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

What is a stream? How is it similar/different from a river or a creek?

When one stream captures the flow from another stream it is called ________.

Dead zones are areas along the coasts where rivers spill excess nutrients into the oceans.Microorganisms feed on these nutrients,which in turn causes them to use up all the ________ in the water and kill larger organisms like fish.

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

________ release extra sediment to rivers,while ________ cause(s)a decrease in the sediment supply downriver.

The figure below is an aerial photograph of a meandering stream.The light-colored features labeled with arrows are ________.

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

You are a geologist trying to determine the discharge of a River.The stream is semi-circular in shape with a width of 10 meters.You measure the velocity of the river to be 0.2 m/s.What is the discharge of the river? Make sure to show your work for full credit.

________ provide hydroelectric power;however,they also form barriers for migrating fish.

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

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

Name and describe two methods to mitigate flood hazards.

Using the following graph,predict the discharge for a 100-year flood.

If a dam is built on a river,what effects might be felt downstream?

Meandering streams ________.

Why do meandering rivers meander (move)across their floodplain?

Braided streams ________.

A small mountain stream will have a ________ competence and a ________ capacity than the Mississippi River.

Which of the following is true of ephemeral streams but NOT permanent streams?

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