USDANRCS WinTR20

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USDA-NRCS WinTR-20

• Hydrology Model Basic Tutorial

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• This tutorial demonstrates the new WinTR-20
  model. Using a simple example, you will learn
  how to
• Create an Input File
• Run WinTR-20
• View Output

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Example Problem

• 3 Sub-areas
• - Sub-area 1 contains a floodwater retarding
  structure.
• Storm Analysis
• - Determine peak flows for 5- and 100-year,
  24-hour rainfalls. Assume the site is located in
  a Type II Rainfall Distribution area.

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WinTR-20 Sub-area / Reach Concepts

• Stream Reaches represent the main flow paths
  that the hydrographs are routed through. They
  can accommodate one of two forms of routing
  Storage Routing (lakes, dams, wetlands, etc.) or
  Reach Routing (stream or river channels).
• All WinTR-20 modeled watersheds end with the
  final stream reach terminating at an Outlet.

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WinTR-20 Sub-area / Reach Concepts

• WinTR-20 represents the watershed as a system of
  sub-areas and reaches.
• Sub-areas are the separate individual drainage
  areas that generate the hydrographs that feed
  into the upstream end of a stream reach.

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Schematic For Example Problem
Reach 2
Sub-area 2
Outlet
(Reach Routing)
Sub-area 3
Reach 1
(Storage Routing)
Legend
Sub-area 1
Storage Structure
Sub-Area Inflow Points
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Data Sources

• The data presented in the next 5 slides have been
  gathered prior to inputting into WinTR-20.
• The data include
• Sub-area Watershed Characteristics
• Stream Reach Hydraulics
• Storage Structure Hydraulics
• Evaluation Storm Amounts and Distribution

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Sub-area Parameters
9
Reach Parameters
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Reach 1 Structure Data

• Example problem assumes pool is empty (EL 2423.0)
  when storm begins.

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Reach 2 Rating Table

• Data derived from HECRAS, Mannings, etc.
• Reach Length 5400 feet, Bankfull Elevation
  2422.5

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Storm Data

• 5-Year 24-hour Rainfall Amount 3.7
• 100-year 24-hour Rainfall Amount 6.2
• Use Type II 24-hour Rainfall Distribution
  (built-in to WinTR20)

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Getting Started - The Initial WinTR-20 Editor
Screen

• Using Windows Explorer, go to the WinTR-20
  Executables directory and click on
• The following WinTR-20 System Controller/ Editor
  Screen comes up

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Getting Started - The Initial WinTR-20 Editor
Screen

• Start --gtAll Programs --gtEngineering
  Applications -gtWinTR-20 version 1.11.11
  --gtWinTR-20
• The following WinTR-20 System Controller/ Editor
  Screen comes up

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WinTR-20 Controller / Editor Screen

• Click on the File menu
• From the drop down menu, select New WinTR-20
  File

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WinTR-20 Identifier Window

• The next screen to appear is the WinTR-20
  Identifier Window.
• Enter the units to use (English or Metric),
  Minimum Hydrograph Value (when to begin and end
  display of hydrograph) and a watershed
  description.
• Accept Changes then Close is selected to
  complete this record.

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Input Data Main Menu

• The screen at right comes up next. Select data
  type to be input here.
• This example will require data describing
• Sub-area
• Stream reach
• Structure rating
• Stream Cross Section
• Storm Analysis
• Start this example by clicking on Sub-Area

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Sub-area Parameters
19
Entering Sub-Area Data

• Enter data as shown for all three Sub-Areas.
• Sub-Area and Sub-Area Reach Identifier are user
  defined alpha-numeric names.
• Sub-Area Reach Identifier refers to the Reach
  that will receive the Sub-Areas hydrograph.

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Entering Sub-Area Data

• If a built-in rainfall distribution is being used
  for the whole watershed, Rain Gage Identifier
  is left blank
• Note output being requested for this Sub-Area
  peak flow and hydrograph

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Entering Sub-Area Data (continued)

• After data for Area 1 has been entered, simply
  highlight the box containing Area 1 then type
  Area 2. Begin entering Area 2s data. Repeat
  for Area 3. Click Accept Changes (Close)
  button when finished.

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Getting Help

• To get help at any time on input parameters,
  simply click on the yellow text for that input.
• A screen then appears with a description of the
  parameter.
• To close the help window, click on the input text
  line again.

