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Watersheds

Watersheds: Investigation 1 - Water Velocity and Discharge

In Investigation One, you will explore the abiotic factors of water velocity and discharge that affect watersheds. During this Investigation, you will:

  1. Create a model of the headwaters of a watershed.
  2. Test the effect of water flowing at a slow, medium, and high velocity on discharge.
  3. Calculate discharge using the following formula:

Discharge = Volume(ml) / Time(s)

Watersheds: Investigation 2 - Sedimentation and Turbidity

In Investigation Two, you will further investigate watersheds and sedimentation. During this Investigation, you will:

  1. Create a model of a watershed and test the amount of sedimentation and turbidity at various water velocities.
  2. Use a spectrophotometer to measure the transmittance of light in water samples of varying water velocity and turbidity.

Watersheds: Investigation 3 - Abiotic Factors and Dissolved Oxygen

In Investigation Three, you will consider abiotic factors such as temperature, water velocity, and salinity in a watershed and how they affect dissolved oxygen levels. During this Investigation, you will:

  1. Use an Oxygen Meter to measure the dissolved oxygen levels in water samples of varying temperatures.
  2. Use an Oxygen Meter to measure the dissolved oxygen levels in water samples of varying salinity (salt concentrations).
  3. Use an Oxygen Meter to measure the dissolved oxygen levels in water samples of varying water velocities.
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Watersheds: Investigation 4 - Performance Assessment

This Performance Assessment is designed to allow you to solve a problem using the:

  • concepts with which you have become familiar during the previous three Investigations, and
  • procedures used during the previous three Investigations.

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