AGNPS Version 5.00 Input File (*.DAT) Format Guide The data file values arThe e kept in a column format. There is some indenting and section names to allow for easier editing and reading of the data file. I. FILE HEADER ====================================================================================================================================================== The header file is found at the top of the file and it consists of 6 lines. LINE VAR NAME DESCRIPTION FORMAT UNITS RANGE LOCATION LINE 1 1. Version Identification Version number of the data file A27 --- "AGNPS SCS-TR55 format 5.00" LINE 2 1. Error log flag Write Error Log output file flag? I8 --- 0 = no output 1 = output file 2. Source Accounting flag Write Source Acctg binary file flag? I8 --- 0 = no output 1 = output file 3. Hydrology file flag Write Hydrology binary file flag? I8 --- 0 = no output 1 = output file 4. Sediment file flag Write Sediment binary file flag? I8 --- 0 = no output 1 = output file 5. Nutrient file flag Write Nutrient binary file flag? I8 --- 0 = no output 1 = output file 6. Pesticide file flag Write Pesticide binary file flag? I8 --- 0 = no output 1 = output file LINE 3 1. Watershed name The name of the watershed A30 --- --- initial data LINE 4 1. Description Watershed Description A30 --- --- initial data LINE 5 1. Base cell area Base area for all cells in watershed F16.2 acres 0.01 - 1000 initial data 2. Number base cells Number of base cells I8 number 1 - 30,000 (?) initial data 3. Number of columns Total number of cells in watershed I8 number 1 - 30,000 (?) initial data including divided cells 4. Hydrology Calculation Method of peak flow calculation I8 --- 0 - 1 initial data Indicator 0 = TR55 1 = CREAMS 5. Geomorphic Indicator Geomorphic calculation indicator I8 --- 0 - 1 initial data 0 = Non-Geomorphic 1 = use Geomorphic 6. k coefficient Indicator for which way to calculate I8 --- 0 or 1 initial data the peak of the hydrograph 0 = calc. using prepeak fraction 1 = calc. using the k-coef 7. k coef value or prepeak % if k coef = 1 this is the k coef value F8.2 k coef --- initial data if k coef = 0 this is the prepeak % % (See k coef above) LINE 6 1. Storm Type SCS Storm Type A16 --- 1 - 3,I,Ia,II,III initial data 2. Storm energy intensity Energy Intensity value for the storm F8.2 --- 0 - 999 initial data 3. Storm duration Duration of storm rainfall F8.1 hours 0 - 999 initial data 4. Storm rainfall Amount of rainfall during storm F8.2 inches 0.1 - 999 initial data 5. Rainfall nitrogen Nitrogen concentration in rainfall F8.2 ppm 0 - 10 initial data II. REQUIRED CELL INFORMATION ====================================================================================================================================================== The following data is produced for each cell. The second and third lines are all indented 8 spaces. This is done so that the cell number sticks out on each line making it easy to locate the beginning of each cell. LINE VAR NAME DESCRIPTION FORMAT UNITS RANGE LOCATION LINE 1 1. Cell number Base cell number I8 --- 1 - 30,000 (?) column data 2. Cell division Cell division number I8 --- 0 - 444 column data 3. Receiving cell number Receiving cell base number I8 --- 1 - 30,000 (?) column data 4. Receiving cell division Receiving cell division number I8 --- 0 - 444 column data 5. Flow direction Direction receiving cell is from I8 --- 0 - 8 column data current cell 0 = Sink Hole Cell 1 = North direction 2 = NorthEast direction 3 = East 4 = SouthEast 5 = South 6 = SouthWest 7 = West 8 = NorthWest 6. Curve number SCS curve number for the cell F8.2 --- 0 - 100 management 7. Average land slope Average slope of the land in the cell F8.1 % 0 - 99.9 slope data 8. Slope shape code Land slope shape code I8 --- 1 - 3 slope data 1 = uniform 2 = convex slope 3 = concave slope LINE 2 1. Slope length Overland slope length I16 feet 0 - 999 slope data 2. Overland Mannings Overland mannings roughness coeff. F8.3 --- 0.001 - 0.990 column data 3. Soil erodibility Factor Soil erodibility factor (K-factor) F8.2 --- 0 - 0.99 soil data 4. Cropping factor Cropping factor (C-factor) F8.4 --- 0.0 - 1.0 management 5. Practice factor Practice factor (P-factor) F8.2 --- 0 - 1.00 management 6. Surface condition