Site pages
Current course
Participants
General
18 February - 24 February
25 February - 3 March
4 March - 10 March
11 March - 17 March
18 March - 24 March
25 March - 31 March
1 April - 7 April
8 April - 14 April
15 April - 21 April
22 April - 28 April
3.1.1 Introduction
Rivers are linear systems which show a gradient of characters along their length. Ideally the longitudinal profile of a river is concave with a steep upper portion near the source, giving way to reaches of progressively less gradient as the mouth is approached. The steep and torrential upper course is called “rhithron” and the flat, slow-flowing lower course is called “potamon”. |
Last modified: Sunday, 27 November 2011, 8:04 PM