AnnAGNPS Users Manual

AnnAGNPS Users Manual for North Dakota

Draft: December 2006

Prepared by: Michael J. Hargiss Environmental Scientist North Dakota Department of Health Division of Water Quality Gold Seal Center, 4th Floor 918 East Divide Avenue Bismarck, ND 58501-1947 And Mohammad Yousaf Khan Graduate Student North Dakota State University Agricultural and Biosystems Engineering 1221 Albrecht Boulevard Fargo, ND 58105

North Dakota Department of Health Division of Water Quality


John Hoeven, Governor Terry Dwelle, M.D., State Health Officer

North Dakota Department of Health Division of Water Quality Gold Seal Center, 4th Floor 918 East Divide Avenue Bismarck, ND 58501-1947 701.328.5210

Table of Contents Table of Contents List of Figures


Draft: December 2006 Page 6 of 76

Outline of AnnAGNPS Procedures

AnnAGNPS Model installation and creating a working directory Input Data Preparation: DEM, Land use and Soil shape files downloading from available resources. Relevant detailed soil data collection from NASIS database (NRCS). Collection of Land cover (crops types) & Land use practices, Fertilizer application from local county extension office or literature review. RUSLE file (Info/ Parameters relates to crops & field operations) collection. Collection of Climate data from local weather station or available web sites. If possible gets aerial photographs or shape file for your study watershed and download stream data from available resources (Its optional). Delineation of Watershed: Input requirement DEM, Processes: creation of watershed boundary and cells, Output: Cell & Reach data. Extraction of Dominant Soil and Land Use IDs. Input requirement : Soil and land Use shape files. Output : Dominant Soil and Land Use IDs in each cell (cell refer to sub watershed) Enter detailed information relevant to each Dominant Soil and Land Use IDs and other required datasets in Input Editor. Run GEM to format Climate data into AnnAGNPS required format. Execute model and generate results



1.0 INSTALLATION PROCEDURES 1.1 Installation procedure of AGNPS 1. Go to website at: http://www.ars.usda.gov/Research/docs.htm?docid=5199

Click Here

Figure 1. Click the icon shown by rectangular callout.

Click Here




Click Save


Figure 4. Save as in your C drive or primary drive and accept default file name.



Figure 5. Locate AGNPS_Complets.Zipfile and extract files in your primary or selected drive, by default all extracted files would save in a folder called AGNPS in your primary or selected drive.

Figure 6. Highlighted Rectangle shows AGNPS folder along with connected folders to it in your C or selected drive.



In order to make a working directory, first we need to extract the zip file from OR_mission_Creek, which is located in C:\AGNPS\Example_AGNPS_Watershed_Studies as shown below.

Figure 7. OR_Mission_Creek zip file within Example_AGNPS_Watershed_Studies folder. Save the extracted files in C drive or primary drive. By default, all extracted files will be saved in a folder called AGNPS_Watershed_Studies and this would be our working directory.

Figure 8. OR_Mission_Creek folder and its sub-foloders.



The rectangle box shows AGNPS_Watershed_Studies folder and OR_Mission_Creek folder including other sub-folders as shown in Figure 8. In order to start a new project, extract AGNPS_Arcview_Interface zip file located in C:\AGNPS\Utility\AGNPS_Arcview_Interface folder and save it in C or primary drive. By default, it will go in AGNPS_Watershed_Studies folder.

Figure 9. AGNPS_Arcview_Interface file.

Working directory

Project directory

OR_Mission_Creek folder

Figure 10. Project directory and OR_Mission_Creek folder both are in working directory (AGNPS_Watershed_Studies).



Before starting the AGNPS interface program rename your AGNPS Arcview Interface folder according to your project (to avoid errors, choose simple and short names, do not use spaces or special characters). If you need to work on another project, extract AGNPS_Arcview_Interface folder as described above and re-name it and save it in the same working directory. Always keep OR_mission_Creek folder and your project folder in your working directory. To start the AGNPS program, click your project folder and then click 4_Arcview_datasets_folder and double click AGNPS.apr file.

