DOI: 10.7910/dvn/zkynqc
title: Supplemental bed load data for the North Fork of Caspar Creek, CA

description: Data compiled by Paul Richardson, USDA Forest Service Pacific Southwest Research Station. Arcata, CA. paul.richardson@usda.gov &lt;br&gt;
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These data were collected from the North Fork of the Caspar Creek Experimental Watersheds, CA. The Caspar Creek Experimental Watersheds is a long-term USDA Forest Service experimental site in the Coast Ranges of northern California. Measurements began in 1962 and are ongoing. The North Fork watershed was logged of old-growth from the 1860s to1904. An experimental harvest occurred from 1985 to 1992 and approximately 50% of the North Fork watershed was clearcut. &lt;br&gt;
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The data included here are supplemental data for Richardson, P. W., Wagenbrenner, J. W., Sutherland, D. G., & Lisle, T. E. (in review). Measuring and modeling gravel transport at Caspar Creek, CA to detect changes in sediment supply, storage, and transport efficiency. Water Resources Research. &lt;br&gt;
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The Arfstein reach of the North Fork is located ~43 meters upstream of a weir pond at the outlet of the North Fork experimental watershed. Please refer to Richardson et al. (2020) for a map of the North Fork of Caspar Creek. &lt;br&gt;
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Richardson, P. W., Seehafer, J. E., Keppeler, E. T.; Sutherland, D. G., Wagenbrenner, J. W. (2020). Caspar Creek Experimental Watersheds Phase 2 (1985-2017) data. Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2020-0018 &lt;br&gt;
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North Fork data included in this supplemental data release: &lt;br&gt;
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1) Annual data for reconstructing annual gravel yields and predicted gravel yields. &lt;br&gt;
2) Velocity meter data for the Arfstein reach. &lt;br&gt;
3) Surface grain size data near the Arfstein reach. &lt;br&gt;
4) Delta grain size data from the North Fork weir pond. &lt;br&gt; 
5) Channel elevation profile near the Arfstein reach. &lt;br&gt;
6) Channel cross-section elevation data for NFC-18. &lt;br&gt;
7) Channel width and depth near the Arfstein reach for storms. &lt;br&gt;
8) North Fork weir pond sediment data. &lt;br&gt;
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Annual data for reconstructing annual gravel yields and predicted gravel yields &lt;br&gt;
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Data file name: "Annual_data_North_Fork.csv" &lt;br&gt;
Format: comma-seperated values (csv) file &lt;br&gt;
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Annual data reported in Richardson et al. (in review). Reconstructed yields were estimated using the approach described in Richardson et al. (in review). Annual settled suspended sediment yields (SSS_t) were estimated as 27.72% of the measured annual suspended sediment yields (SS_t) for HY1963 to HY1999. For HY2000 onward, SSS_t was calculated from differencing suspended sediment yields upstream and downstream of the weir pond following the method of Richardson et al. (in review). Please refer to Richardson et al (2020) for annual pond volumes. &lt;br&gt; 
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First row indicates column name and units &lt;br&gt;
Columns: &lt;br&gt;
Year_yyyy (Hydrologic year): Hydrologic year for annual values (the hydrologic year is August 1 to July 31 at Caspar Creek. For example, HY1963 refers to August 1 1962 to July 31 1963). &lt;br&gt; 
SS_t (metric tons): Suspended sediment yield measured at the North Fork weir. &lt;br&gt;
SSS_t (metric tons): Settled suspended sediment yield in the North Fork weir pond. &lt;br&gt;
Bed_t (metric tons): Reconstructed bed load yield in the North Fork weir pond. &lt;br&gt;
Bed_std_t (metric tons): Standard deviation of annual bed load yield “Bed_t.” &lt;br&gt;
Gravel_t (metric tons): Reconstructed gravel yield in the North For weir pond. &lt;br&gt;
Gravel_std_t (metric tons): Standard deviation of annual gravel yield “Gravel_t.” &lt;br&gt;
Gravel_MS_t (metric tons): Predicted annual gravel yield for the monitored storms approach (see Richardson et al., in review). &lt;br&gt;
Gravel_Nat_t (metric tons): Predicted annual gravel yield for the natural x-section approach (see Richardson et al., in review). &lt;br&gt;
Gravel_Eng_t (metric tons): Predicted annual gravel yield for the engineered x-section approach (see Richardson et al., in review). &lt;br&gt;
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Velocity meter data for the Arfstein reach &lt;br&gt;
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Data file name: "Velocity_meter_data_Arfstein.csv" &lt;br&gt;
