§2.3 Catchment area of the Rhine part 2

§2.3 Catchment area of the Rhine part 2

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AardrijkskundeMiddelbare schoolhavo, vwoLeerjaar 2

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§2.3 Catchment area of the Rhine part 2

Slide 1 - Diapositive

Program
  • Retrospective
  • Learning Objectives
  • Explanation part 1
  • Getting started!
  • End

Slide 2 - Diapositive

Where does erosion occur and where does sedimentation occur?
A
Erosion in the upper reaches, sedimentation in the lower reaches
B
Sedimentation in the upper reaches, erosion in the lower reaches
C
Sedimentation in the lower reaches, erosion in the middle reaches and sedimentation in the upper reaches
D
Erosion in the lower reaches, erosion in the middle reaches and sedimentation in the upper reaches

Slide 3 - Quiz

The end of the Rhine, where the river flows into the sea, is also called
A
Delta
B
The lower reaches
C
The middle reaches
D
Estuarium

Slide 4 - Quiz

This is where the water flows hardest
A
Middle reaches
B
Lower reaches
C
Upper reaches
D
In North-Korea

Slide 5 - Quiz

This is where most sedimentation takes place
A
Middle reaches
B
Lower reaches
C
Upper reaches
D
Sovjet-Union

Slide 6 - Quiz

What process predominates here in the photograph?
A
weathering
B
erosion
C
sedimentation
D
stupid question

Slide 7 - Quiz

What process predominates here in the photograph?
A
weathering
B
erosion
C
sedimentation
D
I'm smart

Slide 8 - Quiz

In the inside bend,..... place finds
A
Weathering
B
Erosion
C
Sedimentation
D
There is no bend

Slide 9 - Quiz

Discuss assignments
6 and 7

Slide 10 - Diapositive

Goals
After this lesson:
... you will know the difference between fall and gradient
... you can explain in your own words what the flow rate and regime of a river are

Slide 11 - Diapositive

Notes

Slide 12 - Diapositive

Slide 13 - Diapositive

Floodings
People like to live close to the river. They built streets and buildings. More impervious surface.
Impervious surface = Paved areas and infrastructure that prevent water from infiltrating into the ground.

This reduced infiltration (=intrusion of water into soil) and therefore the river fills up quickly.

Slide 14 - Diapositive

Floods
When it rains hard, normally plants and trees can catch the water, but due to the increase of impervious surfaces, water can not infiltrate and flows to the river

So there is a greater chance of flooding

Slide 15 - Diapositive

Slide 16 - Vidéo

Catchment area Rhine and Meuse

Slide 17 - Diapositive

Flow in river
Regime: The fluctuations in a river’s flow rate

Flow rate: the amount of water flowing at a particular point in the river (m3/s)


Slide 18 - Diapositive



Fall:
The difference in altitude between two points along a river





Gradient:
The fall per kilometre in m/km

Slide 19 - Diapositive

Fall =
height difference=
2500-2000= 500 m
Gradient = fall per km
Height difference
----------------------
Distance

Slide 20 - Diapositive

Calculate the fall and gradient
Location 1: Spijk =12m
Location 2: Hoek van Holland= 0m
Distance between 1 and 2 = 150 km

Fall=...................
Gradient=......................... : ............... = .....m/km

Slide 21 - Diapositive

Let's go to work!
From §2.3, make assignments 2, 8 and 10

Slide 22 - Diapositive