2013.03....e 6.1.pdf - Cram

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Structural Patch Type Worksheet for Riverine wetlands Circle each type of patch that is observed in the AA and enter the total number of observed patches in Table below. In the case of riverine wetlands, their status as confined or non-confined must first be determined (see page 6) to determine with patches are expected in the system (indicated by a “1” in the table below). Any feature onsite should only be counted once as a patch type. If a feature appears to meet the definition of more than one patch type (i.e. swale and secondary channel) the practitioner should choose which patch type best illustrates the feature. Not all features at a site will be patch types. *Please refer to the CRAM Photo Dictionary at www.cramwetlands.org for photos of each of the following patch types. STRUCTURAL PATCH TYPE (circle for presence) Riverine (Non-confined) Riverine (Confined) Minimum Patch Size 3 m 2 3 m 2 Abundant wrackline or organic debris in channel, on floodplain 1 1 Bank slumps or undercut banks in channels or along shoreline 1 1 Cobbles and/or Boulders 1 1 Debris jams 1 1 Filamentous macroalgae or algal mats 1 1 Large woody debris 1 1 Pannes or pools on floodplain 1 N/A Plant hummocks and/or sediment mounds 1 1 Point bars and in-channel bars 1 1 Pools or depressions in channels (wet or dry channels) 1 1 Riffles or rapids (wet or dry channels) 1 1 Secondary channels on floodplains or along shorelines 1 N/A Standing snags (at least 3 m tall) 1 1 Submerged vegetation 1 N/A Swales on floodplain or along shoreline 1 N/A Variegated, convoluted, or crenulated foreshore (instead of broadly arcuate or mostly straight) 1 1 Vegetated islands (mostly above high-water) 1 N/A Total Possible 17 12 No. Observed Patch Types (enter here and use in Table 14 below) 29
Table 14: Rating of Structural Patch Richness (based on results from worksheet above). Rating Confined Riverine Non-confined Riverine A ≥ 8 ≥ 12 B 6 – 7 9 – 11 C 4 – 5 6 – 8 D ≤ 3 ≤ 5 Metric 2: Topographic Complexity Definition: Topographic complexity refers to the micro- and macro-topographic relief and variety of elevations within a wetland due to physical and abiotic features and elevation gradients that affect moisture gradients or that influence the path of flowing water. Table 15 indicates the range of topographic features that occur in riverine wetlands. Special Note: *Definition: Bench: a relatively level topographic surface that exists at or above the channel-forming discharge of the channel (e.g. a floodplain or terrace). It is connected and parallel to the bank. It does not include surfaces within the active channel composed of the same size material being transported as bedload (e.g. bars). The surface should be wide enough to provide measurable hydraulic effects for the stream in which it exists (generally at least 0.5 m for very small streams, but the "effective" size of the bench will be wider in larger systems) and should be present for a significant distance along the AA reach. As stream water level rises and each surface is inundated, the bench allows for increased wetted perimeter length without a major increase in water depth. Water flowing over these surfaces will have different hydraulic dynamics compared to water flowing in the active channel, typically having reduced velocity and shear stress. The effect of each bench is an increase in the range of complex velocity dynamics in the stream cross-section and an increase in the range of moisture gradients and thus habitat complexity. Table 15: Typical indicators of Macro- and Micro-topographic Complexity for the Riverine wetlands. Type Examples of Topographic Features Riverine pools, runs, glides, pits, ponds, sediment mounds, bars, debris jams, cobble, boulders, slump blocks, tree-fall holes, plant hummocks This metric is scored for wadeable streams using the alternative states described in Table 16, based on carefully drawing three bank-to-bank cross-sectional profiles across the AA, ideally associated with the three sets of measurements completed for the Hydrological Connectivity metric (by convention the crosssection is drawn looking downstream), then by comparing the cross-sections to the generalized conditions illustrated in Figure 10 below. For non-wadeable streams the drawings and the reference profile from Figure 10 may be one-sided. 30
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 10 and 11: Figure 3: Diagram of the lateral ex
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 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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