3. Click Here

1. Click Here 2. Click Here

Figure 11. The sequential process to start the AGNPS program.



click ok

Figure 12. Accept the default working directory path by clicking ok.

click ok

Figure 13. Click ok to accept the default software path.



Figure 14. Make sure the spatial Analyst extension is checked.



2.0 INPUT DATA 2.1 Input data preparation The primary data required for AnnAGNPS model are: (i) Elevation data (ii) Land use data (iii) Soil data and (iv) Climate data. (i) Elevation data: We can download elevation data for the area of interest in the form of Digital Elevation Model (DEM) from http://seamless.usgs.gov website as shown in figure below:

Figure 15. USGS Seamless Data Distribution Home Page.

Figure 16. Selecting an area to download.

2. Select area of interest

1. Click here to zoom in your areas of interest 3. Click here to select area to be downloaded



4. Click Download

Figure 17. Click download button to download DEM requested. Once you downloaded the DEM, create a folder (e.g DEM folder) in the C:\AGNPS_Watershed_Studies\AGNPS_Arcview_Interface\4Arcview_ Datasets. And save your DEM in newly created folder. (ii) Land use data We can download landuse and *soil* data for the area of interest from http://datagateway.nrcs.usda.gov website as shown in figure below:



1. Click Here

Figure 18. NRCS Data Gateway Website Home Page.

3. Enter State and County Name

2. Click Here

Figure 19. Selecting a State and County Name.



Figure 20. Selecting the desired files from the screen.

4. Select Common Land Units

Figure 21. Select Common Land Units.



We can download the land use data from the above mentioned website for the county that covers the watershed. For the crop rotation, and management practices information consult a Natural Resource Conservation Service (NRCS) District Conservationist or North Dakota State University Extension Agent. (iii) Soil data

Figure 22. View of Soils File to Select. We can use the NRCS Data Gateway website mentioned above to download the spatial and tabular soil data for our study area. However, the tabular soil data is not presented in AnnAGNPS format, in order to get the complete tabular soil data in AnnAGNPS format, we have to request a soil scientist from the Natural Resource Conservation Service to retrieve the soil data in AnnAGNPS format from NASIS database. Refer to for instructions on how to retrieve NASIS soils data go to C:\AGNPS\Utility\AnnAGNPS_Soil_Database_Development. Soils data retrieved from the NASIS database will be in Input Editor Version 3.3 format. Input Editor Version 3.51 is being used in the development of this manual. Therefore soils data must be entered manually. To find instructions on how to enter NASIS soils data into Input Editor 3.51 refer to Appendix.



(iv)Climate data Synthetic Climatic Data If you do not have recorded climate data for your study area you can get the required climate data using GEM climate generator model. The GEM model is incorporated in AnnAGNPS. We can generate multiple years of climate data using the GEM climate generator. How to run GEM and create MonClip.inp file follow the instructions define in GEM_Example.pdf and AGNPS_Climate.PDF files. These files are located at: C:\AGNPS\DataPrep\Weather\GEM\Document. Once you get MonClip.inp file save this file in 6_Editor_Dataset folder located in your working/project folder. Example: C:\AGNPS_Watershed_Studies\AGNPS_Arcview_Interface\6_Editor_DataSets Recorded Climatic Data The AGNPS model accept climatic data in MonClip.inp file format, that require six parameters: Min & Max Temperature, Wind Velocity, dew Point, Precipitation, and sky cover. However you have to save your recorded climatic data (that would be most probably in Excel or Text format) in MonClip.inp format so the AGNPS can use it. In order to do that first run the GEM program and generate the climatic data for the number of years according to your recorded data and once you get the MonClip.inp file, open that file in EXCEL and then paste your recorded data over the GEM generated data ( if you do not have recorded data for any one required parameters then use GEM generated parameter data) and then save it back as MonClip.inp in Word or Notepad. You do not need to import that file to input editor just keep it in folder as mentioned above along with AnnAGNPS.inp file.



3.0 WATERSHED DELINEATION3.1 Working with Digital Elevation Models (DEMs) Bring the downloaded DEM into Arcview window as shown below.

