Stream Sampling and Measurement Techniques

The video tutorial provides a comprehensive guide on stream sampling and assessing stream health. It covers the equipment used, such as waders, life jackets, and the YSI Pro Plus multimeter, which measures water temperature, pH, dissolved oxygen, and conductivity. The tutorial explains the calibration process for the multimeter and demonstrates field sampling techniques at Laurel Creek. It also includes methods for measuring wetted width and stream gauging using the area velocity method. Finally, it emphasizes the importance of observing site features and understanding the impact of land use on sampling sites.

What is the primary purpose of using waders and life jackets during stream sampling?

• To ensure safety while in the water

• To keep the equipment dry

• To collect water samples

• To measure water temperature

Which of the following is NOT a parameter measured by the YSI Pro Plus multimeter?

• Stream width

• Water temperature

• pH level

• Dissolved oxygen

Before using the YSI Pro Plus multimeter in the field, what must be done to the dissolved oxygen probe?

• It must be immersed in distilled water

• It must be calibrated

• It must be replaced

• It must be dried completely

When collecting water samples, why is it important to rinse the bottle three times?

• To label the bottle correctly

• To ensure the bottle is clean

• To cool down the bottle

• To remove any air bubbles

What is the purpose of the black hollow sleeve used with the YSI multimeter probes?

• To measure water depth

• To increase probe sensitivity

• To protect the probes from damage

• To calibrate the probes

How is the wetted width of a stream measured?

• Using a thermometer

• Using a flow meter

• Using a meter stick

• Using a measuring tape

What method is demonstrated for measuring stream discharge?

• Pressure gradient method

• Area velocity method

• Volume displacement method

• Flow rate method

During stream gauging, what is measured at various increments across the stream?

• Dissolved oxygen

• Stream depth and velocity

• pH level

• Water temperature

What should be noted about the sampling site during observations?

• The air temperature

• The number of fish

• The color of the water

• The stability of the banks

Why is it important to observe upstream and downstream activities at the sampling site?

• To measure water flow

• To determine water clarity

• To identify potential impacts on the site

• To count the number of plants