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Entering Stream Reach Data

• After all the sub-area data has been entered and
  accepted, the user is returned to the main input
  editor menu.
• Next, click on Stream Reach to enter reach
  data.

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Reach Parameters
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Stream Reach Data

• Use pull down menu to select the stream reach
  needing input.
• The names that will appear in this pull down menu
  were defined during the Sub-Area data entry
  section (Sub-Area Reach Identifier).

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Stream Reach 1 Data

• Reach 2 is the receiving reach for Reach 1.
• Reach 1 is a structure-type routing. The
  structure rating data (entered later) will be
  identified as Struct 1.
• Since this is a structure routing, no channel or
  valley lengths are used.

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Stream Reach 2 Data

• Outlet (end of the watershed) is the receiving
  reach for Reach 2.
• Reach 2 is a channel-type routing. The channel
  rating data (entered later) will be identified as
  Xsec 2.
• Channel and valley lengths are the same in this
  example. No baseflow is assumed for this reach.

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Entering Structure Data

• After the stream reach data has been entered and
  accepted, the user is returned to the main input
  editor menu.
• Next, click on Structure Rating to enter
  structure data.

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Reach 1 Structure Data

• Example problem assumes pool is empty (EL 2423.0)
  when storm begins.

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Entering Structure Data

• From the pull-down menu Struct 1 is selected.

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Entering Structure Data

• Enter data one line at time using the structure
  elevation, discharge and storage entry cells on
  the left.
• Leave Starting Elevation blank. This has
  WinTR-20 start the routing at the lowest
  elevation in the rating table.
• Click on Accept Changes (Close) button when
  finished.

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Entering Structure Data

• The user can click on Display Data button for a
  graphical view of the data just input.

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Entering Stream Cross Section Data

• After the structure rating data has been entered
  and accepted, the user is returned to the main
  input editor menu.
• Next, click on Stream Cross Section to enter
  stream cross section data.

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Reach 2 Rating Table

• Data derived from HECRAS, Mannings, etc.
• Reach Length 5400 feet, Bankfull Elevation
  2422.5

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Entering Stream Cross Section Data

• On the pull down menu, Xsec 2 is selected.

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Entering Stream Cross Section Data

• Entered the required data.
• Cross Section Data entry is similar to the
  Structure Data - Use entry cells to the left and
  enter data one line at a time.
• Click on Accept Changes (Close) button when
  done.

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Entering Stream Cross Section Data

• The user can click on Display Data button for a
  graphical view of the data just input.

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Entering Stream Cross Section Data

• Notes on Cross Section Data
• Data usually prepared ahead of time using water
  surface profile programs such as HECRAS.
• Bankfull Elevation represents the point at
  which flow transitions from channel to
  floodplain.
• Low ground may be left blank.
• Stream Identifier and Stream Station may be left
  blank (used only for NRCS Economic Analysis)

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Entering Storm Data

• After the Cross Section data has been accepted
  and closed, the user is returned to the main
  input editor menu.
• Select Storm Analysis to enter rainfall amounts
  and distribution.

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Storm Data

• 5-Year 24-hour Rainfall Amount 3.7
• 100-year 24-hour Rainfall Amount 6.2
• Use Type II 24-hour Rainfall Distribution
  (built-in to WinTR20)

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Entering Storm Data

• Enter the 5- and 100-year rainfall amounts,
  distribution type, and Antecedent Runoff
  Condition (ARC - Default is 2).
• The Storm Identifier can be any alpha-numeric
  string.
• The screen to the right shows the user selecting
  the Type II Rainfall Distribution from the
  pull-down menu.

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Entering Storm Data (continued)

• The screen to the right shows the Storm
  Analysis window after data has been entered for
  both events.
• The data entry is completed by clicking Accept
  Changes (Close) button.

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Entering Storm Data (continued)

• Storm Analysis Input Notes
• Rain Gage Identifier is not required if
  WinTR-20 is executed using the same rainfall
  amount and distribution over the entire
  watershed.
• 2-Yr 24-Hr Rainfall is not required unless the
  Time of Concentration computation option for any
  Sub-Area is used.

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Selecting Global Output

• Instead of requesting individual output options
  within each sub-area and stream reach, the user
  can use the Global Output from the main menu.

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Global Output (continued)

• Global Output allows the user to select the same
  output for ALL sub-areas and stream reaches at
  once.
• For this example, hydrographs and peak discharge
  information will be output for all points in the
  watershed.

