§2.3 Catchment area of the Rhine part 2

• Aardrijkskunde
• Middelbare school
• havo, vwo
• Leerjaar 2

§2.3 Catchment area of the Rhine part 2

Program

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

Where does erosion occur and where does sedimentation occur?

1. Erosion in the upper reaches, sedimentation in the lower reaches
2. Sedimentation in the upper reaches, erosion in the lower reaches
3. Sedimentation in the lower reaches, erosion in the middle reaches and sedimentation in the upper reaches
4. Erosion in the lower reaches, erosion in the middle reaches and sedimentation in the upper reaches

The end of the Rhine, where the river flows into the sea, is also called

1. Delta
2. The lower reaches
3. The middle reaches
4. Estuarium

This is where the water flows hardest

1. Middle reaches
2. Lower reaches
3. Upper reaches
4. In North-Korea

This is where most sedimentation takes place

1. Middle reaches
2. Lower reaches
3. Upper reaches
4. Sovjet-Union

What process predominates here in the photograph?

1. weathering
2. erosion
3. sedimentation
4. stupid question

What process predominates here in the photograph?

1. weathering
2. erosion
3. sedimentation
4. I'm smart

In the inside bend,..... place finds

1. Weathering
2. Erosion
3. Sedimentation
4. There is no bend

Discuss assignments

6 and 7

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

Notes

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.

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

Catchment area Rhine and Meuse

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)

Fall:

The difference in altitude between two points along a river

Gradient:

The fall per kilometre in m/km

Fall =
height difference=
2500-2000= 500 m

Gradient = fall per km

Height difference

----------------------

Distance

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

Let's go to work!

From §2.3, make assignments 2, 8 and 10