By Richard W. Spjut
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Extra resources for A Systematic Treatment of Fruit Types
All but the largest rivers in Florida may run dry once every few decades. The definition of a "permanent stream" in Florida should accommodate those rare occasions when extreme droughts cause otherwise perennial streams to cease flowing. Channel and Floodplain Characteristics Florida streams are characterized with regard to their flow, channel defmition, and floodplain geomorphology. These characteristics are expressed prominently in streams with relatively strong velocities at flood stage. They are subtle on more gently flowing streams.
At present, it is doubtful that a more consistent, multipurpose classification could be devised that incorporates the wealth of characteristics generally associated with Florida's streams. The biggest problem is lack of information. F. Tanner (personal communication, 1989), "Most Florida rivers have not been studied in any detail, and the data on channel characteristics, water flow and sediment ttansportare very sparse. " Basic information is lacking, such as a catalog of river gradients in Florida.
These bathymetric features can change drastically as a result of riverine flooding or tropical stonns. Channel geometry has an impact on each of the other factors affecting flow in the tidal reach. Narrow channels tend to have higher velocities than broad channels. Broad, shallow channels have more area that can be affected by frictional forces. Wind has a greater effect on broad, shallow channels. Stratification tends to decrease with increasing width and decreasing depth. River bars and sills may increase vertical stratification by reducing flushing of salty bottom waters.
A Systematic Treatment of Fruit Types by Richard W. Spjut