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Saving Input File

• After accepting the Storm Analysis data, the user
  is returned to the WinTR-20 Input Editor Main
  Menu.
• From the File menu, select Save As to give a
  file name and saving location.

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Checking Data Prior to Running WinTR-20

• Prior to running WinTR-20, it is useful to view
  the watershed Schematic.
• Under the View drop down menu on the
  Controller/ Editor screen, click on Schematic.

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Checking Data Prior to Running WinTR-20

• The Schematic shows how the sub-areas and reaches
  are configured.
• The Legend and Labels under the View
  options are turned on.

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Running WinTR-20

• After the file has been saved, the Run option
  will show in menu bar at the top.
• To run the program, simply click on the Run.

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WinTR-20 Output- Printed Page File

• Following a successful run, the WinTR-20 Printed
  Page File screen comes up.
• For this example, peak discharge and hydrographs
  were requested for all sub-areas and stream
  reaches.
• Output can be sent to the printer or to a file
  from this screen.

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WinTR-20 Output- Printed Page File

• To simplify the output, the hydrograph option
  is removed from each sub-area and reach and the
  model is then re-run.
• The screen to the right shows the simplified
  output from this second run.

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WinTR-20 Output - Plots

• WinTR-20 also has graphical output capabilities.
• Following a successful run, the Plots option
  can be selected ...

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WinTR-20 Output - Plots

• In this example, the Hydrograph for Area 2
  100-year is requested.
• Note Hydrograph plots are only available if
  Hydrograph Output has been selected within the
  individual sub-area/stream reach or as a Global
  Output.

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WinTR-20 Output - Plots

• The graphic shown to the right comes up after
  Display is clicked.
• Options include printing, copying, and zooming in
  and out.

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WinTR-20 Output - Plots (continued)

• To plot two items on the same graph, select an
  option (Multiple Storms, Alternate or Location)
  under Multiple Hydrographs
• For this example (multiple location), a plot of
  the hydrograph into and out of the storage
  structure (Reach 1) for the 5-year event is
  selected.

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WinTR-20 Output - Plots (continued)

• The resulting multiple plot is shown below

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Some Important Considerations

• Each time a change is made to the input data, the
  file must be saved before the Run option is
  presented.
• When bringing in an existing file, select No
  Changes (Close) to get the Run option to
  appear.
• All data input require a positive entry (i.e.
  carriage return, tab, or mouse click) to be
  recognized.

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WinTR-20 Support Team
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WinTR20 Web Site

• For downloading the latest version of WinTR-20,
  at the following website
• http//www.wsi.nrcs.usda.gov/products/W2Q/HH/Tool
  s_Models/WinTR20.html
• This web page also has information on
• Update notes
• WinTR-20 Manual Download
• Training Materials
• email address for the WinTR-20 Support Team

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Converting Old TR-20 Input Files to New WinTR-20
Format
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WinTR-20 Data Converter
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WinTR-20 Data Converter

• The data converter subprogram is within the new
  WinTR-20 editor.
• Convert most items in the old TR-20 input data
  set (Version dated 1983 and later).
• The data can be run in the present WinTR-20
  format.

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WinTR-20 Data Converter

• Some features in the old TR-20 program are not
  used in the New WinTR-20 and will not translate.
• These features will be ignored during the
  conversion
• - Runoff Option in Rainfall Distribution Table
• - IPEAKS (intermediate peak output)
• - Multiple time increments (new WinTR-20 will
• take care of this automatically).

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Output Option Considerations

• The output options used in the Old TR-20 input
  files do not translate over the new version.
• The user will have to re-establish the output
  parameters in the new data file
• - Global Output
• - Sub-Area or Reach record

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Reach Routing Considerations

• Reach routing has been revised in the new
  program, the user will have to input additional
  data.
• The routine in the new WinTR-20 (Muskingum-Cunge)
  requires
• - Elevation
• - Discharge
• - End Area
• - Top Width
• - Friction Slope
• tables for ALL reach routing

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WinTR-20 Converter Reach Routing Considerations

• There is no provision for parametric routing
  (i.e. the X and m option with the old TR-20
  ATT-KIN method) in the new version.
• Any reach section using X and m in the Old
  data will have to have a complete reach routing
  table developed (Elevation, Discharge, End Area,
  Top Width, and EG Slope).

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Reach Routing Considerations

• If Old TR-20 data set had XSECTN tables
• - Converter program will calculate a top
• top width from the old TR-20 XSECTN
• table data.
• - User only have to add the friction slope to
• the rating table.

