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____ refers to sand grain movement in a series of short leaps or bounces off the bottom

Continental divide

In North America, the ___ separates streams that flow into the Pacific Ocean from those that flow into the Atlantic Ocean and Gulf of Mexico.


A(n) ____ stream is one that exhibits a delicate balance between its transporting capacity and the sediment load available to it


A "100-year flood" has a _______ percent chance of occurring in any given year


The limit to downcutting of a stream is called the ___ level


____ meanders are meanders that retain their sinuous pattern as they cut vertically downward below the level at which they originally formed

Stream terrace

A(n) ___ is a step-like landform found above a stream and its floodplain. It is a remnant of an older flood plain or river-eroded flat surface


Movement of cobbles and boulders by rolling, sliding, or dragging in a streambed is called ____ load.

Down cutting

The process of deepening of a valley by erosion of a streambed is called __


On large alluvial fans, the _____ sediment is deposited near the mountains

Natural levees

_____ are low ridges of flood-deposited sediment that form on both sides of a stream channel and thin away from the channel

Recurrence interval

Floods are described by ____, the average time between floods of a given size

Oxbow lake

A cutoff meander may become a crescent-shaped __


A graded stream can be deepening its channel by down cutting while part of its energy is also widening its valley by ______ erosion

Artificial levees

Flood control structures along the Mississippi River surrounding New Orleans are predominantly ____


A _____ is a ridge of sediment built by sedimentation on the middle or banks of a stream channel

All of above

Streams erode rock and sediment by ___

Channel shape & roughness

___ influences the velocity of a river along with gradient


A(n) ___ stream flows in a network of rivulets (subchannels) around numerous sandbars


A(n) ___ drainage pattern of a river resembles a tree.


The ______ load is sediment light enough to remain lifted indefinitely above the bottom by water turbulence


A ____ drainage pattern is one in which streams diverge outward likes spokes on a wheel

Flash floods

___ is/are sudden localized floods of large volume and short duration, often triggered by heavy rainstorms


A(n) __ is the body of sediment deposited at the mouth of a river when the river's velocity decreases

All of above

A stream can increase its length by ____

stream's discharge

A ___ is the volume of water passing through a specific point along the stream in a unit of time.


Rivers may develop pronounced sinuous curves called a ___ pattern

Natural levees

_____ are low ridges of flood deposited sediment that form on either side of a stream channel and thin away from the channel

Drainage basin

The ______ is the total area drained by a river and its tributaries

Sliding & rolling

The gravel bed load of a stream moves by ___

Stream velocity

Discharge is the product of average stream width times average stream depth times ___


A river's velocity is ___ along the outside of a meander loop near the cut bank


A ridge or strip of ground separating one drainage basin from another is termed a ___

Hydrologic cycle

The movement and interchange of water between the sea, air and land can be visualized by the ____

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