1. Click add theme 3. Select grid file & Click OK

2. Select Grid Data Source

Figure 23. The selection procedure for viewing DEM in Arcview Interface.



Figure 24. View of a DEM in AGNPS/Arcview interface. If you would like to bring more than one DEM, repeat the same procedure. If the watershed is larger than the single DEM, then the merging procedure needs to be performed. Note: If your study watershed cover only one DEM that you do not need to follow the Merging DEMs procedure. Merging DEMs 1. Bring the two DEMs and click both of them to make them active 2. Click DEM Utilities 3. Click Merge Grids Figure 25 4. DEMs are now merged together Figure 26



Click Merge Grids

Figure 25. Click DEM Utilities and then Merge Grids.

Figure 26. A view of the merged DEM.



3.2 Delineation of the watershed 3.2.1 Processing the DEM After placing our DEM in the ArcView Interface next we will want to begin delineating the watershed. First we need to process the DEM this is accomplished by following the procedure below. 1. Click DEM Utilities 2. Click Process DEM

Figure 27. Selecting the Process DEM icon.



3. Accept default numbers or 300 for flat area to initiate the number of cells for the stream threshold. User can experiment with the cell values to get the desired stream delineation result. Lower numbers result in dense stream networks and larger numbers result in sparse stream networks.

Figure 28. Selecting a Stream Threshold.



4. After process DEM you will have files: Outlets, WatshdGrd, LinkGrd, StreamGrd, FlowAcc, FlowDir. Check outlet and streamGrd layers so it would be visible. Figure 29.

Figure 29. Processed DEM with Stream Network.



5. Bring in shape file of your watershed (if it is available) that would be helpful in delineating the watershed correctly (e.g for selection of outlet point). 6. Now you will have a Boundary shape file (for the watershed), streamGrd, and outlet layers Figure 30.

Figure 30. Boundary Shapefile of the Watershed.



3.2.2

Assign Themes

Before executing any step at AGNPS Data Prep menu, make sure to assign all themes (DEM, Soil, and land use file). Figure 31. 1. Go to Select Assign Themes 2. Click drop down menu 3. Select DEM 4. OK 5. Select your DEM from Assign DEM window 6. Repeat the procedure for assigning your soil and land use files 7. Once all the themes have been assigned click Cancel, this will allow you to be able to see the themes you have assigned on currently assign theme window. Figure 32.

Figure 31. Note: Always repeat this procedure whenever you start working on the project again.



Figure 32. 3.2.3 Watershed Delineation

The following instructions are intended for delineating the watershed. All watershed delineation Steps (2-8) can be found under the AGNPS Data Prep icon found on the top of the ArcView Tool Bar. Step 1 Clip DEM is not included in the following instructions. This is a special operation not common to most watershed delineation projects. Further information on how to perform this procedure can be found in Appendix B.



Before delineating your watershed activate your boundary shape file and closely study the streams and outlet points in order to select appropriate outlet point. The selected outlet point should be at the lowest elevation and connected to the stream network that cover the whole watershed area. In the above example, the selected outlet point lies at the lowest elevation and connects to all stream networks that cover the entire watershed. Also make sure to activate your DEM before delineating the watershed.

Selected Outlet Position

Figure 33.



Step 2 Select Watershed Outlet 1. 2. 3. 4. 5. 6. 7. Click AGNPS Data Prep Click Step 2 Select Watershed Outlet Select Interactively Select outlet point Click OK Click on the outlet point Click OK.

Figure 34.



STEP 3 Create TopAGNPS Input Files 1. Click Step 3 Create TopAGNPS Input Files Figure 35 2. Select Full 3 Select No for variable CSA and MSCL values Figure 36

Figure 35.



Figure 36.



STEP 4 Execute TopAGNPS 1. Click Step 4 Execute TopAGNPS 2. Enter 1 if you keep the outlet position same or Enter 0 if you want to change the outlet position. Figure 37 3. Select Yes at Did DEDNEM Execute Correctly? 4. Select Yes at Did RESPRO Execute Correctly? 5. Select Yes at Did RESFRO Execute Correctly?

