Exam 12: Drainage Basins and Drainage Patterns

Stream drainage patterns are determined by which of the following?

The high ground that separates one valley from another and directs sheetflow is known as

The general term for channelized water flow,regardless of size,is

A tributary that is physically unable to join the main channel on a floodplain due to natural levees is called a

Entrenchment of a channel occurs because

An alluvial terrace is evidence of aggradation.

This drainage pattern results when streams flow off a central peak or dome.

Maximum velocity in a meandering stream is

The sediment load consisting of coarse material too large to remain in suspension,moving along the channel bottom via traction and saltation is the

The mouth of a river is where the river reaches base level.

A drainage system that maintains its original course and pattern as it erodes into older underlying rock of a different geological structure is called a(n)

A yazoo tributary stream cannot join with the main river in an area because

Terraces form when a riverʹs energy increases.

A stream that downcuts at the same rate as tectonic uplift,thereby maintaining its course is called a(n)

Watersheds are defined by

_______streams flow year-round,fed by snowmelt,rainfall,groundwater,or a combination thereof.

When a dam and reservoir are constructed,the natural response of the river and its channel gradient come under the control of

If the load exceeds a streamʹs capacity,sediment accumulates in the bed in a process called

Drainage basins may cross into multiple countries,compounding the difficulties in proper watershed management.

The main process contributing material in solution in sediment load is