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A hydrological code or hydrologic unit code is a sequence of numbers or letters (a geocode) that identify a hydrological unit or feature, such as a river, river reach, lake, or area like a drainage basin (also called watershed in North America) or catchment.
Watershed delineation is the process of identifying the boundary of a watershed, also referred to as a catchment, drainage basin, or river basin.It is an important step in many areas of environmental science, engineering, and management, for example to study flooding, aquatic habitat, or water pollution.
The 10-digit watersheds were delineated to be between 40,000 and 250,000 acres in size, and the 12-digit subwatersheds between 10,000 and 40,000 acres. [5] In addition to the hydrologic unit codes, each hydrologic unit was assigned a name corresponding to the unit's principal hydrologic feature or to a cultural or political feature within the ...
Geography of Europe; Several of the oldest cities of Northwestern Europe are highlighted in this astronaut's photograph from 00:25 GMT on 10 August 2011: Area: 10,180,000 km 2 (3,930,000 sq mi) (6th) Population: 742,452,000 (2013; 3rd) Population density: 72.9/km 2 (188/sq mi) (2nd) Demonym: European: Countries: 50 sovereign states 5 with ...
Clickable map of Europe, showing the standard convention for its continental boundary with Asia. (see boundary between Asia and Europe for more information). Legend: blue = Contiguous transcontinental states; green = Sometimes considered European but geographically outside Europe's boundaries.
Corrected Switzerland (to Central Europe) and Andorra (to Southwestern Europe) according to CIA source: 19:47, 17 December 2009: 680 × 520 (574 KB) Kolja21: rev Please make new map, if you don't like this one: 22:22, 16 December 2009: 680 × 520 (575 KB) Koyos: colors were incorrect according to source, now fixed, see discussion: 18:42, 27 May ...
Reverted to version as of 12:17, 22 February 2021 (UTC) No reason to color countries that are outside Europe in the Geosceme unless they are geographically transcontinental 00:12, 6 August 2021 680 × 520 (262 KB)
Below is a list of European countries and dependencies by area in Europe. [1] As a continent, Europe's total geographical area is about 10 million square kilometres. [2] Transcontinental countries are ranked according to the size of their European part only, excluding Greece due to the not clearly defined boundaries of its islands between ...