A Stream 69 



Study 4 

 A STREAM 



Work Program: 



1. An examination of the physical features of a local stream. 



2. A gathering from maps, charts, surveys, etc., of such data as may be available 



concerning it. 



3. Reading in the Life of Inland Waters, pp. 77 to 88 about streams in general, and 



in such works as may be available about the particular stream selected for this 

 study. 



For Record include: 



1. A sketch map of the entire stream. 



2. Detail maps of any part of it that are to be selected for special study later. 



3. A profile (unless done under Study I). 



4. A description of it with notes arranged under the following principal headings: 



A. The stream : its sources, affluents, outlet, length and volume and permanence 



B. The water: its color, turbidity, temperature and chemical character. 



C. The stream bed. 



(a) Its configuration — falls, riffles and runs — their height, length and con- 



tinuity. Plunge, scour and settling basins. 



(b) Its materials — fixed ledges, stones, logs, etc. — shifting gravel, sand, 



mud, etc. 



D. The banks: 



(a) Their elevation (at mean water level) and uniformity'. 



(b) Relation of channel, flats and shoals. 



(c) Shore vegetation and shade. 



(d) Changes due to eroding, aggrading and obstructions. 



E. Habitats: percentage in falls and riffles. 



percentage in runs. 



percentage in slack water (no visible current). 



percentage in mill dams and ponds. 



F. Miscellaneous: pollution: its places, sources, nature, extent. 



Other artificial alterations; constructions; plantings, etc. 



