Exam 12: Running Water Streams and Rivers

The two types of flow are ____________________ flow and ____________________ flow.

Distinguish sheet flow from channel flow.

Former meanders that have been cut off from the stream are called ____________________.

Briefly explain how a stream can apparently have a bed that extends onto the continental shelf or to the shelf-slope break.

Why does the velocity of a stream generally increase downstream even though the gradient decreases?

Describe the hydrologic cycle.

On what factors does the infiltration capacity of a surface depend?

When a stream's equilibrium profile shows a delicate balance among gradient,discharge,flow velocity,channel shape and sediment load the stream is

The percentage of Earth's water that is in the oceans is ____.

The types of marine deltas that are recognized,based on the relative importance of the processes involved in their formation are ____________________-dominated,____________________-dominated,and ____________________-dominated.

Is it possible to change the velocity of a stream but have it maintain the same discharge? Explain.

In the hydrologic cycle,what happens to the precipitation that falls on the land?

A stream's velocity varies only along its length.

Streams with broad,shallow channels and narrow,deep channels have a higher flow velocity than do those with semi-circular channels.

What evidence is there that reveals that water may once have been abundant on Mars?

A delta that has islands reworked by waves on the seaward side,such as the Nile delta,is typically formed as a(n)____-dominated delta.

Ridges of alluvium left along a stream's margins by repeated deposition during floods are called ____________________.

Alluvial fans form best in humid climates.

Briefly explain what property of water makes hydrologic cycling possible.

The outer bank of a meander in a meandering stream is called the ____________________ ____________________,where (erosion,deposition)____________________ takes place.The deposit on the opposite side of the channel is called the ____________________,which is where (erosion,deposition)____________________ occurs.