Land Reclamation and Area Decline

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Questions and Answers

What was the approximate surface area of the area in question?

  • 500 Km2
  • 460 Km2
  • 600 Km2 (correct)
  • 400 Km2

What was the main purpose of land reclamation in the southern sector?

  • Construction of dams
  • Mining
  • Urban development
  • Agriculture (correct)

By what year had the surface area of the area declined to about 460 Km2?

  • 1974 (correct)
  • 1964
  • 1984
  • 1994

What was the percentage decline in the surface area of the area?

<p>23% (D)</p> Signup and view all the answers

What was the original surface area of the area before land reclamation?

<p>600 Km2 (B)</p> Signup and view all the answers

What is the primary reason for the increase in dissolved oxygen in Lake Borolus during late autumn and winter?

<p>Decrease in water temperature and increase in oxygen solubility (C)</p> Signup and view all the answers

What is the effect of wind action on Lake Borolus during late autumn and winter?

<p>It increases the water movement (C)</p> Signup and view all the answers

During which seasons does Lake Borolus experience an increase in dissolved oxygen?

<p>Late autumn and winter (A)</p> Signup and view all the answers

What happens to the oxygen solubility in water as the water temperature decreases?

<p>It increases (D)</p> Signup and view all the answers

What is the relationship between water movement and dissolved oxygen in Lake Borolus?

<p>Increased water movement increases dissolved oxygen (A)</p> Signup and view all the answers

What type of plants are found in the Burullus wetland?

<p>Phragmites sp (B)</p> Signup and view all the answers

What is one of the methods mentioned to increase agricultural productivity?

<p>Reclaiming land for agriculture (A)</p> Signup and view all the answers

What is the significance of the lake in Burullus wetland?

<p>It is an important stopover for waterfowl (B)</p> Signup and view all the answers

What is the primary characteristic of the Phragmites sp?

<p>It is a semi-aquatic plant (B)</p> Signup and view all the answers

What is a potential consequence of over fishing?

<p>Depletion of fish populations (D)</p> Signup and view all the answers

What is the function of hackers in fish farming?

<p>To expand fish farming (D)</p> Signup and view all the answers

What is the type of ecosystem found in the Burullus wetland?

<p>Wetland ecosystem (B)</p> Signup and view all the answers

What is the primary feature of the sand dunes in Burullus wetland?

<p>They are sandy formations (C)</p> Signup and view all the answers

What is a potential consequence of using high levels of blue green algae?

<p>Imbalance in ecosystem (D)</p> Signup and view all the answers

What is the relationship between fertilizers and pesticides in the context of agriculture?

<p>Fertilizers and pesticides are used together to increase agricultural productivity (D)</p> Signup and view all the answers

What is the significance of pH value in ecological systems?

<p>It reflects the pollution level of aquatic environments (A)</p> Signup and view all the answers

What does pH value reflect in aquatic environments?

<p>The level of pollution (D)</p> Signup and view all the answers

Why is pH value important in many life processes?

<p>It plays a crucial role in many life processes (A)</p> Signup and view all the answers

What can pH value indicate in aquatic environments?

<p>The pollution level of the environment (B)</p> Signup and view all the answers

What is the role of pH value in many life processes?

<p>It plays an important role (C)</p> Signup and view all the answers

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Study Notes

Lake Burullus Characteristics

  • Had a surface area of approximately 600 km², but declined to around 460 km² by 1974 due to land reclamation for agriculture in its southern sector.

Importance of Lake Burullus

  • Serves as an important wetland for waterfowl (water birds).

Threats to Lake Burullus

  • Reclamation of land for agriculture, leading to habitat destruction.
  • Overuse of fertilizers and pesticides.
  • High levels of blue-green algae.
  • Overfishing.
  • Expansion of fish farming (hackers).

Water Quality in Lake Burullus

  • Seasonal variations of dissolved oxygen levels were observed, with increases in late autumn and winter due to wind-driven water movement and decreasing water temperature.
  • pH value plays a crucial role in life processes and reflects the pollution level of aquatic environments.

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