2013.03....e 6.1.pdf - Cram

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Figure 3: Diagram of the lateral extent of a riverine AA that includes the portion of the riparian area that can help stabilize the channel banks and that can readily provide allochthonous inputs of plant matter, insects, etc. to the channel and its immediate floodplain. The AA extends to the outside edge (the dripline) of any trees overhanging the floodplain. Table 1: Examples of features that should be used to establish AA boundaries. *Please refer to the CRAM Photo Dictionary at www.cramwetlands.org for photos of each of the following examples. • major changes in riverine entrenchment, confinement, degradation, aggradation, slope, or bed form • major channel confluences • diversion ditches • end-of-pipe large discharges • water falls • open water areas more than 30 m wide on average or broader than the wetland • transitions between wetland types • weirs, culverts, dams, drop- structures, levees, and other flow control, grade control, or water height control structures 9
Table 2: Examples of features that should not be used to establish AA boundaries for Riverine wetlands. *Please refer to the CRAM Photo Dictionary at www.cramwetlands.org for photos of the following examples. • at-grade, unpaved, single-lane, infrequently used roadways or crossings • bike paths and jogging trails at grade • bare ground within what would otherwise be the AA boundary • equestrian trails • fences (unless designed to obstruct the movement of wildlife) • property boundaries, unless access is not allowed • riffle (or rapid) – glide – pool transitions in a riverine wetland • spatial changes in land cover or land use along the wetland border • state and federal jurisdictional boundaries Table 3: Recommended maximum and minimum AA sizes for the Riverine wetland type. Note: Wetlands smaller than the recommended AA sizes can be assessed in their entirety. Wetland Type Confined and Nonconfined Riverine Recommended AA Size Recommended reach length is 10x average bankfull channel width; maximum reach length is 200 m; minimum reach length is 100 m. 10
Page 1: ` California Rapid Assessment Metho
Page 4 and 5: Photo Identification Numbers and De
Page 6 and 7: Identify Wetland Type Figure 1: Flo
Page 8 and 9: Valley Width A B Bankfull Width C D
Page 12 and 13: Attribute 1: Buffer and Landscape C
Page 14 and 15: Table 5a: Rating for Stream Corrido
Page 16 and 17: Figure 5: Diagram of approach to es
Page 18 and 19: Submetric B: Average Buffer Width D
Page 20 and 21: Submetric C: Buffer Condition Defin
Page 22 and 23: Table 11: Rating for Water Source.
Page 24 and 25: Worksheet for Assessing Channel Sta
Page 26 and 27: Riverine Wetland Entrenchment Ratio
Page 28 and 29: Metric 1: Structural Patch Richness
Page 30 and 31: Structural Patch Type Worksheet for
Page 32 and 33: Worksheet for AA Topographic Comple
Page 34 and 35: Table 16: Rating of Topographic Com
Page 36 and 37: Layer definitions: Floating Layer.
Page 38 and 39: Table 17: Plant layer heights for a
Page 40 and 41: Metric 2: Horizontal Interspersion
Page 42 and 43: Metric 3: Vertical Biotic Structure
Page 44 and 45: Stressor Checklist Worksheet HYDROL
Page 46: CRAM Score Guidelines Step 1: Calcu

2013.03....e 6.1.pdf - Cram

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