Exam 14: River Systems

In a given section of channel,the greatest flow velocities are usually

A drainage divide that separates drainage basins that empty into different bodies of water surrounding a continent is known as

The Horton River delta has an intricate maze of distributaries in an arc-shaped pattern.This is an example of a(n)_ ___delta.

A basin in which water leaves via evapotranspiration or subsurface gravitational flow instead of reaching the ocean is said to have

_____streams begin in moist regions and flow downstream into arid landscapes with high evapotranspiration.

With no clear geometry and no true stream valley,this drainage pattern occurs in areas such as glaciated shield regions.

The entrenchment of a river into its own floodplain can produce

The process whereby streams deepen their channel is known as

As a stream's velocity decreases,which of the following sizes of sediments will be deposited last?

_____is the general term for unconsolidated clay,silt,sand,gravel,and mineral fragments deposited by running water.

The sediment load consisting of fine-grained clastic particles held aloft in the stream is the

If a stream originates in a humid region,but subsequently flows through an arid region,discharge is likely highest

What is the drainage density of a 100 mi2 drainage basin with 25 miles of stream,running through three rivers?

Overland flow can concentrate in small grooves called____ ,which can enlarge to form _____.

In stream formation,surface water initially moves down slope in a thin film called

Stream drainage patterns are determined by which of the following?

The statistical rating of flood discharge is based on

The Paraná River is in the process of filling in an enclosed body of water at the river's mouth.This is an example of a(n)____delta.

____streams have some groundwater input,but only flow for certain periods during a year.

A drainage system that maintains its original course and pattern as it erodes into underlying horizontal beds of different structure than that in which the system evolved is called a(n)