Chapter 16: Rivers

__________ make up the suspended loads of most rivers and streams. A) Dissolved ions and sand B) Dissolved salts C) Silt and clay-sized, detrital grains D) Sand and gravel that move during floods

__________ describes the total sediment load transported by a stream. A) Capacity B) Discharge C) Competence D) Hydro-load factor

__________ is an abandoned, cutoff, meander loop. A) A builtrail B) An oxbow C) A cowhock D) A gatorback

__________ are characteristics of downcutting streams and a youthful stage of valley evolution. A) Rapids and lots of whitewater B) Wide floodplains C) A U-shaped, cross-valley profiles D) Meandering channels and natural levees

The __________ river has the largest discharge of any in the world. A) Nile B) Mississippi C) Congo D) Amazon

__________ generally constitutes the highest percentage of the annual sediment load moved by a stream. A) Bed load B) Dissolved load C) Suspended load D) Saltation load

Where is erosion concentrated along a meandering stream? A) on the straight channel segments that connect the meander loops B) on the outer parts of the meander loops or bends C) at the unconsolidated point bars D) on the inner banks of the meander loops

Which one of the following would cause stream rejuvenation? A) sea level rises B) a shift from downcutting to lateral cutting C) the land is uplifted D) when unstable distributaries in a delta are abandoned

Which one of the following statements is true concerning natural levees? A) Depositional features formed at times of low discharge. B) Mostly fine sand and silt that build up during floods. C) Erosional features left behind when meander cutoff occurs. D) Form the high, steep banks of a downcutting stream.

A dam and reservoir are constructed on a graded river. What will happen? A) Deposition upstream from the dam; channel downcutting below. B) Channel downcutting upstream from the dam; deposition below. C) Deposition upstream and downstream from the dam. D) Channel downcutting upstream and downstream from the dam.