constant Surface condition constant F8.2 --- 0 - 1.00 management 7. COD factor Chemical oxygen demand factor I8 mg/l 0 - 170 management LINE 3 1. Soil type Soil type reference code I16 --- 0 - 4 soil data 0 = water 1 = sand 2 = silt 3 = clay 4 = peat 2. Fertilizer level Level of fertilizer applied I8 --- 0 - 4 0 = No Application 1 = Low 2 = Average 3 = High 4 = User supplied amounts 3. Pesticide type Type of the pesticide applied I8 --- 0 - 6 0 = None 1 = Herbicide 2 = Insecticide 3 = Fungicide 4 = Nematicide 5 = Plant Growth Regulator 6 = Dessicant or Defoliant 4. Number of point sources Total number of point sources, both I8 --- 0 - 9 column data feedlots and nonfeedlots 5. # of Additional Erosion Number of Additional erosion sources I8 --- 0 - 99 sources Sources within the cell 6. Number of impoundments Number of impoundments within the cell I8 --- 0 - 13 column data 7. Type of channel Channel Indicator I8 --- 0 - 8 channel data 0 = water cell 1 = no definitive channel 2 = drainage ditch 3 = road ditch 4 = grass waterway 5 = ephemeral stream 6 = intermittent stream 7 = perennial stream 8 = other type of channel The following sections contain detailed information for each cell based on the values that are in line 3 of the Cell data. Each section begins with a section header describing the type of data. NOTE: The channel information will exist for every cell in the watershed! III. OPTIONAL SOIL INFORMATION ===================================================================================================================================================== There are two lines of soil information. This optional soil line is included for all of the soil types, except water. In a water cell, we assume that all the values are zero. Note that the word "Soil:" precedes the first line. This is to help the user in editing and reading the data file. LINE VAR NAME DESCRIPTION FORMAT UNITS RANGE LOCATION LINE 1: 1. Soil Section Header Descriptor Header of Soil data A8 --- "Soil:" 2. Base soil Nitrogen Nitrogen present in the soil F8.4 lb N/lb soil Soil Data 3. Base soil Phosphorus Phosphorus present in the soil F8.4 lb P/lb soil Soil Data 4. Pore Nitrogen Nitrogen present in soil pores F8.2 ppm Soil Data 5. Pore Phosphorus Phosphorus present in soil pores F8.2 ppm Soil Data LINE 2: 1. Extraction runoff N Nitrogen that is extracted into runoff F16.3 --- Soil Data 2. Extraction runoff P Phosphorus extracted into runoff F8.3 --- Soil Data 3. Extraction leaching N Nitrogen that is leached into soil F8.3 --- Soil Data 4. Extraction leaching P Phosphorus that is leached into soil F8.3 --- Soil Data 5. % Organic Matter in Soil % organic matter remaining in the soil I8 % 0 - 100 IV. OPTIONAL FERTILIZER INFORMATION ====================================================================================================================================================== The fertilizer line is optional depending if the user has applied fertilizer to this cell. This is indicated by either a zero or a one for the fertilizer indicator in line 3 of the cell data. A zero means no fertilizer was applied and a 1 indicates that fertilizer was applied in the cell. LINE 1: 1. Fertilizer Section Header Descriptive header of Fertilizer data A8 --- "Fert:" 2. Nitrogen application rate Rate of nitrogen application I8 lbs/acre Mgmt Data 3. Phosphorus application rate Rate of phosphorus application I8 lbs/acre Mgmt Data 4. N Availability factor Available Nitrogen in top half inch I8 % 0 - 100 Mgmt Data of the soil 5. P Availability factor Available Phosphorus in top half inch I8 % 0 - 100 Mgmt Data of the soil V. OPTIONAL PESTICIDE INFORMATION ====================================================================================================================================================== The pesticide data is optional depending if the user has applied a pesticide to this cell. LINE VAR NAME DESCRIPTION FORMAT UNITS RANGE LOCATION LINE 1: 1. Pesticide Section Header Descriptive header of Pesticide data A8 --- "Pest:" 2. Pesticide Common Name Common name of the pesticide applied A30 --- 3. Pesticide Trade Name Trade name of the pesticide applied A25 --- LINE 2: 1. Time of application Time of application I16 --- 1 - 3 1 = Preplant 2 = Preemergence 3 = Postemergence 2. Time since application Time since the pesticide was applied F8.1 Days 3. Application rate Rate of pesticide application F8.2 lbs/acre 4. Application efficiency Efficiency of application I8 % 5. Canopy cover Canopy cover of cell I8 % LINE 3 1. Initial soil residue Amount of pesticide on the soil F16.2 lbs/acre surface prior to the event 2. Soil residue half life Pesticide half Life on residue F8.1 Days 3. Incorporation depth Depth of incorporation into soil F8.2 inches 4. Incorporation efficiency Efficiency of incorporation into soil I8 % 0 - 100+ ** can be > 100% 5. Solubility in water Pesticide solubility in water F12.3 ppm 6. Organic carbon sorption Organic Carbon Sorption Rate (KOC) F12.3 LINE 4 1. Initial foliar residue Amount of pesticide on the soil F16.2 lbs/acre surface prior to the the event 2. Foliar washoff threshold Amount of precipitation required F8.2 inches before the pesticide starts to wash off 3. Foliar washoff fraction Fraction of the pesticide that will I8 % 0 - 100 wash off 4. Foliar residue half life Pesticide half life on foliage F8.1 Days VI. OPTIONAL NON-FEEDLOT INFORMATION ====================================================================================================================================================== The non-feedlot data exists only if point sources exist and at least one of the point sources is a non-feedlot. To determine which type of point source, the AGNPS program reads the point source section header found on the first line of each type of point source data. A total of 9 point sources (non-feedlot and feedlot) is allowed per cell. LINE VAR NAME DESCRIPTION FORMAT UNITS RANGE LOCATION LINE 1: 1. NonFeedlot Section Header Descriptive header for NonFeedlot data A8 --- "NonFdlt:" 2. Water discharge Discharge from the point source F8.3 cfs 3. Total Nitrogen Nitrogen discharge from the pt source F8.2 ppm 4. Total Phosphorus Phosphorus discharge from pt source F8.2 ppm 5. Total COD COD discharge from the point source F8.2 ppm 6. Location of point source Location of point source in the cell: I8 --- 0 - 1 1 = top 0 = bottom VII. OPTIONAL FEEDLOT INFORMATION ====================================================================================================================================================== LINE 1: 1. Feedlot Section Header Descriptive header of Feedlot data A8 --- "Feedlot:" 2. Feedlot area Area of the feedlot F8.2 acres 3. Feedlot curve number Curve number of the feedlot F8.2 --- 0 - 100 4. Roofed area Roofed area of the feedlot F8.2 acres 5. Feedlot Nitrogen Nitrogen concentration in the feedlot I8 ppm 6. Feedlot Phosphorus Phosphorus conc. in the feedlot I8 ppm 7. Feedlot COD COD concentration in the feedlot I8 ppm LINE 2 1. AGNPS buffer calc. ind. Buffer calculation indicator I16 --- 0 - 1 0 = user enters buffer reduction values 1 = use AGNPS buffer calculations If the user selects to enter their own buffer reduction numbers, they must fill in the values for the following variables. If the user wants AGNPS to calculate these values, then the following values are left as zeroes and the AGNPS model calculates the correct values. 2. Decrease N overland Decrease in Nit. due to overland flow F8.1 % 3. Decrease P overland Decrease in Phos. due to overland flow F8.1 % 4. Decrease COD overland Decrease in COD due to overland flow F8.1 % 5. Decrease N grass Decrease in Nit. due to flow through F8.1 % grass buffer strip. 6. Decrease P grass Decrease in Phos. due to flow through F8.1 % grass buffer strip. 7. Decrease COD grass Decrease in COD due to flow through F8.1 % grass buffer strip. The following line of data is repeated for each of the feedlot's Area 2 and Area 3's six subareas. The subareas are used to represent variable characteristics within Area 2 and Area 3. It is NOT required to use all 6 subareas. LINES 3-8: ( "i" represents the subarea 1 - 6 ) 1. Area 2i's area Area of tributary 2i F16.2 acres 2. Area 2i's curve number Curve number of tributary 2i F8.2 --- 0 - 100 3. Area 3i's area Area 3i adjacent to the animal feedlot F8.2 acres 4. Area 3i's curve number Curve number of area 3i I8 --- 0 - 100 The following line of data is repeated for each of the 3 buffer areas in the