Figure 37. Step 5 Execute Agflow 1. Click STEP 5 Execute Agflow 2. Select Yes at Did Agflow Execute Correctly?



Step 6 Import TOPAGNPS arc files 1. Click STEP 6 Import TOPAGNPS arc files 2. Enter name for the directory where all your generated files should be saved e.g. Brewer (by default these files will save to the 4_Arcview_Dataset folder). All newly generated files could be seen at the layer menu: Subwats.shp file is the shape file generated by the model. Check subwats.shp file and study the subwatershed sizes and analyze how much accurately the model delineate the boundary for the study watershed. We can use boundary shape file and subwats.shp file to compare the accuracy of the delineated watershed boundary Figure 39. To view detailed cell and reach information read AnnAGNPS_Cell.dat & AnnAGNPS_Recah.dat files; those files are saved at a directory you created at Step-6.

Figure 38. This is the final delineation of your watershed (here you can use aerial photograph or map or your boundary shape file and stream shape file of your study watershed for comparison with the model created boundary (subwat.shp file) and streams (Netw.shp file) if both look similar and there is no large difference continue the next step otherwise redelineate the watershed) if you are not satisfied with the subwatershed or cell sizes then click the Modify Stream Network Generation Parameters option this will allow you



change the sizes of your subwatershed or cells sizes. Instructions for Modify Stream Network Generation Parameters can be found in Appendix C.

Figure 39. Subwats.shp file overlying boundary.shp file.



Step 7 Intersect Cell and Soil data 1. 2. 3. 4. 5. 6. Select Step 7 Intersect Cells with Soils Data Figure 40. Make sure Soil shape file has been assigned Select Musym at Soil Intersection box After processing Click OK Int_Soil.shp file appear in the layer menu This file will identify the dominant soil type ID in each sub watershed.

Figure 40.



Step 8 Intersect Cells with Field data 1. Select Step 8 Intersect Cells with Field Data Figure 41 2. Make sure Land Use shape file has been assigned 3. Select Class_name (Note. If Class_name does not exist then select field that possess Land Use IDs in your Land Use Shape; check at open theme table to view fields) at Field Intersection box 4. After processing Click OK 5. Int_lu_lc.shp file appear in the layer menu 6. This file keeps dominant Land use type ID in each sub watershed.

Figure 41.



4.0 Input EditorThe Input Editor have several data sets but its depend on the study objective, which one need to be used. It allows entering the detailed information for different parameters e.g detailed data associated to each Soil and Land Use IDs existing in each cell of the watershed. If a data for a particular parameter in a data box is not available then leave that box blank, in that situation the model will use default values. Also selection of simulation period and output files format could be done by Input Editor. Note: For detailed Input Data parameter Info read Input_Specification.pdf file located C:\AGNPS\PLModel\Document\User 4.1 Starting a Project in Input Editor 1. Click File 2. Click New AnnAGNPS File

Figure 42.



4.1.1 AnnAGNPS Identifier & Watershed Data (Figure 43) 1. 2. 3. 4. 5. Watershed Name Watershed Description Watershed Location (optional) Latitude and Longitude Click Accept

Figure 43.



4.2 Cell and Reach Data Importing Cell and Reach Data: 1. Click File 2. Click Import 3. Click ArcView 4. Click Cell Data from ArcView 5. Locate ann_cell.csv file; Click Open 6. Cell Data will be imported into the Cell Data Box Figure 45 7. Repeat the same procedure for importing Reach Data. (ann_reach.csv is the file to be imported). Refer to Figure 46 Reach Data imported into Reach Data Box. 8. Click Save at File menu to save AnnAGNPS Input file as AnnAGNPS.inp file and save it in 6_Editor_DataSets folder of your working directory.



Figure 44.

Figure 45. Cell Data imported into the Cell Data Box



Figure 46. Reach Data imported into the Reach Data Box. 4.3 Land use and operation information for Management Field Data Note: Review files in Ref_Data folder that is located C:\AGNPS\Ref_Data, that would give an idea about the reference values required for different Input Editor data boxes. And most of them is going to be discussed in the following steps. 4.3.1 Management Field Data



Figure 47.