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WinTR-20 ConverterExample

• Double click on WinTR-20 icon.
• WinTR-20 System Controller / Editor Window will
  pop up.
• Click on Convert old Data from the File pull
  down menu.

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WinTR-20 Converter Example
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WinTR-20 ConverterExample

• After Old TR-20 data file selected and converted
  WinTR-20 Identifier window will appears.
• You may make the change to
• - Min. Hydrograph Values
• - Watershed Description
• Click button to close this
  window.

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WinTR-20 ConverterExample

• WinTR-20 System Controller / Editor Window will
  appears.
• Select Stream Cross Section to add the missing
  Friction Slope.

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WinTR-20 ConverterExample

• Select Stream Cross Section from pull down
  menu.
• Cross Section data will appears.
• Top Width values calculated automatically
  from old TR-20 data.

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WinTR-20 ConverterExample (continued)

• To enter the missing Friction Slope
• - Click on the line from the table
• - Data will be appears
• - Enter Friction Slope
• Click on Display Data button to view Cross
  Section plot.
• Click on button to close this
  window.

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WinTR-20 ConverterProgram

• Prompt you back to the Main Window.
• Peak Output and Hydrograph Output for Sub-Area
  and Reach click on Global Output.
• Global Output Window will appears.

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WinTR-20 Converter

• Enter Hydrograph Print Precision
• Enter Minimum Hydrograph Display Flow
• Enter Print Time Increment
• For Peak Output and Hydrograph Output for
  Sub-Area and Reach check Yes
• Click on button to close this
  window.

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WinTR-20 Converter

• Save new WinTR-20 data select SaveAs from the
  File drop down menu.
• Give a new file name with .inp extension.
• Click Save to continue.

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WinTR-20 Converter

• To view the schematic - select Schematic from
  the View drop down menu.
• If the schematic looks OKAY! exist the
  schematic window.

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WinTR-20 Converter

• To view the Input File - select Input File from
  the View drop down menu.
• Click Close button to exist this window.

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WinTR-20 ConverterExample

• To perform the calculation select Run from
  the main menu.
• After a successful run the WinTR-20 Printed
  Page File will appears.
• You are Done!

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Program to Convert HEC-RAS Output to WinTR-20
Cross Section
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Program to convert HEC-RAS output into WinTR-20
Cross Section

• Program is incorporated into Windows interface
• Reads HEC-RAS text file created by the user thru
  HEC-RAS program
• After creating HEC-RAS output text file, open
  WinTR-20 Windows interface and click File then
  Import HEC-RAS
• Rating table program comes as a part of the
  Window WinTR-20 system.

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Modify Profile Output Table

• Bring up a project from HEC-RAS
• Select Profile Summary Table from View menu .

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Modify Profile Output Table

• Profile Output Table-Standard Table 1 will
  appears.
• Select Define Table from Options pull down
  menu.

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Modify Profile Output Table

• Create a Table Heading window will appears.
• Click on Clear All Table Headings
• Double click to select Min. Ch El, LOB Elev,
  ROB Elev, W.S.Elev, Q Total, Flow Area, Top
  Width, and Frcnt Slope.

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Modify Profile Output Table

• After all seven columns have been selected.
• Click on Additional Options tab.
• Since only Valley Cross Sections are desired
  the only box that should be checked is Cross
  Sections
• Click OK to exist.

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Modify Profile Output Table

• Note the order of the columns Min Ch El, LOB
  Elev, ROB Elev, W.S.Elev, Q Total, Top Width, and
  Frctn Slope.
• Save Profile Output Table by select Save Table
  from the Options pull down menu.

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Modify Profile Output Table

• Enter name of new Table (Modify). Click OK.
• The Profile Output Table-Modify is available
• under User Tables menu as well as other.

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Modify Profile Output Table

• Profile Output Table-Modify must be saved as text
  file (Modify.txt).
• Select Write to Text File from File menu.

