This document discusses the key elements and features of rivers. It describes how rivers originate in mountains and flow into seas, lakes or other rivers. It distinguishes three main parts of a river's course: the upper, middle and lower courses. The upper course is near the source and the water moves swiftly, while the lower course near the mouth is wide and the water moves slowly. The document also discusses the flow of a river, which is the amount of water it carries, and how this depends on precipitation. Rivers are also categorized into different watersheds depending on whether they flow into the Cantabrian Sea, Mediterranean Sea or Atlantic Ocean.

2.  Rivers are moving bodies of water.
River Thames

3.  A river originates in the mountains, and flows
into a sea, a lake or another river.

4. The river
originates in the
mountains The river flows into
a sea, a lake or
another river

5.  For example…
A river that flows into an ocean: River Tajo

6.  For example
A river that flows into another river:
Guadarrama river flows into Tajo River.

7.  For example
A river that flows into a lake:
River Ter (Gerona) flows into Lago de
Bañolas

8. - The course
 We can
Distinguish 3 - The flow
elements in
a river - The flow regime

9.  The course of a river is the route which a river
takes from its source to the mouth.
This is
the
source of
the river
This is
the
mouth of
the river
This is the
COURSE of
the river

10.  There are
3 courses:
Upper course
Middle course
Lower course

11.  It is near the source.
Here, the river is narrow.
The river bed is steep, so the water moves fast.

12.  Here, the river is wider. The river bed is flatter,
so the water flows slowly.

13.  In the middle course, the river forms
curves. These curves are called
meanderings.
This is a
meandering

14.  It is near the mouth of the river.
The river is wide here. The river bed is very flat,
so the water moves very slowly.

15. What is the flow of a river?
 It is the amount of water that a river
carries.
The more precipitacion there is, the greater the
flow will be.

16.  Water can also be found in other places on the
surface of the Earth.
 Torrents
 Lakes
 Reservoirs

17.  They are streams of water which form after
heavy rains

18.  They are large bodies of water surrounded by
land.

19.  They are man – made lakes.
They produce energy, irrigate fields and supply
water to urban areas. Canals and irrigation
chanels are used for transporting water from a
reservoir to other places.

20. Reservoir in Hillsborough
County
Reservoir in Hillsborough
County

21.  Rivers that flow into the same sea belong to the
same watershed (vertiente).
 The rivers in Spain flow into three different
seas, in other words, they belong to three
watersheds:
 Cantabrian watershed
 Mediterranean watershed
 Atlantic watershed

22.  Meter imagen de vertientes hidrográficas

23.  It has short, swift rivers.
 They have a regular flow regime and abundant
flow.
 The most important rivers are the Nervion,
Saja, Navia and Nalón

24.  It occupies about one third of Spain.
 With the exception of the Ebro, the rivers are
short and have irregular regimes.
 During rainy seasons, they may overflow.
In the summer, they may dry up.
 The most important rivers are the Ebro, the
Júcar, the Segura and de Llobregat

25. Ebro River
It is the most
plentiful river of
Mediterranean
basin.

26.  It occupies more than half the area of Spain.
 The rivers have abundant flows and regular
flows regimes.
 In the summer they carry less water.
 The most important rivers are the Miño, the
Duero, the Tagus, the Guadiana and the
Guadalquivir