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| A gently sloping, fan-shaped mass of alluvium deposited in arid or semiarid regions where a stream flows from a narrow canyon onto a plain or valley floor. |
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| Stream-deposited sediment. |
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| An embankment constructed to contain a stream at flood stage. See levee. |
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| The level below which a stream cannot erode its bed. The ultimate base level is sea level. |
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| : A drainage divide that separates streams flowing toward opposite sides of a continent. |
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| A new channel that is formed when a stream cuts through a very tight meander. (See oxbow lake.) |
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| The nearly flat land formed where a stream empties into a body of standing water, such as a lake or the ocean. |
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| The volume of water, usually expressed in cfs, that passes a given point within a given period of time. |
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| The tract of land that contributes water to a particular stream, lade, reservoir, or other body of surface water. |
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| The boundary between two drainage basins (see continental divide). |
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| The average time interval between floods that are equal to or greater than a specified discharge. |
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| The portion of a river valley adjacent to the channel that is built of sediments deposited during times when the river overflows its banks at flood stage. |
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| A heavily reinforced wall designed to contain a stream at flood stage. |
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| All geologic processes for example--wind, running water, glaciers, waves, mass wasting--that erode, move, and deposit earth materials. |
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| A stream that is in equilibrium, showing a balance of erosion, transporting capacity, and material supplied to it. Graded streams have a smooth profile. |
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| The slope of a streambed usually expressed as the amount of drop per horizontal distance in meters per kilometer (m/km) or in feet per mile (ft/mi). |
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| A graph of the stage (height), discharge, velocity, or some other characteristic of a body of water over time. |
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| The study of liquid and solid water on, under, and above the earth’s surface, including economic and environmental aspects. |
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| One of a series of sinuous curves in the course of a stream. |
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| A crescent-shaped lake formed along a stream course when a tight meander is cut off and abandoned. |
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| A deposit of sand and gravel found on the inside curve of a meander. |
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| The return period of an event, such as a flood or earthquake, of a given magnitude. For flooding, it is the average interval of time within which a give flood will be equaled or exceeded by the annual maximum discharge. |
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| The part of a flood plain that is subject to federal government regulation for insurance purposes. |
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| Pertaining to or situated on the bank of a body or water, especially of a river. |
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