Sediment Sampling Techniques and Procedures

This video tutorial demonstrates how to perform sediment sampling for river monitoring. It explains that sediment is chosen as a habitat when other diverse habitats are absent. The video describes sediment habitats, including sandy, silty, or muddy bottoms, and small algae-covered rocks. The tutorial introduces the riffle dance technique for sampling, where participants shuffle their feet upstream of a net for three minutes. The video also covers collecting and filtering sediment using a net, inspecting the net for invertebrates, and cleaning the net with a wash bottle.

What is the primary purpose of sediment sampling in river monitoring?

• To calculate water flow speed

• To measure water temperature

• To assess macroinvertebrate diversity

• To determine the pH level of the water

Which type of habitat is chosen when no diverse habitats are present in a stream?

• Vegetative habitat

• Rocky habitat

• Open water habitat

• Sediment habitat

What materials typically make up a sediment habitat?

• Large boulders

• Sandy, silty, or muddy bottoms

• Dense aquatic plants

• Gravel and pebbles

How long should you perform the riffle dance to sample sediment?

• 5 minutes

• 1 minute

• 2 minutes

• 3 minutes

What is the purpose of the riffle dance in sediment sampling?

• To measure water depth

• To clean the net

• To disturb the sediment

• To attract fish

What should be done after disturbing the sediment for 3 minutes?

• Leave the net in place

• Stop the sampling process

• Scoop the net forward and up

• Move to a different location

What is the next step after scooping the net forward and up?

• Inspect the net for damage

• Dip the bottom into the stream

• Store the net away

• Dry the net thoroughly

What should be done to the net after dumping the sediment into the bucket?

• Leave the net as it is

• Turn the net inside out and shake it

• Store the net in a dry place

• Dry the net with a towel

How can you ensure all invertebrates are removed from the net?

• Inspect the net for movement

• Shake the net vigorously

• Leave the net in the sun

• Use a magnifying glass

What is the final step in the sediment sampling process?

• Dry the net with a cloth

• Turn the net right side in

• Store the net in a container

• Leave the net in the stream