Watersheds

watershed

catchment or drainage basin

land ear which drains surface water to a point along a river or to a lake

usually approx using topography

terminology is based facing downstream

watershed topography

usually determined by topography, so for example mountains or change in slope will provide a specific area which water would flow to

but not always the case

problems with watershed topography

different factors such as infiltration, springs, permeable layers, etc can change the watershed boundaries

also regional, intermediate and local flow can vary and therefore change things as well

mississippi

what is watershed 1

colorado and river grande

what is 2 and 3

orinoco, amazon, and parana-paraguay-rio plata

what is 4, 5, 6

niger, chad, nile

what is 7, 8, 9?

congo, zambezi, orange

what is 10, 11, 12?

danube, dniepr, volga

what is 13, 14, 15?

ob-irtysh, yenisei, lena

what is 16, 17, 18?

amur, euphrates-tigris, aral

what is 19, 20, 21?

indus, ganges, brahmaputra

what is 22, 23, 24?

mekong, yangtze, yellow, murray-darling

what is 25, 26, 27, 28?

columbia, fraser, and skeena

what is a, b, c?

yukon, mackenize, liard

what is d, e, f?

peace, athabasca, churchill

what is g, h, i

nelson, saskatchewan, red

what is j, k, l?

albany, moose, nottaway

what is m, n, o?

la grande riviere, koksoak, another churchill

what is p, q, r?

saquenay, st lawrence, ottawa

what is s, t, u?

watersheds of ab

hay river, peace/slave, athabasca flow to arctic via mackenzie river

beaver river, n sask, s sask flow to hudson bay via nelson/churchill

milk river flows to gulf of mexico via mississippi

indigenous names

many currently used like saskatchewan, nahanni and athabasca

should these be changed to indigenous names?