1. Make sure that same Management Field ID exists in Cell Data Box (Figure 45) 2. Enter land use Type, depends on your Field ID

3. Enter Management Schedule ID

Figure 48.

4. Click Accept and Go to Management Schedule Data Box and Enter the same Management Schedule ID that Entered at Step 3.



4.3.2 Management Schedule Data



1. same as step 3 5. Enter Management Operation ID associated with crop stages

2. Enter Dates for crop stages, e.g Planting

6. Fertilizer App ID associated with crop stages

3. Enter Crop ID e.g wheat or go to Non Crop ID box, if Mang Schedule ID is for non crop e.g Rangeland

6.Click Next to enter the Event Date, Mang Operation ID and Ferti App ID for crop next stage e.g I. Planting; II. harvesting

4. Enter Curve Number ID associated with crop stages

7. Click Next to enter new management Schedule Data for a second crop

Figure 49. Note: If you have more than one crop for the same Management Schedule ( e.g wheat- corn-soybean) and once you have finished entering information for the first crop. Then click step 7 (Figure 47) and enter second crop name in New Crop ID box and enter all the relevant information as explained above. For Crop or non Crop ID, Curve Number ID, Operation Management ID, and Fertilizer Application ID go to their corresponding data boxes ( e.g crop data box) and make sure the ID entered here must exist and explained there. Repeat the entire procedure (4.3.1 and 4.3.2) for entering information for new management schedule.

4.3.3 Management Operation Data



Uploading Management Operation Data from RUSLE 1. Click Management Operation Data (Figure 50) 2. Click RUSLE (Figure 51) 3. Click here and locate your RUSLE File (Figure 52) 4. Click ADD ALL (Figure 52) 5. Click Accept (Figure 52) 6. Click File, then Save, Save AnnAGNPS.inp file Note: Make sure that the AnnAGNPS.inp file is in the proper project directory before saving. Failing to do so may overwrite other projects input files.

1. Click Management Operation Data

Figure 50.



2. Click RUSLE

Figure 51.

3. Click here and locate your RUSLE File

4. Click ADD ALL 5. Click Accept

Figure 52.



Figure 53.



4.3.4 Crop Data Uploading Crop Data from RUSLE 1. Click Data (A-N) 2. Click Crop Data 3. Click RUSLE (Figure 54) 4. Click here and locate your RUSLE File (Figure 55) 5. Click ADD ALL (Figure 55) 6. Click Accept (Figure 55) 7. Click Accept (Figure 56) 8. Click File, then Save, Save AnnAGNPS.inp file Note: Make sure that the AnnAGNPS.inp file is in the proper project directory before saving. Failing to do so may overwrite other projects input files.

3. Click RUSLE

Figure 54.



4. Click here and locate your RUSLE FILE


Figure 55.

7. Click Accept

Figure 56.



4.3.5 Non Crop Data Uploading Non-Crop Data from RUSLE 1. Click Data (A-N) 2. Click Non-Crop Data 3. Click RUSLE (Figure 57) 4. Click here and locate your RUSLE File (Figure 58) 5. Click ADD ALL (Figure 58) 6. Click Accept (Figure 58) 7. Click Accept (Figure 59) 8. Click File, then Save, Save AnnAGNPS.inp file Note: Make sure that the AnnAGNPS.inp file is in the proper project directory before saving. Failing to do so may overwrite other projects input files.

3. Click RUSLE

Figure 57.



4. Click here and locate your RUSLE FILE


Figure 58.

7. Click Accept

Figure 59.



4.4 Fertilizer Application Data Entering Fertilizer Application Data 1. Click Data (A-N) 2. Click Fertilizer Application Data 3. Enter Fertilizer ID (Example: NH) 4. Enter Fertilizer Name (Example: N) 5. Enter Fertilizer Amount (Example: 150 lbs) 6. Click Insert (To add a new fertilizer) Repeat Steps 1-4 7. Click Accept 8. Click File, then Save, Save AnnAGNPS.inp file Note: Make sure that the AnnAGNPS.inp file is in the proper project directory before saving. Failing to do so may overwrite other projects input files.

