Exam 14: Streams and Floods: the Geology of Running Water

Which sediment load is likely to move the least,in between periods of flood?

The construction of dams on major rivers often has both positive and negative effects.Which of the following would not be a negative effect of damming rivers?

The deltas of all major rivers consist of multiple radiating lobes of sediment in a "bird's foot" configuration,similar to the Mississippi River Delta.

The deepest part of a mature river channel is where the water usually flows the fastest.

Which has greater capacity?

Which three geologic terms are used to describe the course of an ephemeral stream?

Pirate streams ____________.

In uniform sediments with a relatively constant slope at the surface,a ____________ drainage network is expected.

The sediment load of a stream consists of only those grains that are fine enough to stay in suspension.

The lowest elevation to which a stream can downcut is the ____________.

In a region with prominent orthogonal sets of joints,a ____________ drainage network is expected.

Meandering streams ____________.

The base level of a tributary would become ____________ if a dam and reservoir were constructed where it flowed into a trunk stream.

How would the competency of an arid versus a temperate-region stream vary,in a downstream direction?

The outer edge of a meander,where material is being eroded,is a(n)____________.

The slope of a stream surface measured between two points along its course is the ____________.

At a delta,____________.

V-shaped stream valleys result from the downcutting of stream erosion and ____________.

All else being equal,water will flow faster in a stream that has a ____________.

As the velocity of flow decreases,____________.