Data Series 1062

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## Appendix IThe appendix contains metrics for each of the datasets used in the compilation of the Reservoir Morphology Database (RMD) and a definition of each. Numbers in parentheses indicate original data source or reference. In the database, the symbol “—“ indicates data are not available. - Dam_name—The official name of the dam or impoundment. No abbreviations used unless a part of the official name. Popular name used when the dam does not have official name (1).
- Other_dam_name—Previous name of the dam. Name which is used commonly other than the official name (1).
- State—State in which the dam and reservoir are located according to the NID (1).
- NIDID—Unique identification number issued by the U.S. Army Corps of Engineers. Formerly known as the National ID (1).
- Year_Completed— Year construction was completed on dam (1).
- Reservoir_Age— The year 2015 minus the year construction was completed.
- Hydraulic_Height (feet)—The vertical difference between the maximum design water level and the lowest point in the original streambed (1).
- NID_Height (feet)—A calculated value based on dam height, structural height, and hydraulic height that provides a single value to facilitate database queries (1).
- Maximum_Discharge (cubic feet/second)—Maximum discharge from the reservoir that the spillway can accommodate (1).
- Maximum_Storage (acre-feet)—The total storage space in a reservoir below the maximum attainable water surface elevation (1).
- Normal_Storage (acre-feet)—The total storage space in a reservoir below the normal retention level, including dead and inactive storage and excluding any flood control or surface storage (1).
- NID_Storage (acre-feet)—Volume calculated by the NID based on the maximum storage and normal storage that provides a single storage value to facilitate database queries (1).
- NID_Storage (cubic feet)—Volume calculated by the NID based on the maximum storage and normal storage that provides a single storage value multiplied by 43,560 (1).
- Surface_Area (acres)—The number of acres covered by the surface of the reservoir at its normal retention level (1).
- Surface_Area (square feet)—The number of acres covered by the surface of the reservoir at its normal retention level multiplied by 43,560 (8).
- Surface_Area (square miles)—The number of acres covered by the surface of the reservoir at its normal retention level, which is equal to acre—feet multiplied by 0.0015625 (8).
- Surface_Area (square meters)—The number of acres covered by the surface of the reservoir at its normal retention level multiplied by 4046.86 (8).
- Surface_Area (square kilometers)—The number of acres covered by the surface of the reservoir at its normal retention level multiplied by 0.00404686 (8).
- Drainage_Area (square miles)—The area of land where all the water which drains from it or beneath it collects in the same place (1).
- Drainage_Area (square kilometers)—The area of land where all the water which drains from it or beneath it collects in the same place (8).
- Drainage_Area (acres)—The area of land where all the water which drains from it or beneath it collects in the same place (8).
- Drainage_Area (square feet)—The area of land where all the water which drains from it or beneath it collects in the same place (8).
- Reservoir_Perimeter (feet)—Length of the reservoir shoreline calculated in ArcGIS from National Hydrography Dataset digitized from USGS Topographic Maps (4).
- Reservoir_Perimeter (kilometer)—Length of the reservoir shoreline calculated in ArcGIS from National Hydrography Dataset digitized from USGS Topographic Maps (8).
- Reservoir_Perimeter (miles)—Length of the reservoir shoreline calculated in ArcGIS from National Hydrography Dataset digitized from USGS Topographic Maps (8).
- Shoreline_Development_Index—Unitless number calculated by dividing the shoreline distance by the perimeter of a circle of the same area as the lake. (DL) = SL / 2*√ (π*A
_{0}) where SL is the reservoir perimeter and A_{0}is the area of the lake (2). - Reservoir_Perimeter (kilometer)—Length of the reservoir shoreline calculated in ArcGIS from National Hydrography Dataset digitized from USGS Topographic Maps (8).
- Mean_Depth (Z
_{mean})—Volume divided by the surface area. Z_{mean}= V/A_{0}where V is the volume of the reservoir at normal storage and A_{0}is the area of the reservoir (2). - Reservoir_Perimeter (kilometer)—Length of the reservoir shoreline calculated in ArcGIS from National Hydrography Dataset digitized from USGS Topographic Maps (8).
- Index_of_Basin_Permanence (IBP)—A morphometric index that is a reflection of the littoral effect on basin volume. IBP = V/SL where V is the volume of the reservoir at normal storage and SL is the length of the reservoir perimeter (11).
