WinTR-20 Project Formulation Hydrology Computer Program - PowerPoint PPT Presentation

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WinTR-20 Project Formulation Hydrology Computer Program

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Title: NRCS TR20 - Hydrology Model Author: WinTR-20 Development Team Last modified by: quan.quan Created Date: 4/18/2001 12:59:11 PM Document presentation format – PowerPoint PPT presentation

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Title: WinTR-20 Project Formulation Hydrology Computer Program


1
WinTR-20Project Formulation HydrologyComputer
Program
  • Basic
  • Input and Output

Presented by WinTR-20 Development Team
2
  • This presentation demonstrates the new WinTR-20
    computer program model. Using a simple example,
    you will learn how to
  • Create an Input File
  • Run WinTR-20
  • View Output

3
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.

4
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
5
Data Sources
  • The data presented in the next 5 slides have been
    gathered prior to inputting into WinTR-20.
  • The data includes
  • Sub-Area Watershed Characteristics
  • Stream Reach Hydraulics
  • Storage Structure Hydraulics
  • Evaluation Storm Amounts and Distribution

6
Sub-Area Parameters
Sub-Area Parameters Sub-Area 1 Sub-Area 2 Sub-Area 3
Drainage Area (sq.mi.) 1.88 0.51 1.54
Runoff Curve Number 70 74 70
Time of Concentration (hr) 1.23 0.72 1.59
Receiving Reach Number 1 2 Outlet
7
Reach Parameters
Reach Parameter Reach 1 Reach 2
Receiving Reach Reach 2 Outlet
Reach Type Structure (Struct 1) Channel (Xsec 2)
Reach Length NA 5400 feet
8
Reach 1 Structure Data
  • Example problem assumes pool is empty (EL 2423.0)
    when storm begins.

Elevation Discharge (cfs) Storage (acre-feet)
2423.0 0 0.0
2438.0 50.0 52.3
2440.0 57.0 76.6
2450.0 83.0 375.7
2457.0 98.0 600.0
2458.0 155.0 631.0
2459.0 370.0 700.0
2461.5 1350.0 915.0
2463.0 2100.0 1070.0
9
Reach 2 Rating Table
  • Data derived from HECRAS, Mannings, etc.
  • Reach Length 5400 feet, Bankfull Elevation
    2422.5

Elevation Discharge (cfs) End Area (ft2) Top Width (ft) Friction Slope (ft/ft)
2410.0 0 0 0 0.005
2413.3 50 41 31 0.0018
2413.4 100 81 42 0.005
2416.9 500 296 78 0.007
2419.3 1000 502 100 0.008
2422.1 2000 843 193 0.001
2423.9 3000 1751 1440 0.001
2425.0 4000 3844 1994 0.007
10
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
    into WinTR-20)

11
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

12
WinTR-20 System Controller / Editor Window
  • Click on the File menu, select New WinTR-20
    File

13
WinTR-20 Identifier Record
  • WinTR-20 Identifier will appear.
  • Select Input Units Code and Output Units
    Code (English or Metric)
  • Enter Minimum Hydrograph Value
  • Enter Watershed Description
  • Accept Changes (Close) button to complete this
    record.

14
Suggested Input Entry Order
  1. Enter storm event data
  2. Enter all sub-area(s) information
  3. Enter all reach(es) information
  4. Enter cross section rating data (elev, discharge,
    end area, top width, friction slope) and storage
    rating data (elev, discharge, storage) if model
    has reach or storage routing
  5. Global output preferences

15
Entering Storm Data
  • Select Storm Analysis to enter rainfall
    amounts and distribution.

16
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 WinTR-20)

17
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.

18
Entering Storm Data
  • 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.

19
Entering Storm Data
  • 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.

20
Enter Sub-Area Data
  • Enter Sub-Area data by clicking on Sub-Area

21
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.

22
Entering Sub-Area Data
  • If a single 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

23
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.

24
Getting Help
  • To get help at any time on input parameters,
    simply click on the 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.

25
Sub-Area Parameters
Sub-Area Parameters Sub-Area 1 Sub-Area 2 Sub-Area 3
Drainage Area (sq.mi.) 1.88 0.51 1.54
Runoff Curve Number 70 74 70
Time of Concentration (hr) 1.23 0.72 1.59
Receiving Reach Number 1 2 Outlet
26
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.

