Exam 17: Streams and Floods: the Geology of Running Water

Along a uniform and steep slope of relatively weak substrate,a ________ drainage network is expected.

In some cases,the push of flowing water can break chunks of solid rock off of the channel bed.These pieces are then carried along by a stream as _________

Runoff from farm fields entering a stream system is likely to be __________ than that from naturally vegetated fields.

Along a large cone-shaped volcano,a ________ drainage network is expected.

The flat-lying area surrounding a river channel is termed the ________.

All else being equal,water will flow faster in a stream with ________ and a ________ wetted perimeter.

What is a flash flood? Suggest two circumstances that might lead to flash flooding.

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

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

Pirate streams ________.

A meander that is cut off to become completely isolated from the main channel but which retains water is a(n)________.

In a region characterized by a parallel series of ridges and valleys,a ________ drainage network is expected.

The figure below shows an example of a ________ drainage network.

Geologists are trying to determine the discharge of a river.The stream is semicircular in shape with a width of 10 m.They measure the velocity of the river to be 0.2 m/s.What is the discharge of the river? Sketch this cross section,and show your work.

The figure below shows an example of a ________ drainage network.

The figure below shows two hypothetical streams that have identical cross-sectional areas but different channel shapes.Assuming all other factors are equal,stream ________ will have the fastest flow because of the difference in ________.

Running water dissolves soluble minerals.This material is most likely to be transported by a stream as _________.

Ultimately,the base level of a stream valley cannot be lower than ________.

Which river has the greatest discharge of any stream on the Earth?

The inner edge of a meander,where sediment is deposited,is a(n)________.