3. Enter Fertilizer ID

4. Enter Fertilizer Name

5. Enter Fertilizer Amount

6. Click Insert

7. Click Accept

Figure 61.



4.5 Fertilizer Reference Data Entering Fertilizer Reference Data 1. Click Data (A-N) 2. Click Fertilizer Reference Data 3. Enter Fertilizer Reference ID 4. Enter Fertilizer Inorganic N 5. Enter Fertilizer Organic N 6. Enter Fertilizer Inorganic P 7. Enter Fertilizer Organic P 8. Enter Fertilizer Organic Matter 9. Click Insert 10. Repeat Steps 2-10 for additional Fertilizers 11. Click Accept

Figure 62.



4.6 Output Options For Output Option: that cover files format, cell and reach selection option. If you do not check any option then by default it would give results for all cells and reaches and outlet points.

Figure 63.



4.7 Simulation Period Data The Simulation Period Data box allow to selection the dates and time period for simulation. Enter data only for boxes as shown in Figure 51.

Figure 64.



4.8 Executing the AnnAGNPS Model Once entered all data in Input Editor save it again as AnnAGNPS.inp file. Keep both DayClim.inp (Climate file) and AnnAGNPS.inp file in 6_Editor_DataSets folder. 1. 2. 3. 4. Go to 0_Batch_files folder of your working directory Double Click 7_execute_AnnAGNPS.bat file The output results saved at 7_AnnAGNPS_DataSets folder To interpret output results read the Out_Specification.pdf file that is located at C:\AGNPS\PLModel\Document\User 5. To read error messages go to 7_AnnAGNPS_DataSets folder



Appendix ADownloading Stream Shapefiles.To download stream shapfile go to http://nhdgeo.usgs.gov/viewer.htm

Click Zoom in to find your study area



Click Hydrologic Unit & the check square boxes Click Polygon Extract to select the area & download data.



Appendix BStep 1 Clip DEMStep 1 Clip DEM If the study area does not cover the entire DEM then clip the area of interest of DEM rather than using the entire DEM. It will save processing time and disk space. In order to find the area of interest, bring the shape file of your watershed boundary, it will help you to figure out clipping the study area. To clip the DEM of the study are, perform the following operation. 1. Go to AGNPS Data Prep 2. Step 1 Clip DEM



Appendix CModify Stream Network Generation ParametersThe number of delineated subwatershed or cell depends primarily on two parameters: CSA (Critical Source Area) in hectares, and MSCL (Minimum Source Channel Length) in meters .The CSA is a minimum drainage area that feeds a stream. By default the model uses CSA 8.0 ha and MSCL 130m values for drawing number of subwatesheds. If you are not satisfied with the sizes of your all or particular delineated subwatesheds then you need to change the value of CSA and MSCL. Using or entering lower CSA and MSCL value than default value will give you smaller sizes of subwatersheds or vice versa. How to do Modify Stream Network First Click Select Data set below STEP 6 Make sure the Data set directory assign to the directory/folder where you saved your Import TOPAGNPS arc files. If not direct path toward your folder e.g brewer



Select Modify Stream network Select Yes to modify CSA and MSCL values If you are interested to apply different CSA and MSCL values on your delineated subwatersheds, especially in a situation where you would like to increase the size of few subwatersheds and also decrease size of few subwatershed then you should click YES other wise click NO.

Here we can assign five different CSA and MSCL value. It is important to remember there are no standard or fixed values, therefore it is a matter of trying different values until you get your desired results. The minimum CSA value should not be less than area of ten cell size of your DEM (e.g for 30m DEM, 30m *30m *10= 9000m 2 1 ha) and MSCL value should not be less than the length of your DEM cell (e.g for 30m DEM, length of DEM cell is 30m). Select Full for TOPAGNPS run Select OK for Edit Codes



Selected subwatershed showed in highlighted color Once finish selecting subwatershed click the mouse/arrow outside the green color.



