![](/9/995/thumbs/1566945841-1-10.jpg)
A river is a natural water stream (watercourse) of considerable size with a natural course along a channel (a natural depression developed by it) from its source down to its mouth and fed by surface and underground runoff from its basin.
Rivers are an integral part of the hydrological cycle. The water in a river is generally collected from surface runoff resulting from precipitation from a certain area bounded by a watershed (river basin), as well as from other sources, such as groundwater reserves, moisture stored in natural ice (during the melting of glaciers ) and snow cover.
In places of natural or artificial obstacles to the flow of the river, reservoirs appear (flowing lakes or artificial seas). Limnology (Greek λίμνε - lake, λόγος - teaching) or lake science is a branch of hydrology, the science of the physical, chemical and biological aspects of lakes and other fresh water bodies, including reservoirs. In turn, rivers are the subject of one of the largest sections of land hydrology - river hydrology or potamology (from other Greek ποταμός - river, λόγος - teaching - literally the science of rivers), which studies the structure of river networks, river flow, morphometry of river pools and so on. As a rule, rivers make their way and flow through zones of least stress and resistance - along tectonic faults.
Since ancient times, the energy of fast rivers and waterfalls has been widely used in human economic activity as a source of renewable energy for the operation of water mills and hydroelectric turbines.
Beautiful wallpapers and photos in high resolution for you.
![](/9/995/thumbs/1566945842-1-2.jpg)
![](/9/995/thumbs/1566945843-1-3.jpg)
![](/9/995/thumbs/1566945844-1-4.jpg)
![](/9/995/thumbs/1566945844-1-5.jpg)
![](/9/995/thumbs/1566945844-1-6.jpg)
![](/9/995/thumbs/1566945845-1-7.jpg)
![](/9/995/thumbs/1566945845-1-8.jpg)
![](/9/995/thumbs/1566945846-1-9.jpg)
![](/9/995/thumbs/1566945847-1.jpg)
![](/9/995/thumbs/1566945847-10-10.jpg)
![](/9/995/thumbs/1566945849-10-2.jpg)
![](/9/995/thumbs/1566945849-10-3.jpg)
![](/9/995/thumbs/1566945850-10-4.jpg)
![](/9/995/thumbs/1566945850-10-5.jpg)
![](/9/995/thumbs/1566945851-10-6.jpg)
![](/9/995/thumbs/1566945852-10-7.jpg)
![](/9/995/thumbs/1566945852-10-8.jpg)
![](/9/995/thumbs/1566945853-10-9.jpg)
![](/9/995/thumbs/1566945855-10.jpg)
![](/9/995/thumbs/1566945856-100.jpg)
![](/9/995/thumbs/1566945856-101.jpg)
![](/9/995/thumbs/1566945857-102.jpg)
![](/9/995/thumbs/1566945858-103.jpg)
![](/9/995/thumbs/1566945858-104.jpg)
![](/9/995/thumbs/1566945860-105.jpg)
![](/9/995/thumbs/1566945861-106.jpg)
![](/9/995/thumbs/1566945863-107.jpg)
![](/9/995/thumbs/1566945864-108.jpg)
![](/9/995/thumbs/1566945864-109.jpg)
Понравилось? Жми сердечко, оцени нашу работу
Comments
Popular
![img](/uploads/mini/custom4/1d3/3c762d635e8ecfc0f0030059fc67d.jpg)
Funny cute animals (24 wallpapers)
5 June 2024
![img](/uploads/mini/custom4/e6d/8ef2c311ae30765019496931e54c7.jpg)
Satisfying art HD wallpaper (24
1 June 2024
![img](/uploads/mini/custom4/af6/fdbd814dfc9a754ced48e46baf5a8.jpg)
Rihanna (46 wallpapers)
6 June 2024
![img](/uploads/mini/custom4/5a7/2aa0b59bdae814bce7019c53f2f9f.jpg)
Star Wars Game (58 wallpapers)
20 June 2024
![img](/uploads/mini/custom4/e32/d1febeda21985368ddc131b2b711a.jpg)
Little Mermaid (30 wallpapers)
31 May 2024
![img](/uploads/mini/custom4/34c/18129b5b17b23f96a0d90ea2f0074.jpg)
Shadow of Mordor game (49 wallpapers)
31 May 2024
![img](/uploads/mini/custom4/ace/145075d1c4ed169d84cf999989524.jpg)
Heath Ledger (61 wallpapers)
1 June 2024
![img](/uploads/mini/custom4/b80/38e661f73534d88790528b14c4548.jpg)
Santa Barbara (47 wallpapers)
2 June 2024
![img](/uploads/mini/custom4/229/f065537e06f980407e624bdc9a942.jpg)
Romantic love. Part 2 (37 wallpapers)
2 June 2024
![img](/uploads/mini/custom4/2df/0afdc6329c3850c9a635a88e54273.jpg)
Arsenal logo. Football team (34
2 June 2024
Archive
Random
![img](/uploads/mini/custom4/2eb/289b3ae7e45d33987554619cffb1c.jpg)
ultraviolet space. Ultraviolet cosmos
26 March 2020
![img](/uploads/mini/custom4/497/6a875e63d4964b4afd0336e66ac60.jpg)
Spiders 3 (45 wallpapers)
7 November 2013
![img](/uploads/mini/custom4/8ed/e57e335518edac2fca387bf9d1ea6.jpg)
Jellyfish (76 wallpapers)
19 November 2013
![img](/uploads/mini/custom4/a7b/15e4bd4c24896752ed01fd616dfbe.jpg)
St. Valentine's Day. St. Valentine's
17 October 2019
![img](/uploads/mini/custom4/1af/22ff964afc10fff1f57b373cc47f2.jpg)
Panthers and Jaguars (51 wallpapers)
4 March 2014