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Modify Profile Output Table

• Select an appropriate name for the text file
  (Modify.txt)
• Select a directory
• Click Save

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Import HEC-RAS into WinTR-20

• Using Windows Explorer, go to the WinTR-20
  Executables directory and click on
• The following WinTR-20 System Controller/ Editor
  Screen comes up

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Import HEC-RAS into WinTR-20

• Select Import
• HEC-RAS from
• File pull down menu
• Locate the directory,
• select text file name
• (Modify.txt)

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Import HEC-RAS into WinTR-20

• WinTR-20 Identifier window will pop up
• Edit / Enter
• - Min. Hydrograph Value
• - Watershed Description
• Click Accept Changes
• (Close) to close
• this window

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Import HEC-RAS into WinTR-20

• Bring you back to the WinTR-20 System Controller
  / Editor window
• Double click on Stream
• Cross Section

Note (X indicates some data entered for section)
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Import HEC-RAS into WinTR-20

• Stream Cross Section window will appears.
• Select Cross Section from pull down menu.

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Import HEC-RAS into WinTR-20

• Click on Display Data button for graphical
  view of the Stream Cross Section Display Data.
• Click on No Changes (Close) button to close
  this window.

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Import HEC-RAS into WinTR-20

• From File menu, select Save As give a file
  name and location.
• Run button is now available.

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Import HEC-RAS into WinTR-20

• Try to Run WinTR-20
• Generated WinTR-20 Error File
• - No Stream Reach data
• - No Sub-Area data.
• - No Storm Analysis data.

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Obtaining NOAA Atlas 14 Rainfall Data Importing
into WinTR-20
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Program to convert HEC-RAS output into WinTR-20
Cross Section

• Program is incorporated into Windows interface
• Reads NOAA Atlas 14 text file created by the user
  thru download
• After download text file, open WinTR-20 Windows
  interface and click File then Import NOAA
  Atlas Data
• Rainfall Distribution and Rainfall Data comes as
  a part of the Window WinTR-20 system.

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NOAA NWS web site

• Open the NOAA NWS web site at http//dipper.nws.no
  aa.gov/hdsc/pfds/

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Import NOAA Data into WinTR-20

• Data for the states and PR/VI shaded in purple
  are available.
• Click on the desired state (Maryland)

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Import NOAA Data into WinTR-20
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Import NOAA Data into WinTR-20

• Select specific observing site from the list.
• Enter fixed location (Latitude and Longitude).
• Click on map to select location.
• Click Submit site or Submit location

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Import NOAA Data into WinTR-20

• Select site from list COLLEGE PARK MD
  (18-1995).
• Click Submit site button.
• Click OK button.

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Import NOAA Data into WinTR-20

• Click Text version of tables button.
• NOAA Atlas 14 Precipitation frequency estimates
  (inches) table will pop up.

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Import NOAA Data into WinTR-20

• Select an appropriate name for the text file
  (College Park, MD)
• Make Save as type Text File (.txt)
• Select a directory
• Click Save

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Import NOAA Data into WinTR-20

• Using Windows Explorer, go to the WinTR-20
  Executables directory and click on
• The following WinTR-20 System Controller/ Editor
  Screen comes up

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Import NOAA Data into WinTR-20

• Select Import NOAA Atlas Data from File
  pulldown menu.
• Locate the directory, select text file name
  CollegePark MD.txt

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Import NOAA Data into WinTR-20

• Option to smooth the NOAA Atlas 14 Data ?

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Import NOAA Data into WinTR-20

• WinTR-20 Identifier window will pop up
• Edit / Enter
• - Min. Hydrograph Value
• - Watershed Description
• Click Accept Changes
• (Close) to close
• this window

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Import NOAA Data into WinTR-20

• Bring you back to the WinTR-20 System Controller
  / Editor window
• Double click on Storm Analysis
• Double click on Rainfall Distribution

Note (X indicates some data entered for section)
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Import NOAA Data into WinTR-20

• Select Rain Table Identifier from pull down
  menu.
• Click Display Data button for graphical view of
  the Rainfall Distribution.
• Click No Changes (Close) button to close this
  window.

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Standard Curve
Smooth Curve
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Import NOAA Data into WinTR-20

• From File menu, select Save As give a file
  name and location.
• Run button is now available.

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Import NOAA Data into WinTR-20

• Try to Run WinTR-20
• Generated WinTR-20 Error File
• - No Stream Reach data
• - No Sub-Area data.

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Import NOAA Data into WinTR-20

• Warning do not import NOAA Atlas data to an
  existing WinTR-20 file using the WinTR-20
  Controller/Editor. The existing data will be
  erased and replaced by NOAA Atlas Data.
• Instead, save the WinTR-20 input file containing
  NOAA Atlas Data, close WinTR-20, and use Notepad
  to copy and paste the data into the existing
  WinTR-20 data file.

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The End
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