Format: comma-seperated values (csv) file &lt;br&gt;
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Water velocity measurements were made with a velocimeter at the Arfstein reach. We report on measurements made from 1983 to 1993. Multiple velocity measurements were made across the width of the channel for each set of measurements. We report on the mean velocity for the entire channel width. Measurements were made from a bridge. The width of the stream below the bridge is 4.42 m. This engineered reach has been modified through time, but the width has remained similar. &lt;br&gt;
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First row indicates column name and units &lt;br&gt;
Columns: &lt;br&gt;
Date_mm/dd/yyyy (month/day/year): Date of measurement. &lt;br&gt;
Velocity_m3/s (cubic meters/second): mean measured velocity for corresponding "Date_mm/dd/yyyy." &lt;br&gt;
Water_h_m (meters): mean water depth at velocity measurement site for measurement for corresponding "Date_mm/dd/yyyy." &lt;br&gt;
Q_m3/s (cubic meters per second): Discharge for “Date_mm/dd/yyyy” calculated from velocity measurements made for corresponding “Date_mm/dd/yyyy.” &lt;br&gt;
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Surface grain size data near the Arfstein reach &lt;br&gt;
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Data file name: "Surface_grain_size_Arfstein.csv" &lt;br&gt;
Format: comma-separated values (csv) file &lt;br&gt;
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Grain size data are from a surface pebble count of the streambed made near the Arfstein reach summer 1993. &lt;br&gt;
The reach is a uniform, straight riffle reach and the pebble count was distributed over the entire reach. &lt;br&gt;
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First row indicates column name and units &lt;br&gt;
Columns: &lt;br&gt;
D_mm (millimeters): Grain size diameter. &lt;br&gt;
Frac_finer (fraction): Fraction finer than "D_mm” for that grain size only. &lt;br&gt; 
Cum_frac_finer (fraction): Cumulative fraction finer than "D_mm." &lt;br&gt;
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Delta grain size data from the North Fork weir pond &lt;br&gt;
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Data file name: "Delta_grain_size_North_Fork.csv" &lt;br&gt;
Format: comma-separated values (csv) file &lt;br&gt;
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Grain size data are from a bulk sediment sample collected on August 16, 2018 from the delta in the North Fork weir pond. Bulk sediment samples were collected below the armored surface layer (~ 5 cm) of the delta. &lt;br&gt;
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First row indicates column name and units &lt;br&gt;
Columns: &lt;br&gt;
D_mm (millimeters): Grain size diameter. &lt;br&gt;
Frac_finer (fraction): Fraction finer than "D_mm" for that grain size only. &lt;br&gt;
Cum_frac_finer (fraction): Cumulative fraction finer than "D_mm." &lt;br&gt;
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Channel elevation profile near the Arfstein reach &lt;br&gt;
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Data file name: "Elevation_profile_Arfstein.csv" &lt;br&gt;
Format: comma-seperated values (csv) file &lt;br&gt;
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Channel elevation data for the reach that begins near the upstream end of the North Fork weir pond and continues upstream of the Arfstein gauging station. Data were collected summer 2018. Elevation was measured along the right edge of the water surface during low flow conditions. The Arfstein station is located at an upstream distance of ~33 m (downstream end of the concrete pad at the engineered Arfstein x-section). &lt;br&gt;
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First row indicates column name and units &lt;br&gt;
Columns: &lt;br&gt;
Distance_m (meters): Distance upstream of the North Fork weir pond. &lt;br&gt; 
Elevation_m (meters): Elevation corresponding to "Distance_m." &lt;br&gt;
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Channel cross-section elevation data for NFC-18 &lt;br&gt;
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Data file name: "XS_NFC-18_elevation.csv" &lt;br&gt;
Format: comma-seperated values (csv) file &lt;br&gt;
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Cross-section data are for XS NFC-18, which is ~16 meters upstream of the Arfstein station. Data were collected on April 9, 2015. Elevation and distance measured from base of permanent cross-section pin on stream left. &lt;br&gt; 
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First row indicates column name and units &lt;br&gt;
Columns: &lt;br&gt;
Distance_m (meters): Distance from stream-left cross-section pin. &lt;br&gt; 
Elevation_m (meters): Elevation relative to base of stream-left cross-section pin corresponding to "Distance_m." 
