and furs. Around 5,000 years ago individual groups started to focus on resources available to them locally. Coast Salish peoples had complex land management practices linked to ecosystem health and resilience. Forest gardens on Canada's northwest coast included crabapple, hazelnut, cranberry, wild plum, and wild cherry species. Thus with
6486-429: The mildest anywhere in Canada. The valleys of the Southern Interior have short winters with only brief bouts of cold or infrequent heavy snow, while those in the Cariboo , in the Central Interior , are colder because of increased altitude and latitude, but without the intensity or duration experienced at similar latitudes elsewhere in Canada. Outside of the driest valleys, the Southern and Central Interior generally have
6580-409: The most water, from most to least, are the Amazon, Ganges , and Congo rivers. Endorheic basin are inland basins that do not drain to an ocean. Endorheic basins cover around 18% of the Earth's land. Some endorheic basins drain to an Endorheic lake or Inland sea . Many of these lakes are ephemeral or vary dramatically in size depending on climate and inflow. If water evaporates or infiltrates into
6674-410: The native population of what became British Columbia. The arrival of Europeans began around the mid-18th century, as fur traders entered the area to harvest sea otters . While it is thought Sir Francis Drake may have explored the British Columbian coast in 1579, it was Juan Pérez who completed the first documented voyage, which took place in 1774. Juan Francisco de la Bodega y Quadra explored
6768-565: The passage of time there is a pattern of increasing regional generalization with a more sedentary lifestyle . These indigenous populations evolved over the next 5,000 years across a large area into many groups with shared traditions and customs. To the northwest of the province are the peoples of the Na-Dene languages , which include the Athapaskan-speaking peoples and the Tlingit , who live on
6862-401: The province that reflect 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 of Canada , 4 national parks and 3 national park reserves. 12.5 percent of the province's area (114,000 km or 44,000 sq mi) is considered protected under one of
6956-525: The province's regional districts . The Ministry of Forests operates forest recreation sites. In addition to these areas, over 47,000 square kilometres (18,000 sq mi) of arable land are protected by the Agricultural Land Reserve . Much of the province is undeveloped, so populations of many mammalian species that have become rare in much of the United States still flourish in British Columbia. Watching animals of various sorts, including
7050-601: The province's total population. Christianity is the largest religion in the region, though the majority of the population is non-religious. English is the common language of the province, although Punjabi , Mandarin Chinese , and Cantonese also have a large presence in the Metro Vancouver region. The Franco-Columbian community is an officially recognized linguistic minority, and around one percent of British Columbians claim French as their mother tongue . British Columbia
7144-552: The province. Coastal southern British Columbia has a mild and rainy climate influenced by the North Pacific Current . Most of the region is classified as oceanic , though pockets of warm-summer Mediterranean climate also exist in the far-southern parts of the coast. Precipitation averages above 1,000 mm (39 in) in almost all of the coastal region, and Hucuktlis Lake on Vancouver Island receives an average of 6,903 mm (271.8 in) of rain annually. Due to
7238-418: The rainfall on the area of land included in its polygon. These polygons are made by drawing lines between gauges, then making perpendicular bisectors of those lines form the polygons. The isohyetal method involves contours of equal precipitation are drawn over the gauges on a map. Calculating the area between these curves and adding up the volume of water is time-consuming. Isochrone maps can be used to show
7332-625: The responsibility of the countries sharing it. Nile Basin Initiative , OMVS for Senegal River , Mekong River Commission are a few examples of arrangements involving management of shared river basins. Management of shared drainage basins is also seen as a way to build lasting peaceful relationships among countries. The catchment is the most significant factor determining the amount or likelihood of flooding . Catchment factors are: topography , shape, size, soil type, and land use (paved or roofed areas). Catchment topography and shape determine
7426-461: The river rather than being absorbed by the ground. If the surface is impermeable the precipitation will create surface run-off which will lead to higher risk of flooding; if the ground is permeable, the precipitation will infiltrate the soil. Land use can contribute to the volume of water reaching the river, in a similar way to clay soils. For example, rainfall on roofs, pavements , and roads will be collected by rivers with almost no absorption into
7520-581: The southern Columbia Basin (within present day Washington and Oregon ). In 1846, the Oregon Treaty divided the territory along the 49th parallel to the Strait of Georgia , with the area south of this boundary (excluding Vancouver Island and the Gulf Islands ) transferred to sole American sovereignty. The Colony of Vancouver Island was created in 1849, with Victoria designated as the capital. New Caledonia, as
7614-464: The southern interior rivals some of the snowiest cities in Canada, and freezing rain and fog are sometimes present on such roads as well. This can result in hazardous driving conditions, as people are usually travelling between warmer areas such as Vancouver or Kamloops , and may be unaware that the conditions may be slippery and cold. Winters are generally severe in the Northern Interior which