feedlot. LINES 9-11: ( "i" represents the buffer number 1 - 3 ) 1. Buffer i slope Slope of the buffer area F16.2 % 0 - 100+ 2. Buffer surface constant Surface Condition Constant of buffer i F8.2 --- 0.0 - 1.0 3. Buffer flow length Flow length of buffer i I8 feet The following line of data is repeated for each type of animal in the feedlot (only 3 animal types are allowed). LINES 12-14: ( "i" represents animal type 1, 2 or 3 ) 1. Number of type i animals Number of type i animals in the feedlot I16 2. COD factor COD factor of type i animals F8.2 3. Animal Phosphorus Phosphorus of type i animals F8.2 4. Animal Nitrogen Nitrogen of type i animals F8.2VIII. OPTIONAL GULLY INFORMATION ====================================================================================================================================================== The gully information is repeated for each Addtional Erosion Source in the cell. LINE VAR NAME DESCRIPTION FORMAT UNITS RANGE LOCATION LINE 1: 1. Add'l Erosion Section Header Descriptive header of Gully data A8 --- "Gully:" 2. Type of Add'l Erosion Type of Additional Erosion indicator I8 --- 1 - 4 1 = Gully Source 2 = Construction 3 = River Bank 4 = Other - User supplied name 3. Amount of erosion Amount of erosion from the source I8 tons 4. Gully Soil Texture The soil type of the gully soil I8 --- 1 - 4 (same types as for the surface soil) 5. Gully Soil Nitrogen Amount of base nitrogen in gully soil F8.4 6. Gully Soil Phosphorus Amount of phosphorus in gully soil F8.4 7. "Other" Erosion Name User Supplied description of Erosion A21 ** exists ONLY if Type of Additional Erosion = 4!!! ** NOTE: a single space precedes the name in order to separate the name from the Amount of Phosphorus! IX. OPTIONAL IMPOUNDMENT INFORMATION ====================================================================================================================================================== The impoundment data is repeated for each impoundment in the cell. A maximum of 13 impoundments is allowed per cell. LINE 1: 1. Impoundment Section Header Descriptive header of Impounment data A8 --- "Impound:" 2. Drainage Area Impoundment drainage area F8.1 acres must be <= cell size!!! 3. Pipe diameter Impoundment pipe diameter I8 inches 1 - 99 4. Infiltration rate Impoundment infiltration rate F8.2 in/hr X. CHANNEL INFORMATION ====================================================================================================================================================== The channel data exists for each cell, even if the cell is a water cell. LINE VAR NAME DESCRIPTION FORMAT UNITS RANGE LOCATION LINE 1: 1. Channel Section Header Descriptive header of Channel data A8 --- "Channel:" 2. Channel width Channel width F8.2 feet 3. Channel width coef. Geomorphic width coefficient F8.4 4. Channel width exp. Geomorphic width exponent F8.4 5. Channel depth Channel depth F8.2 feet 6. Channel depth coef Geomorphic depth coefficient F8.4 7. Channel depth exp. Geomorphic depth exponent F8.4 LINE 2 1. Channel length Channel Length in the cell F16.2 feet 2. Channel length coef. Geomorphic length coefficient F8.3 3. Channel length exp. Geomorphic length exponent F8.4 4. Channel slope Channel slope F8.2 % 0 - 100+ 5. Channel side slope Channel side slope F8.2 % 0 - 100+ LINE 3 1. Channel Mannings Coef. Channel Mannings Coefficient F16.3 --- 0.001 - 0.990 2. AGNPS decay indicator Channel flow decay indicator I8 --- 0 - 1 ( 0 = user supplied 1 = AGNPS ) 3. Percent nitrogen decay % nitrogen decay from channel flow I8 % 0 - 100 4. Percent phosphorus decay % phosphorus decay from channel flow I8 % 0 - 100 5. Percent COD decay % COD decay from channel flow I8 % 0 - 100 LINE 4 1. Clay scouring indicator Scour clay particles from channel I16 --- 0 - 1 ( 0 = No Scouring, 1 = Scouring ) 2. Silt scouring indicator Scour silt particles from channel I8 --- 0 - 1 ( 0 = No Scouring, 1 = Scouring ) 3. Small Agg. scouring ind. Scour small aggregates from the channel I8 --- 0 - 1 ( 0 = No Scouring, 1 = Scouring ) 4. Large Agg. scouring ind. Scour large aggregates from the channel I8 --- 0 - 1 ( 0 = No Scouring, 1 = Scouring ) 5. Sand scouring Indicator Scour sand from the channel I8 --- 0 - 1 ( 0 = No Scouring, 1 = Scouring )