EQ1 drainage systems, aswan dam + deforestation

Question 1

Where is the largest drainage basin? How much water enters oceans from here?

Answer 1

The amazon drainage basin- covers 7 countries and 1/5 of all water entering oceans is from amazon.

Question 2

Where is the smallest drainage basin?

Answer 2

In the tamborasi river in indonesia. Length of 20m

Question 3

Where is the aswan dam and why was it built?

Answer 3

On river nile. In the south of Egypt, dam was built to manage flood risk and create a big source of water to use.

Question 4

What are the negatives of the Aswan dam?

Answer 4

-Flooding was largely controlled further downstream, but this has had a negative impact on farming.
-Lake Nasser has evaporative losses of 10-16 billion cubic meters a year.

Question 5

How many trees have been deforested in the Amazon?

Answer 5

18%

Question 6

What is the impact of deforestation on the Amazon?

Answer 6

-If there is less tree coverage, there will be less transpiration so won’t be enough rainfall.
-If there is more drought, there will be less crop yield.

Question 7

What is driving deforestation in the amazon basin?

Answer 7

Cattle ranching- accounts for 80% of current deforestation rates
Soybean cultivation- second largest producer of soybeans in the world