7708-418: The speed with which the runoff reaches a river. A long thin catchment will take longer to drain than a circular catchment. Size will help determine the amount of water reaching the river, as the larger the catchment the greater the potential for flooding. It is also determined on the basis of length and width of the drainage basin. Soil type will help determine how much water reaches the river. The runoff from
7802-543: The support of the Hudson's Bay Company (Vancouver Island, the mainland) were amalgamated, then entered Confederation as British Columbia in 1871 as part of the Dominion of Canada. During the 1770s, smallpox killed at least 30 percent of the Pacific Northwest First Nations . This devastating epidemic was the first in a series; the 1862 Pacific Northwest smallpox epidemic killed about half to two-thirds of
7896-415: The time taken for rain to reach the river, while catchment size, soil type, and development determine the amount of water to reach the river. Generally, topography plays a big part in how fast runoff will reach a river. Rain that falls in steep mountainous areas will reach the primary river in the drainage basin faster than flat or lightly sloping areas (e.g., > 1% gradient). Shape will contribute to
7990-477: The time taken for runoff water within a drainage basin to reach a lake, reservoir or outlet, assuming constant and uniform effective rainfall. Drainage basins are the principal hydrologic unit considered in fluvial geomorphology . A drainage basin is the source for water and sediment that moves from higher elevation through the river system to lower elevations as they reshape the channel forms. Drainage basins are important in ecology . As water flows over
8084-548: The western part of Vancouver Island and the rest of the coast is covered by temperate rainforest . The province's most populous city is Vancouver, which is at the confluence of the Fraser River and Georgia Strait , in the mainland's southwest corner (an area often called the Lower Mainland ). By land area, Abbotsford is the largest city. Vanderhoof is near the geographic centre of the province. The Coast Mountains and
8178-413: The whole of the mainland rather than just its north-central Interior came to be called, continued to be an unorganized territory of British North America, "administered" by individual HBC trading post managers. Drainage basin A drainage basin is an area of land in which all flowing surface water converges to a single point, such as a river mouth , or flows into another body of water , such as
8272-692: The world's land drains to the Atlantic Ocean . In North America , surface water drains to the Atlantic via the Saint Lawrence River and Great Lakes basins, the Eastern Seaboard of the United States, the Canadian Maritimes , and most of Newfoundland and Labrador . Nearly all of South America east of the Andes also drains to the Atlantic, as does most of Western and Central Europe and
8366-618: Was administratively combined with the Wenatchee National Forest in 2000, although the boundaries for each forest remained unchanged, and in 2007, it administratively became known as the Okanogan–Wenatchee National Forest . The headquarters are in Wenatchee, Washington . There are local ranger district offices located in Chelan , Cle Elum , Entiat , Leavenworth , and Naches . The Forest Reserve Act of 1891 gave
8460-705: Was chosen by Queen Victoria , when the Colony of British Columbia (1858–1866) , i.e., "the Mainland", became a British colony in 1858. It refers to the Columbia District , the British name for the territory drained by the Columbia River , in southeastern British Columbia, which was the namesake of the pre- Oregon Treaty Columbia Department of the Hudson's Bay Company . Queen Victoria chose British Columbia to distinguish what
8554-610: Was later created from a portion of the Winthrop Ranger District, and the Conconully Ranger District became the Okanogan Ranger District. The western part of the Colville National Forest transferred into the Chelan National Forest in 1943. On March 23, 1955, Chelan National Forest again became the Okanogan National Forest, then headquartered in the city of Okanogan . As per the change, the rename of
8648-833: Was organized into the New Caledonia district, administered from Fort St. James. The interior south of the Thompson River watershed and north of the Columbia was organized into the Columbia District, administered from Fort Vancouver on the lower Columbia River. The northeast corner of the province east of the Rockies, known as the Peace River Block, was attached to the much larger Athabasca District , headquartered in Fort Chipewyan , in present-day Alberta. Until 1849, these districts were
8742-499: Was still existent, then only occupying the drainage basin of Lake Chelan and Entiat. The Conconully, Loomis, Squaw Creek, Sweat Creek, Twisp and Winthrop ranger districts were formed between 1911 and 1915. On July 1, 1921, the entire forest reunited back into the Chelan National Forest, and the term Okanogan was discontinued. Subsequently, another ranger district was established, the Chelan Ranger District. Portions of
8836-520: Was the British sector of the Columbia District from the United States' ("American Columbia" or "Southern Columbia"), which became the Oregon Territory on August 8, 1848, as a result of the treaty. Ultimately, the Columbia in the name British Columbia is derived from the name of the Columbia Rediviva , an American ship which lent its name to the Columbia River and later the wider region;
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