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Introduction How Rivers Run Stories Value Of A River What We Can Do
Shape of a River - Geomorphology
Habitat (pg 2 of 2)

As water moves through a meandering channel, changes in streamflow cause the sediment to be scoured, sorted, and deposited in riffles and pools.

Floods cause scour in pools which makes the pools deeper. Larger particles such as gravel, cobble and boulders tend to deposit in riffles during floods and high flows. However, during low flows finer particles such as sand and silt deposit in pools and fine sediment is scoured from riffles.

Riffle habitat provides feeding locations for many species of fish and spawning habitat for species such as walleye, lake sturgeon, trout, darters, and suckers. Many aquatic invertebrates rely on riffle habitat. Pools and eddies provide spawning and feeding areas for species such as smallmouth bass, and provide some invertebrate species with slow water and finer sediment.

Luther Aadland
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Sediments are key to stream productivity

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Introduction
Flow
Shape
Description
Variables
Bankfull flows
Classification
Sediment
Patterns
Slope
Habitat
Change
Consequences
Stories
Connections
Quality
Life
Summary
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