Woody snags WD Overhanging vegetation (terrestrial) OV Undercut banks UB Boulders BO Sloughs SL Macrophytes-emergent ME (These are macrophytes that are rooted to the bottom but have parts that extend above the surface.) Macrophytes-submerged MS (These are macrophytes that grow under water and up to the water surface. Some submerged macrophytes may have seed heads that extend above the surface. However, unlike emergent macrophytes, submerged macrophytes are dependent upon the water column for support.) Macrophytes-floating ML (These are macrophytes that float in or on the water and obtain nutrients from the water rather than from the soil.) Rubbish (human produced) RU Other OT None NO
In turbid wadeable reaches and in nonwadeable reaches, only those habitat features that are easily determined are recorded.
Figure 8.--Measurement of canopy angle in degrees, based on measurements of the angles formed from the line of sight to the visible horizon (modified from Platts and others, 1983).