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Chapter 14

Fill in the Blank

Fill in the Blank

This activity contains 10 questions.

This aerial photograph shows a __________ stream channel. [photo source]

meanderingbraidedgradientundercutstraight

This aerial photograph shows a similar pattern, but with a significant difference. Normally, you would expect to find this type of stream in areas with very gentle gradients, probably near base level, in a humid region. However, this photograph shows part of Canyonlands National Park [Utah], located on the arid Colorado Plateau. The stream actually occupies a deep canyon that formed as the stream incised into the plateau in response to tectonic uplift. As such, this is a prime example of a river with __________. [photo source]

entrenched meandersnickpointsalluvial terracespoint bars and oxbow lakesundercut banks

This shaded relief map shows an area in the Appalachian Mountains in Pennsylvania. The type of drainage pattern that generally characterizes this region is __________. [image source]

trellisradialdendriticannularderanged

This photograph shows part of the Kalahari Desert [Africa]. The drainage pattern is evident as a series of dark and light stripes that follow patterns of fossil sand dunes from an ancient desert. Parallel channels intersect a larger stream following a fault on the left side of the image. Together, these geologic controls create a __________ drainage pattern.

dendriticrectangularannularderangedradial

This karst region in Slovenia represents which type of drainage pattern?

rectangularradialtrellisderangedannulardendritic

As you have learned, the Himalaya Mountains are continuously uplifted by tectonic activity, and weathering continually works to wear them down. The Indus, Ganges, and Brahmaputra Rivers and their tributaries do the work of transporting the weathering products to the Bay of Bengal. You should expect stream transport in the headwater region to be characterized by __________.

saltation of coarse materials as suspended loadfine materials transported as dissolved loadonly dissolved load transported in solutiontraction and saltation of coarse material as bedloadcoarse materials transported as suspended load

This photograph shows part of the Himalaya foothills. Here, local relief is less dramatic than in the uplands, and stream gradients are more gentle. You might expect streams in this area __________.

to develop backswamps and yazoo tributariesto produce alluvial terraces and extensive undercut banks on point barsto become dammed by coarse material that can no longer be transportedto aggrade as coarser materials drop out of suspensionto erode and form entrenched meanders

Population and economic pressure in this region have resulted in increasing pressure to cut forests, as is evident in the photo. Removal of the foothills forests __________.

causes a decrease in material to be transportedprobably doesn't have any effect on the fluvial systemincreases sheetflow, erosion, and sediment inputs into the streamsdecreases sheetflow, erosion, and sediment inputs into the streamscauses the streams to become entrenched

The general fluvial process that creates natural levees along rivers is ________.

tractiondrainagedepositionsaltationdischargeerosion

Based on the pattern you see here, this stretch of the Brahmaputra River is probably characterized by __________. [photo source]

high rates of sediment depositionextremely high dischargehigh levels of toxic pollutionhigh rates of tectonic upliftextreme erosive power

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