Select the values (1,2,3,4,5) that relates to your entered CSA & MSCL, applied to selected watershed. Select Yes if you would like to continue and select different subwatersheds and apply different CSA & MSCL value. Repeat the same procedures once you done. Go back to STEP 4 to execute TOPAGNPS. And STEP 5 Exectue Agflow. Inorder to get the modified delineated watershed.



Appendix DEntering NASIS Soils Data into Input Editor 3.51The AnnAGNPS soils data retrieved from the NASIS database will be formatted to Input Editor Version 3.3. This version of Input Editor has been recently updated to Version 3.51 and will be used in watershed modeling in North Dakota. Therefore data gathered from the NASIS database will need to be inputted manually into the Input Editor 3.51. Due to the inconsistency of the formatting between the two versions data entry can become time consuming and have geometric potential for errors. The below instructions are intended to provide the user with a road map to navigate the NASIS AnnAGNPS soils data. Let us first look at actual AnnAGNPS soils data retrieved from the NASIS database. The soil data presented below is for one type of soil found in the watershed. The top layer presented in the Pink highlight is general soil information it includes the Soil ID, Hydrological Soils Group, K-Factor, Albedo, Specific Gravity, Soil Name, and Soil Texture. (Note: Every Soil ID will come with a ND prefix and a three digit code before the Soil ID number (Example: ND0414 = Soil ID: 4.) The next three highlighted layers (Yellow, Green, Blue) are the soil layer data. Each layer will contain values specific to that layer and includes the following: Clay Ratio, Silt Ratio, Sand Ratio, Rock Ratio, Very Fine Sand Ratio, CaCO3, Saturated Conductivity, Field Capacity, Wilting Capacity, Volcanic Code, pH, Organic Matter Ratio, Organic N Ratio, Inorganic N Ratio, Organic P Ratio, Inorganic P Ratio, and Soil Structure Code. Note enter only the soil data from NASIS soil that correspond to the soil IDs extracted by the model. In order to find that see review Cell data box.ND0414 GRAIL C 300.0 0.00 6.7 790.0 0.08 7.5 1520.0 0.09 7.9 0.0421 1.43 10.8 0.0817 1.74 7.2 0.0494 1.66 7.2 0.0331 1. clay loam 0.310 0.336 0.335 0.215 N 500. 5. 0.400 0.319 50. 0.315 0.329 50. 0.520 0.248 N .5 0.334 0.205 N .5 0.16 2.65 0.354 500. 0.080 250. 0.351 250. 0.020 500. 0.020 250. 0.020 250. 0.106 0 4 0.039 0 4 0.105 0 4

General Soil Data Layer One: Layer Two: Layer Three:



I. Entering General Soil Information.ND0414 GRAIL C 300.0 0.00 6.7 790.0 0.08 7.5 1520.0 0.09 7.9 0.0421 1.43 10.8 0.0817 1.74 7.2 0.0494 1.66 7.2 0.0331 1. clay loam 0.310 0.336 0.335 0.215 N 500. 5. 0.400 0.319 50. 0.315 0.329 50. 0.520 0.248 N .5 0.334 0.205 N .5 0.16 2.65 0.354 500. 0.080 250. 0.351 250. 0.020 500. 0.020 250. 0.020 250. 0.106 0 4 0.039 0 4 0.105 0 4

1. 2. 3. 4. 5. 6. 7.

Soil ID: 4 Hydrologic Soil Group: C K-Factor: 0.0421 Albedo: 0.16 Specific Gravity: 2.65 Soil Name: GRAIL Soil Texture: clay loam

Refer to Figure A.



1. 2.

3.

7. 5.

4.

6.

Figure A.



II. Enter Soil Layer Depth and Bulk Density. 1. Layer Depth: 300.0 (Figure B) 2. Bulk Density: 1.43 (Figure B) 3. Click Next (Figure B)

1. Layer Depth

2. Bulk Density

3. Click Next

Figure B.



