Win TR20 Principal Spillway Stability Design and Freeboard
Win. TR-20 Principal Spillway, Stability Design, and Freeboard Hydrographs Presented by: Win. TR-20 Development Team Win. TR-20 PS, SD, FB Hydrographs June 2015 1
Lesson Objectives Introduce NRCS Technical Release 60 (TR-60) criteria for developing structure design hydrographs. 2. How to input data for Principal Spillway, Stability Design, and Freeboard storms to the Win-TR 20 computer program. 3. How to develop PS, SD, and FB hydrographs for import to the Win. DAM computer program. 1. Win. TR-20 PS, SD, FB Hydrographs June 2015 2
What is TR-60 ? l TR-60 includes criteria for designing dams. l The latest version is 2005. l Specifically of interest to hydrologists are criteria for selection of rainfall amount for the design storms. Win. TR-20 PS, SD, FB Hydrographs June 2015 3
TR-60 Hazard Classification Win. TR-20 PS, SD, FB Hydrographs June 2015 4
Principal Spillway Criteria Typical data source is NOAA Atlas 14 if available. Win. TR-20 PS, SD, FB Hydrographs June 2015 5
PS Criteria – Quick Return Flow Win. TR-20 PS, SD, FB Hydrographs June 2015 6
PS Criteria – Runoff Volume Win. TR-20 PS, SD, FB Hydrographs June 2015 7
PS Criteria – Ratio 1 -day/10 -day Q Win. TR-20 PS, SD, FB Hydrographs June 2015 8
Stability Design and Freeboard Criteria Auxiliary spillway hydrograph is the same as Stability Design terminology used in Win. TR-20 PS, SD, FB Hydrographs June 2015 9
Stability Design and Freeboard Criteria TR-60 includes a detailed list of data sources for locations in the United States. q NOAA Atlas 14 is typical data source for 100 -year precipitation if available. q NOAA Hydrometeorological Series Reports (HMR) are typical data sources for probable maximum precipitation (PMP) if available. q Win. TR-20 PS, SD, FB Hydrographs June 2015 10
SD and FB criteria – areal reduction Win. TR-20 PS, SD, FB Hydrographs June 2015 11
Principal Spillway Data Window Win. TR-20 PS, SD, FB Hydrographs June 2015 12
Principal Spillway Data Help Win. TR-20 PS, SD, FB Hydrographs June 2015 13
Stability Design Freeboard Data Window Win. TR-20 PS, SD, FB Hydrographs June 2015 14
Stability Design Freeboard Data Help Win. TR-20 PS, SD, FB Hydrographs June 2015 15
Principal Spillway, Stability Design, and Freeboard Hydrographs Win. TR-20 Demo Example Win. TR-20 PS, SD, FB Hydrographs June 2015 16
Principal Spillway, Stability Design, and Freeboard Hydrographs Watershed near Harrison, Boone County, Arkansas o o Drainage Area 8. 0 square miles Curve Number 78 Time of Concentration 2. 3 hours Hazard Classification “Significant” Win. TR-20 PS, SD, FB Hydrographs June 2015 17
Open Win. TR-20, Open new input file Click Win. TR-20 icon from desktop § Click File and § New Win. TR-20 File § Win. TR-20 PS, SD, FB Hydrographs June 2015 18
Enter Watershed Description, Open Principal Spillway Data § Enter Watershed Description § Click Accept Changes (Close) § Click Principal Spillway Data Win. TR-20 PS, SD, FB Hydrographs June 2015 19
Enter Principal Spillway Data § Enter Description § Click Look Up for Climatic Index § Click OK button § Enter PS Precipitation § Click Accept Changes (Close) Win. TR-20 PS, SD, FB Hydrographs June 2015 20
Win. TR-20 Main Window q Click File and Save As q Select directory and enter file name, Save q Click Stability Freeboard Data Win. TR-20 PS, SD, FB Hydrographs June 2015 21
Enter Stability Freeboard Data l Click Accept Changes (Close) l Click Subarea: l Win. TR-20 PS, SD, FB Hydrographs June 2015 22
Enter Sub-area Data Enter Subarea Data q Click Accept Changes (Close) q Click Global Output: q Win. TR-20 PS, SD, FB Hydrographs June 2015 23
Enter Global Output Data q Click Accept Changes (Close) q Win. TR-20 PS, SD, FB Hydrographs June 2015 24
Save data and run Win. TR-20 q Click File and Save q Click Run Win. TR-20 PS, SD, FB Hydrographs June 2015 25
Win. TR-20 Printed Page Output Scroll to end of file for summary Win. TR-20 PS, SD, FB Hydrographs June 2015 26
View Debug Output File Click View and Debug File PS Data Prep SD FB Data Prep Close Win. TR-20 PS, SD, FB Hydrographs June 2015 27
Win. TR-20 Hydrograph Output File Click View and Hydrograph File Scroll to SDH and FBH hydrographs Win. TR-20 PS, SD, FB Hydrographs June 2015 28
Win. TR-20 hydrograph plots Click Plots Select Storms and Location Close Win. TR-20 PS, SD, FB Hydrographs June 2015 29
Isabel - 2003 Win. TR-20 PS, SD, FB Hydrographs June 2015 30
QUESTIONS? ? ? Win. TR-20 PS, SD, FB Hydrographs June 2015 31
The End Win. TR-20 PS, SD, FB Hydrographs June 2015 32
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