27
Entering 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).

28
Reach Parameters
Reach Parameter Reach 1 Reach 2
Receiving Reach Reach 2 Outlet
Reach Type Structure (Struct 1) Channel (Xsec 2)
Reach Length NA 5400 feet
29
Entering 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.

30
Entering 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.

31
Entering Structure Data
  • After the Stream Data was entered and accepted,
    select Structure Rating from the main window.
  • From the pull-down menu Struct 1 is selected.

32
Reach 1 Structure Data
  • Example problem assumes pool is empty (EL 2423.0)
    when storm begins.

Elevation Discharge (cfs) Storage (acre-feet)
2423.0 0 0.0
2438.0 50.0 52.3
2440.0 57.0 76.6
2450.0 83.0 375.7
2457.0 98.0 600.0
2458.0 155.0 631.0
2459.0 370.0 700.0
2461.5 1350.0 915.0
2463.0 2100.0 1070.0
33
Entering Structure Data
  • This example has WinTR-20 start the routing at
    the lowest elevation.
  • Enter data one line at time for the Structure
    Elevation, Discharge and Storage
  • The user can click on Display Data for a
    graphical view of the data just input.
  • Click on Accept Changes (Close) button when
    finished.

34
Entering Stream Cross Section Data
  • After the Structure Data was entered and
    accepted, the user is ready to enter the stream
    cross section data. The user selects Stream
    Cross Section

35
Entering Stream Cross Section Data
  • On the pull down menu, Xsec 2 is selected.

36
Reach 2 Rating Table
  • Data derived from HEC-RAS, Mannings, etc.
  • Reach Length 5400 feet, Bankfull Elevation
    2422.5

Elevation Discharge (cfs) End Area (ft2) Top Width (ft) Friction Slope (ft/ft)
2410.0 0 0 0 0.005
2413.3 50 41 31 0.0018
2413.4 100 81 42 0.005
2416.9 500 296 78 0.007
2419.3 1000 502 100 0.008
2422.1 2000 843 193 0.001
2423.9 3000 1751 1440 0.001
2425.0 4000 3844 1994 0.007
37
Entering Stream Cross Section Data
  • On the pull down menu, Xsec2 is selected.
  • 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.

38
Entering Stream Cross Section Data
  • The user can click on Display Data for a
    graphical view of the data just input.
  • Click on Accept Changes (Close) button when done

39
Entering Stream Cross Section Data
  • Notes on Cross Section Data
  • Data usually prepared ahead of time using water
    surface profile programs such as HEC-RAS.
  • Bankfull Elevation represents the right or left
    channel bank whichever is lower.
  • Low ground represents the elevation where flood
    plain storage begins. If blank, it defaults to
    bankfull elevation.
  • Stream Identifier and Stream Station may be left
    blank (used only for NRCS Economic Analysis)

40
Global Output
  • After the Storm Data has been entered and
    accepted, the user is ready to enter the Global
    Output. The user selects Global Output

41
Global Output
  • Select Hydrograph Print Precision, Minimum
    Hydrograph Display Flow and Print Time Increment
    or use blank defaults.
  • Select output options.
  • At least one output option (Yes) must be selected.

42
Saving Input File
  • From the File menu, select Save As to give a
    file name and directory to save to.

43
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.

44
Checking Data Prior to Running WinTR-20
  • The Schematic shows how the sub-areas and reaches
    are configured.
  • Make sure that Legend and Labels under the
    View options are turned on.

45
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.

46
WinTR-20 Output- Printed Page File
  • Following a successful run, the 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.

47
WinTR-20 Output- Debug File
  • After viewing, the Printed Page File there may
    be other output to view.
  • Click View and see if there is a Debug File.
  • Output can be sent to the printer from this
    screen.

48
WinTR-20 Output - Plots
  • WinTR-20 also has graphical output capabilities.
  • Following a successful run, the Plots option
    can be selected ...

49
WinTR-20 Output - Plots
  • In this example, the Hydrograph for Sub-Area 2
    100-year storm 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.

50
WinTR-20 Output - Plots
  • To view the Hydrograph, click on Display
    button.
  • Options include printing, copying, and zooming in
    and out.

51
WinTR-20 Output - Plots
  • 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 100-year event is
    selected.

52
WinTR-20 Output - Plots
  • To view the multiple Hydrograph plot, click on
    Display button.

53
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.

54
Global Output
  • 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.

55
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 left mouse click in
    another data box) to be recognized.

56
The End
57
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