III. Entering Layer DataND0414 GRAIL C 300.0 0.00 6.7 790.0 0.08 7.5 1520.0 0.09 7.9 0.0421 1.43 10.8 0.0817 1.74 7.2 0.0494 1.66 7.2 0.0331 1. clay loam 0.310 0.336 0.335 0.215 N 500. 5. 0.400 0.319 50. 0.315 0.329 50. 0.520 0.248 N .5 0.334 0.205 N .5 0.16 2.65 0.354 500. 0.080 250. 0.351 250. 0.020 500. 0.020 250. 0.020 250. 0.106 0 4 0.039 0 4 0.105 0 4

4. Enter in Layer Data Clay Ratio: 0.310 Silt Ratio: 0.336 Sand Ratio: 0.354 Rock Ratio: 0.020 Very Fine Sand Ratio: 0.106 CaCO3: 0.00 Saturated Conductivity: 10.8 Field Capacity: 0.335 Wilting Capacity: 0.215 Volcanic Code: N pH: 6.7 Organic Matter Ratio: 0.0817 Organic N Ratio: 500.0 Inorganic N Ratio: 5.0 Organic P Ratio: 500.0 Inorganic P Ratio: 500.0 Soil Structure Code: 4 5. Check to make sure all the data is in the appropriate boxes and then Click Previous. (Figure C)



5. Click Previous

Figure C. 6. Click Insert Layer. Note: It is important to remember when inserting a new soil layer the new layer must precede the following layer in numerical order (First layer first, second layer second etc.) this will ensure that the layers will not be mixed around (Second layer first, third layer second etc.). Mixing up soil layer data will not give the correct model output results. (Figure D) 7. Enter Layer Depth and Bulk Density (Figure D) (Example: Layer Depth: 790 and Bulk Density: 1.74) 8. Click Next and repeat Steps 4-8. Continue this procedure for all the soil layers for that soil. (Figure D) 9. When finished with the soil and all soil layers Click Accept. (Figure D)



6. Click Insert Layer

7. Enter Layer Depth and Bulk Density

8. Click Next

9. Click Accept

Figure D. 10. Click File, then Click Save As, then Save AnnAGNPS input file as: AnnAGNPS.inp Note: It is recommended to save the file after every soil entry this will save time on the project if an error in entering data occurs. 11. Enter back into your Soil Data then Click Insert Soil and repeat the process for each soil and soil layer in your watershed.



Appendix EHow to display Spatial Distribution or Critical Cells for the Pollutants Load Using ArcGIS 9.1.Procedure finding Critical Cells 1. Bring in Subwat.shp file, AANY.dbf, and AAPY.dbf files into ArcGIS. 2. Now Join the subwat.shp properties table, and AANP.dbf. 3. Right Click on subwat.shp file and select JOINS AND RELATES then select JOINS.



4. In the JOIN DATA dialogue screen, 1. choose Cell ID as your Field, 2. choose AANP as your table, 3. choose also Cell ID and click OK.



5. Right Click on Subwat.shp file and select Properties. On Layer Properties dialogue box click Symbology. 1) Value select AANY.TOT_N file from drop down box. 2) Normalization select PERCENT OF TOTAL (if it is your objective otherwise select option according to your requirement from the drop down box). 3) Classes select the number you wish to make for your data or according to your objective. 4) Click Classify to select different option for classify your data. Click OK to get your desire results.

4.

1.

2.

3.



6. Repeat the same procedure for displaying the spatial distribution of other parameters.



Appendix FTrouble ShootingI. The Watershed Boundary is outside the DEM. Make sure that your pre processed watershed boundary does not touch the edges of your DEM, it must be inside your DEM. Below is the example of an incorrectly delineated pre processed watershed. In such situation you need to re-delineate your watershed by selecting another outlet point. If you do not find another outlet point at your desire location then change the number for your stream delineation (in order to do that go back to Step 2).



II. Error Message when trying to perform Step 7 Intersect Cells with Soils Data

If you get this error: 1. Go to click Select Data Set below step-6 2. Click No at Data Set directory box 3. Locate the directory where you saved your arc-files (At Step-6) and select any file.

AnnAGNPS Users Manual

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