True or False? 1. Bed material load includes washload 2. Bed material load may t

ID: 1712751 • Letter: T

Question

True or False?

1. Bed material load includes washload

2. Bed material load may transported as bedload and suspended load

3. The unmeasured load in large rivers is associated with a zone of relatively low sediment concentration

4. Some streams may be either capacity limited or supply limited depending on flow conditions

5. Unmeasured load typically refers to suspended load that passes over the Helley-Smith sampler.

6. Measured migration rates tend to be greatest when the radius of curvature to width ratio is between 3 and 5.

7. The bankfull discharge moves the most sediment over time and has recurrence interval of 1.5 years in the annual maximum series

8. Effective discharge is determined using field indicators such as vegetation

9. A terrace is an abandoned floodplain.

10. The d10 is commonly assumed to be the threshold value for particle sizes in the washload

False. Bedload and wash load are two separate components of sediment.

True.Sometimes, the bed material load may be transported as bedload and suspended weight for small distances.

True.The unmeasured load in large rivers is associated with a zone of relatively low sediment concentration which is dynamic.

True.The bank full discharge moves the most sediment over time and has the recurrence interval of 1.5 years in the annual maximum series.

True.Effective discharge is determined using field indicators such as vegetation.

True. An abandoned floodplain changes to a terrace over time.

True.The d10 is commonly assumed to be the threshold value for particle sizes in the washload

True.Measured migration rates tend to be greatest when the radius of curvature to width ratio is between 3 and 5

True.Some streams may be either capacity limited or supply limited depending on flow conditions in the upstream.

False. The Helley-Smith (HS) sampler can be used to measure the bedload transport.

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