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Channel width and depth near the Arfstein reach for storms &lt;br&gt;
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Data file name: "Storm_measurements_Arfstein.csv" &lt;br&gt;
Format: comma-separated values (csv) file &lt;br&gt;
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Stream width and water depth were measured during 7 storms that occurred between 1978 and 1980. These measurements were made at the same location along the Arfstein reach before the gauging station was installed. &lt;br&gt;
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First row indicates column name and units &lt;br&gt;
Columns: &lt;br&gt;
Date_mm/dd/yyyy (month/day/year): Measurement date. &lt;br&gt;
Stream_w_m (meters): Stream width. &lt;br&gt; 
Stream_h_m (meters): Mean water depth for "Stream_width_m." &lt;br&gt;
Q_Arf_m3/s (cubic meters/second): Discharge through the Arfstein reach estimated as 0.85 of the North Fork discharge. &lt;br&gt;


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North Fork weir pond sediment data &lt;br&gt;
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Data file name: "North_Fork_pond_sediment_data.csv" &lt;br&gt;
Format: comma-separated values (csv) file &lt;br&gt;
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Pond sediment samples were collected from the North Fork weir pond along cross-sections perpendicular to the flow direction and spaced 3 to 4 meters apart. The samples were collected during summer 2018 after the pond was drained in preparation for a sediment cleanout. The first cross-section was located immediately upstream of the weir. Samples were collected in a sampling sleeve or can. Depending on the accessibility at each cross-section, between one and seven samples were collected. Samples were oven-dried, weighted and separated into &gt; 2 mm and &lt; 2 mm subsamples. For each subsample, the organic material was separated and weighted. To determine the organic fraction of the subsample &lt; 2 mm, loss on ignition analysis was completed. The organic fraction and gravel fraction for each complete sample was calculated. &lt;br&gt; 
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The first number of the sample name refer to distance (m) from the weir. The letter refers to stream left (L), stream right (R), or middle (M). When a trailing number is present, it refers to the sample depth (cm). &lt;br&gt; 
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First row indicates column name and units &lt;br&gt;
Columns: &lt;br&gt;
Sample: Sample name. &lt;br&gt;
Total_weight_g (grams): Total oven-dried sample weight. &lt;br&gt;
Gravel_weight_g (grams): Gravel weight (&gt; 2 mm) excluding organics. &lt;br&gt; 
Coarse_organic_weight_g (grams): Weight of organic material for subsample &gt; 2mm. &lt;br&gt; 
Fine_Weight_g (grams): Weight of sediment and organic material for subsample &lt; 2 mm. &lt;br&gt;
Percent_organic_fine (percent): Percentage of organic material for fine sediment subsample "Fine_Weight_g" determined from loss on ignition analysis. &lt;br&gt;
Percent_organic_total (percent): Percentage of organic material for complete sample determined from loss on ignition analysis for the fine sediment subsample (&lt; 2 mm) and weighting the coarse organic material in the gravel subsample (&gt; 2 mm). &lt;br&gt;
Density_g/cm3 (grams/cubic centimeter): Sample density (dry) including organic material. &lt;br&gt; 
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