- Development_of_Volume (Dv)—A measure of the departure of the shape of the lake basin from that of a cone. (D
_{v})= 3*Z_{mean}/Z_{max}where Z_{mean}is the mean depth of the reservoir and Z_{max}is the maximum depth of the reservoir as hydraulic height (2). - Maximum_Depth (Z
_{max})—In feet as hydraulic height (1). - Mean_Depth_Maximum_Depth_Ratio (Depth Ratio)—As depth ratio decreases, potential nutrient recycling from the sediment surface, productivity, and sediment accretion rate increases (6).
- Mean_Q (cubic feet/second)—Average amount of water passing a given point per unit of time (7).
- Catchment_Area_Surface_Area_Ratio—Calculated as drainage area divided by surface area of the reservoir (10).
- Relative_Depth (Zr)—The maximum depth as a percentage of mean diameter. Z
_{r}= 50 * Z_{max}* √ (π)*(√(A_{0}) (3). - Surface_Area_Lake_Volume_Ratio—Calculated as surface area divided by the reservoir volume at normal storage (9).
- Lake_Volume (cubic feet) (8).
- Lake_Volume (cubic meters) (8).
- Lake_Volume (106 cubic meters) (8).
- AreaSqKm—Area of an areal feature based on Albers Equal Area conic (4).
- Elevation (meters)—Vertical distance from a given datum (4).
- GNIS_Name—U.S. Board on Geographic Names Identification System feature name by which a particular geographic feature is known (4).
- ReachCode—Unique identifier for a 'reach'. The first eight numbers are the WBD_HUC8. The next six numbers are randomly assigned, sequential numbers that are unique within a HUC 14-character value (4).
- E2RF1 —A secondary unique reach identification number that reflects revisions in process steps (5).
- HUC—Hydrologic Cataloging unit of the reach (5).
- MEANV(feet per second)—Velocity corresponding to mean streamflow for reach (5).
- STRAHLER—Strahler stream order of the reach (5).
- RR—"River Reach" identifier. An 11-digit identification number consisting of an 8-digit hydrologic unit code and 3-digit reach segment number (5).
- REACH—Unique five-digit ERF1_2 reach identifying code (7).
- NUTCODE—The U.S. Environmental Protection Agency "nutrient criteria" region codes for 14 regions for the conterminous United States (7).
- PSEWER—The percentage of the total population on public sewage systems from the 1990 U.S. Bureau of Census estimated for the total drainage area above the reach as defined by DEMTAREA (7).
- PSEPTIC—The percentage of the total population on septic systems from the 1990 U.S. Bureau of Census estimated for the total drainage area above the reach as defined by DEMTAREA (7).
- POTHER—The percentage of the total population on disposal systems other that public sewage or septic from the 1990 U. S Bureau of Census estimated for the total drainage area above the reach as defined by DEMTAREA (7).
- WATER—Percentage of total drainage area in water (1992 NLCD open water and perennial ice/snow land-use classes 11, 12) (7).
- WETLANDS—Percentage of total drainage area in wetlands (1992 NLCD woody and emergent herbaceous land-use classes 91, 92) (7).
- URBGRASS—Percentage of total drainage area in urban and recreational grasses (1992 NLCD land-use class 85) (7).
- LURBAN—Percentage of total drainage area in low-intensity residential land (1992 NLCD land-use class 21) (7).
- HURBAN—Percentage of total drainage area in high-intensity residential land (1992 land-use class 22) (7).
- COMM—Percentage of total drainage area in commercial/industrial/transportation land (1992 NLCD land-use class 23) (7).
- FORESTD—Percentage of total drainage area in deciduous forested land (1992 NLCD land-use class 41) (7).
- FORESTE—Percentage of total drainage area in evergreen forested land (1992 NLCD land-use class 43) (7).
- FORESTM—Percentage of total drainage area in mixed forested land (1992 NLCD land-use class 43) (7).
- SHRUB—Percentage of total drainage area in shrub land (1992 NLCD land-use class 51) (7).
- GRASS—Percentage of total drainage area in grass and herbaceous lands (1992 NLCD land-use class 71) (7).
- PASTURE—Percentage of total drainage area in pasture/hay land (1992 NLCD land-use class 81) (7).
- CROPS—Percentage of total drainage area in cultivated land, including row crops, small grains, and fallow land (1992 NLCD land-use classes 82, 83, 84) (7).
- ORCHARDS—Percentage of total drainage area in orchards, vineyards, other
- 1992 NLCD land-use class 61) (7).
- BARREN—Percentage of total drainage area in quarries and barren, transitional lands (1992 NLCD land-use classes 31, 32, 33) (7).
- TNLOADB—Natural background mean-annual total nitrogen load from the reach (kg/yr) (7).
- TPLOADB—Natural background mean-annual total phosphorus load from the reach (kg/yr) (7).
