Stream Assessment. Date. Data Collected by. Location. Name of Stream and River Basin. Stream Order. Streambank Materials. Streambank Vegetation

Transcription

1 Stream Assessment Date Data Collected by Location Name of Stream and River Basin Stream Order Streambank Materials Streambank Vegetation Floodplain Soils Floodplain Vegetation Valley Type Valley Constraints Watershed Land Cover & Use Channel Incision Altered Conditions Bankfull Stage Indicators Stream Type Drainage Area, DA (sq mi) Valley Length, VL (ft) Stream Length, SL (ft) Sinuosity, k = SL/VL Valley Elevation Change, VE (ft) Stream Elevation Change, SE (ft) Valley Slope, VS (ft/ft) Average Water Surface Slope, S (ft/ft) Mannings Roughness, n Bankfull Velocity, u bkf (ft/s) Bankfull Discharge, Q bkf (cfs)

2 Riffle Dimensions Bankfull cross-section area, A bkf (sq ft) Bankfull width, W bkf (ft) Bankfull mean depth, d bkf = A bkf /W bkf (ft) Width-to-depth ratio, W bkf /d bkf Max depth, d mbkf (ft) Low bank height, LBH (ft) Low bank height ratio, BHR = LBH/d mbkf Width flood-prone area, W fpa (ft) Entrenchment ratio, ER = W fpa /W bkf Pool Dimensions Pool cross-section area, A pool (sq ft) Pool area ratio, A pool /A bkf Pool width, W pool (ft) Pool width ratio, W pool /W bkf Pool mean depth, d pool = A pool W pool (ft) Pool depth ratio, d pool /d bkf Max pool depth, d mpool (ft) Max pool depth ratio, d mpool /d bkf Point bar slope, H:V (ft/ft)

3 Profile Data Riffle length, L rif (ft) Riffle length ratio, L rif /W bkf Riffle slope, S rif (ft/ft) Riffle slope ratio, S rif /S Pool length, L pool (ft) Pool length ratio, L pool /W bkf Pool-to-pool spacing, p-p (ft) Pool-to-pool spacing ratio, p-p/w bkf Pool slope, S pool (ft/ft) Pool slope ratio, S pool /S Run slope, S run (ft/ft) Run slope ratio, S run /S Glide slope, S glide (ft/ft) Glide slope ratio, S glide /S Pattern Meander length, L m (ft) Meander length ratio, L m /W bkf Radius of curvature, R c (ft) Radius of curvature ratio, R c /W bkf Meander belt width, W blt (ft) Meander width ratio, W blt /W bkf Substrate Size D16 (mm) D35 (mm) D50 (mm) D84 (mm) D100 (mm)

4 Cross-Section Survey (Tape-Down) Survey Crew Site Longitudinal STA A bkf (sq ft) W bkf (ft) d mbkf (ft) LBH (ft) W fpa (ft) Date Bed Feature d bkf = A bkf /W bkf W/d = W bkf /d bkf BHR = LBH/d mbkf ER = W fpa /W bkf Station (ft) Bkf Depth (ft) Width (ft) Bkf Area (sq ft) Note TOTAL

5 Cross-Section Survey (Sight or Laser Level) Site Longitudinal STA Survey Crew Date Bed Feature BKF ELV STA BS HI FS ELV Note Width Bkf Depth (ft) Avg Depth (ft) Bkf Area (ft 2 ) STA = Station TW = Thalweg WS = Water Surface BS = Backsight LBKF = Left Bankfull LEW = Left Edge Water HI = Height Instrument RBKF = Right Bankfull REW = Right Edge Water FS = Foresight LTOB = Left Top Bank LIB = Left Inner Berm BM = Benchmark RTOB = Right Top Bank RIB = Right Inner Berm TP = Turning Point ELV = Elevatation

6 Cross-Section Survey (Sight or Laser Level) Site Example Date Longitudinal STA Bed Feature Riffle Survey Crew BKF ELV STA BS HI FS ELV Note Width Bkf Depth (ft) Avg Depth (ft) BM BM LTOB LBKF LEW TW REW RBKF RTOB Bkf Area (ft 2 ) TOTAL STA = Station TW = Thalweg WS = Water Surface BS = Backsight LBKF = Left Bankfull LEW = Left Edge Water HI = Height Instrument RBKF = Right Bankfull REW = Right Edge Water FS = Foresight LTOB = Left Top Bank LIB = Left Inner Berm BM = Benchmark RTOB = Right Top Bank RIB = Right Inner Berm TP = Turning Point ELV = Elevatation

7 Longitudinal Profile Site Longitudinal STA Survey Crew Date Feature Foresight Elevations STA BS HI TW WS LBKF RBKF Other Feature Notes / Description STA = Station TW = Thalweg WS = Water Surface BS = Backsight LBKF = Left Bankfull LEW = Left Edge Water HI = Height Instrument RBKF = Right Bankfull REW = Right Edge Water FS = Foresight LTOB = Left Top Bank LIB = Left Inner Berm BM = Benchmark RTOB = Right Top Bank RIB = Right Inner Berm TP = Turning Point

8 Pebble Count Site: Date: Survey Crew: Particle Description Size (mm) Silt/Clay Silt/Clay < Very Fine Fine Particle Count Riffle Pool Total % Cum % Sand Medium Coarse Very Coarse Very Fine Fine Fine Medium Gravel Medium Coarse Coarse Very Coarse Very Coarse Small Cobble Small Large Large Small Boulder Small Medium Large Bedrock Bedrock > 2048 Total

9 Pebble Count Site: Date: Survey Crew: Cumulative % Particle Size (mm)

10 Bank Erosion Hazard Index Site Date Survey Crew Very Low Low Moderate High Very High Extreme Field Measure Category Bank Ht Ratio Root Depth Ratio Root Density Bank Angle Surface Protection Total (ft/ft) (%) (%) (degrees) (%) Index Value Index < 10 Value Index Value Index Value Index Value Index Value > 2.8 < 5 < 5 > 120 < 5 Index > 45 Value Index Total Field Index Numerical Adjustments Bedrock: BEHI Very Low Boulders: BEHI Low Cobble: Decrease by one category if gravel/sand less than 50% Gravel: Adjust Index up 5 10 points depending on sand % Sand: Adjust Index up 10 points Silt/Clay: No Adjustment Stratification: Adjust Index up 5 10 points depending on position of unstable layers in relation to bankfull stage Adjusted BEHI

11 Pebble Count Particle Size(mm) Description Number Item % Cumulative % <.062 Silt/Clay Very Fine Sand Fine Sand Medium Sand Coarse Sand Very Course Sand Very Fine Gravel Fine Gravel Fine Gravel Medium Gravel Medium Gravel Coarse Gravel Coarse Gravel Very Course Gravel Very Course Gravel Small Cobble Small Cobble Medium Cobble Large Cobble Small Boulders Small Boulders Medium Boulders Large Boulders 0 98 > 2048 Bedrock Total Class Percent Item % Cumulative % Cumulative Percent Finer Particle Size Class (mm)