It results when headward erosion causes one stream to intersect the course of another stream. It leaves behind a dry channel called a water gap. It reverses the direction of flow in the captured stream. All of the possible answers are correct. It results when headward erosion causes one stream to intersect the course of another stream.
illustrates that a stream's gradient is steeper near its headwaters than near its mouth. shows that most streams flow down low slopes near their headwaters, and flow down steep valleys near their mouths. illustrates that a stream's gradient is steeper near its headwaters than near its mouth.
If the stream flow were reversed, the locations of point bars and cut banks would remain the same. If erosion at X and Y were to cut off the meander between them, an oxbow lake would be created.
C. Stream flow is fastest in the center of the channel near the surface. D. Water from trunk streams flows into tributaries. Stream flow is fastest in the center of the channel near the surface https://sw5.wwnorton.com/problemsets/filemanager/userfiles/[email protected]/17.9b.jpg
Once a stream has begun to cut back, the erosion is sped up by the steep gradient the water is flowing down. As water erodes a path from its headwaters to its mouth at a standing body of water, it tries to cut an ever-shallower path. This leads to increased erosion at the steepest parts, which is headward erosion.
Headward erosion occurs when the source of a stream channel is lengthened by erosion of the rock and soil in its basin. This type of erosion occurs in the opposite direction of the flow of the stream.
stream discharge. the volume of water passing a given point over a set time.
A shallow stream is less turbulent than a deep stream.
It reverses the direction of flow in the captured stream. All of the possible answers are correct. It results when headward erosion causes one stream to intersect the course of another stream.
An antecedent stream exists before crustal uplift in the areas and erodes downward at a rate equal to the rate of uplift. a superposed stream erodes its channel into a structure that already exists.
Discharge is the volume of water moving down a stream or river per unit of time, commonly expressed in cubic feet per second or gallons per day.
Definition of stream. Body of water, large or small that flows over the land surface.
Why does the velocity of a stream generally increase downstream even though the gradient decreases? Velocity generally increases downstream because channels are generally smoother downstream and because stream volume tends to increase as more tributaries enter downstream.
What happens to the erosive power of a stream as velocity increases? Erosion decreases.
Rectangular drainage patterns develop where linear zones of weakness, such as joints or faults cause the streams to cut down along the weak areas in the rock. Trellis drainage patterns develop where registrant rocks break up the landscape (see figure 17.4 in your textbook).
1. STREAM EROSION. Erosion is an ongoing process on all bodies of water, especially moving water. Both natural and human- caused factors affect the amount of erosion a stream may experience. Natural factors include the gradient (or steepness) of the streambed since that affects the speed of the flow of water.
If a dam is constructed properly, it will not change the ecosystem of the area it's in. D. Use of the waters of major rivers, like the Colorado River, has not affected their size or discharge. Early civilizations of Egypt, India, and China were established in river valleys and on flood plains. ...
D. He stated that the presence of erratics in Europe was due to large continental ice sheets. He stated that the presence of erratics in Europe was due to large continental ice sheets.
Two 100-year floods cannot occur in the same year (or in consecutive years). D. The size of a flood and its recurrence interval are inversely related; the larger the flood, the shorter its recurrence interval. A 200-year flood has a recurrence interval of, on the average, once every 200 years.
A meandering stream has many active channels flowing at once. A meander bend that gets cut off from the main channel becomes an oxbow lake. A stream with a single channel is called a braided stream. All of the possible answers are correct. A meander bend that gets cut off from the main channel becomes an oxbow lake.
The process by which icebergs break off of coastal glaciers is called surging. Narrow, steep-sided, deep inlets of seawater in glacial valleys are called fjords. Today, glaciers cover 30% of the land; in the ice age, they covered 70%. Pluvial lakes are lakes that form on the surface of a glacier.
Glaciers rework U-shaped stream valleys and change them into V-shaped valleys. Glaciers can erode a bedrock substrate by plucking. A firn is a pyramid-like peak that results when several cirques eat away at a mountain peak. Tarn is rocky material that has been carried along and deposited by the ice of a glacier.
erratic till, a mix of fine-grained sediment and sand. marine deposits, dropped by icebergs where a glacier flows into the sea. loess, seasonal deposits in glacial lakebed sediments. marine deposits, dropped by icebergs where a glacier flows into the sea.
Identify the true statement. Glaciers can undergo ablation by melting, sublimation, or calving. The zone of ablation is the area of the glacier where each year more snow falls than melts.