- TNYLDB—Natural background mean-annual total nitrogen yield for the total drainage area (kg/km
^{2}/yr) (7). - TPYLDB—Natural background mean-annual total phosphorus yield for the total drainage area (kg/km
^{2}/yr) (7). - TNCONCB—Flow-weighted natural background mean-annual total nitrogen concentration at the reach outlet (mg/L) (7).
- TPCONCB—Flow-weighted natural background mean-annual total phosphorus concentration at the reach outlet (mg/L) (7).
- TNLOADBW—Natural background mean-annual total nitrogen load from the reach (kg/yr): includes atmospheric deposition (7).
- TNYLDBW—Natural background mean-annual total nitrogen yield for the total drainage area (kg/km
^{2}/yr): includes atmospheric deposition (7). - TNCONCBW—Natural background mean-annual total nitrogen concentration at the reach outlet (mg/L): includes atmospheric deposition (7).
- TNLOAD—Total nitrogen load (kg/yr) at the reach outlet for long-term mean-annual conditions (7).
- TPLOAD—Total phosphorus load (kg/yr) at the reach outlet for long-term mean—annual conditions (7).
- TNYLD—Total nitrogen yield (kg/km
^{2}/yr) for the total drainage area for long-term mean—annual conditions (7). - TPYLD—Total phosphorus yield (kg/km
^{2}/yr) for the total drainage area for long-term mean-annual conditions (7). - TNCONC—Flow-weighted total nitrogen concentration (mg/L) at the reach outlet for long-term mean-annual conditions (7).
- TPCONC—Flow-weighted total phosphorus concentration (mg/L) at the reach outlet for long-term mean-annual conditions (7).
- TNPOINT—Municipal and industrial wastewater contributions to the mean-annual total nitrogen load at the reach outlet (percentage of the mean-annual load) (7).
- TPPOINT—Municipal and industrial wastewater contributions to the mean-annual total phosphorus load at the reach outlet (percentage of the mean-annual load) (7).
- TNFERT—Fertilizer contributions to the mean-annual total nitrogen load at the reach outlet (percentage of the mean-annual load) (7).
- TPFERT—Fertilizer contributions to the mean-annual total phosphorus load at the reach outlet (percentage of the mean-annual load) (7).
- TNATMOS—Atmospheric deposition contributions to the mean-annual total nitrogen load at the reach outlet (percentage of the mean-annual load) (7).
- TNFOREST—Forested land nonpoint contributions to the mean-annual total nitrogen load at the reach outlet (percentage of the mean-annual load) (7).
- TPFOREST—Forested land nonpoint contributions to the mean-annual total phosphorus load at the reach outlet (percentage of the mean-annual load) (7).
- TNBARREN—Barren land nonpoint contributions to the mean—annual total nitrogen load at the reach outlet (percentage of the mean—annual load) (7).
- TPBARREN—Barren land nonpoint contributions to the mean—annual total phosphorus load at the reach outlet (percentage of the mean—annual load) (7).
- TNSHRUB—Shrub land nonpoint contributions to the mean—annual total nitrogen load at the reach outlet (percentage of the mean—annual load) (7).
- TPSHRUB—Shrub land nonpoint contributions to the mean—annual total phosphorus load at the reach outlet (percentage of the mean—annual load) (7).
- TNGRASS—Grass land nonpoint contributions to the mean—annual total nitrogen load at the reach outlet (percentage of the mean—annual load) (7).
- TPGRASS—Grass land nonpoint contributions to the mean—annual total phosphorus load at the reach outlet (percentage of the mean—annual load) (7).
- TNMAN—Animal agriculture contributions to the mean—annual total nitrogen load at the reach outlet (percentage of the mean—annual load) (7).
- TPMAN—Animal agriculture contributions to the mean—annual total phosphorus load at the reach outlet (percentage of the mean—annual load) (7).
- TNDFRAC—Fraction of the mean—annual total nitrogen load delivered to the downstream terminal reach (typically an estuary or inland waterbody) (7).
- TPDFRAC—Fraction of the mean—annual total phosphorus load delivered to the downstream terminal reach (typically an estuary or inland waterbody) (7).
## Appendix References(1) – U.S. Army Corps of Engineers, 1998. (2) –Wetzel and Likens, 1991. (3) – Hutchinson, 1957. (4) – Simley and Carswell, 2009. (5) – Nolan and others, 2002 (6) – Carpenter, 1983 (7) – Schwarz and others, 2006. (8) – Values calculated from datasets (NID, NHD, ERF1_2, and SPARROW) (9) – McJannet and others, 2008. (10) – Noges, 2009. (11) – Kerekes, 1977. |
First posted September 13, 2017 |