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Rivers, climate and Rivers, climate and vegetationvegetation
5th gradeBY PATRICIA VELASCO RICO
What is a river?What is a river?Rivers are moving bodies of
water.
River Thames
Where does a river Where does a river originate?originate?A river originates in the
mountains, and flows into a sea, a lake or another river.
The river originates in the
mountains The river flows into a sea, a
lake or another river
For example…
A river that flows into an ocean: River Tajo
For example
A river that flows into another river:
Guadarrama river flows into Tajo River.
For example
A river that flows into a lake:River Ter (Gerona) flows into Lago
de Bañolas
Elements of a riverElements of a river
- The courseWe canDistinguish 3 - The flowelements in a river - The flow regime
What is the course of a What is the course of a river?river?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
There are 3 courses:
Upper courseUpper courseIt is near the source. Here, the river is narrow.The river bed is steep, so the
water moves fast
Middle courseMiddle courseHere, the river is wider. The river
bed is flatter, so the water flows slowly.
In the middle course, the river forms curves. These curves are called meanderings.
This is a meandering
Lower courseLower courseIt is near the mouth of the river.The river is wide here. The river
bed is very flat, so the water moves very slowly.
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
What is flow regime?What is flow regime?It is the flow pattern during the
year.
◦If the flow regime varies very little, it is regular.
◦If the flow regime varies a lot, it it irregular
Torrents, lakes and Torrents, lakes and reservoirsreservoirsWater can also be found in other
places on the surface of the Earth.
◦Torrents
◦Lakes
◦Reservoirs
TorrentTorrentThey are streams of water which
form after heavy rains
LakesLakesThey are large bodies of water
surrounded by land.
ReservoirsReservoirsThey 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
What is a watershed?What is a watershed?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
Meter imagen de vertientes hidrográficas
Cantabrian WatershedCantabrian WatershedIt has short, swift rivers.
They have a regular flow regime and abundant flow.
The most important rivers are the Nervion, Saja, Navia and Nalón
Mediterranean watershedMediterranean watershedIt 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
Ebro River
It is the most plentiful river of mediterranean watershed
Atlantic watershedAtlantic watershedIt occupies more than half 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
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