Win TR20 Project Formulation Hydrology Computer Program Overview

Win. TR-20 Project Formulation Hydrology Computer Program Overview Prepared by Quan D. Quan Hydraulic Engineer, NRCS Legislative Office Building Hartford, Connecticut October 26, 2010

Objectives l Background of the development: Win. TR 20 computer program l Provide a brief description of the program l Give an overview of the model, including its capabilities and limitations Win. TR-20 Overview October 2010 2

Background l Technical Release 20 Computer Program for Project Formulation Hydrology (TR -20) was first released in 1965 l Revised in 1982, 1983, and 1986 l Revision in February 1992 l Major revision late 1998 Win. TR-20 Overview October 2010 3

Background (continued) l Major revision in late 1998 - Win. TR-20 team was formed. - Win. TR-20 team charge was to: 1. 2. 3. 4. 5. Modernize and revise the TR-20 computer software. Upgrade the source code to Visual Basic. Change the philosophy of data input. Provide plots. Windows interface and output post-processor. - First version of Windows based Win. TR-20 was released in late September 2004. Win. TR-20 Overview October 2010 4

Win. TR-20 New Features l Muskingum-Cunge Channel Routing replaces ATT-KIN l Sub-Area / Reach Routing Concept replaces old Standard Control l Runoff Curve Number (RCN) Calculation Option l Time of Concentration (Tc) Calculation Option Win. TR-20 Overview October 2010 5

Win. TR-20 New Features (continued) l Graphics - Hydrographs - Reach / Structure Rating - Schematic Win. TR-20 Overview October 2010 6

Model Overview l Win. TR-20 System Controller / Editor l Capabilities / Limitations l Minimum Data Requirements Win. TR-20 Overview October 2010 7

Win. TR-20 System Controller / Editor File l File - New Win. TR-20 File New! - Open Existing Win. TR-20 File - Re. Open Last Session - Convert Old Data - Import HEC-RAS - Import NOAA-NRCC Data - Local Land Use - Local Soil / HSG - Save As - Exit Win. TR-20 Overview October 2010 8

Win. TR-20 System Controller / Editor View l View - Schematic - Input File - Printed Page File - Error File - Debug File - Hydrograph File - Flood. Econ File - Smoothed NOAA File Win. TR-20 Overview October 2010 9

Win. TR-20 System Controller / Editor Run l Run Win. TR-20 Overview October 2010 10

Win. TR-20 System Controller / Editor Plots l Plots - Hydrograph - Storm - Peak Flow - Time Analysis - Alternate - Location Win. TR-20 Overview October 2010 11

Win. TR-20 System Controller / Editor Help l Help - Win. TR-20 System Diagram - Overview - Help Facilities - Getting Started - About Controller / Editor - Smoothing NOAA 14 Data Win. TR-20 Overview October 2010 12

Win. TR-20 System Controller / Editor – Data Section l l l l Alternate Analysis: Dimensionless Unit Hydrograph: Duration Increment: Global Output: Input Hydrograph: Rainfall Distribution: Stream Cross Section: Stream Reach: Storm Analysis: Structure Rating: Sub-Area: Time Analysis: Win. TR-20: Version 1. 11 Verification: Win. TR-20 Overview October 2010 13

Win. TR-20 Identifier Window l Win. TR-20: Version 1. 11 - Input Units Code: - Output Units Code: - Minimum Hydrograph Value: - Watershed Description: Win. TR-20 Overview October 2010 14

Close Window Buttons l Two choices are given on most screens: - Accept Changes (Close) – All data shown will written to the input file. Selecting this accepts the data you’ve entered and returns you to the previous screen. - No Changes (Close) – None of the changes made to items in that window will be written to the input file. Select this to keep the original data and return to the previous screen. Win. TR-20 Overview October 2010 15

Sub-area/Reach Concepts l l Watershed - system of sub-areas and reaches Sub-areas - watersheds that generate runoff - feed into the upstream end of reaches l Reaches or Routing Elements- represent watershed stream flow paths or structures – Channel Routing elements - Stream Reaches – Structure Routing elements - Reservoir/Structure Reaches l Watershed Outlet -final reach (required for all watersheds) Win. TR-20 Overview October 2010 16

Sub-area/Reach Concepts l l l Win. TR-20 Overview October 2010 Watershed - system of sub-areas and reaches Sub-areas - watersheds that generate runoff Reaches - represent watershed flow paths (stream channels) or structures 17

Sub-area Connectivity Sub-area Win. TR-20 Overview Receiving Reach A 1 R 1 (storage) A 2 R 2 (stream) A 3 Outlet October 2010 18

Reach Connectivity Upper Reach Receiving Reach R 1 (res. ) R 2 (stream) Outlet R 2 Win. TR-20 Overview October 2010 19

Schematics Sub-area 2 Reach 2 Outlet (Reach Routing) Reach 1 (storage routing) Sub-area 3 1 a e r a b- Legend Su Storage Area Sub-Area Inflow Points Win. TR-20 Overview October 2010 20

Win. TR-20 Schematics Win. TR-20 Overview October 2010 21

Sub-Area: Window l Sub-Area: - Sub-Area Identifier: - Sub-Area Reach Identifier: - Sub-Area Rain Gage Identifier: - Sub-Area Peak Output Code: - Sub-Area Hydrograph Output Code: - Sub-Area Time Analysis Code: - Sub-Area Hydrograph File Code: l Land Use Details l Tc Details Win. TR-20 Overview October 2010 22

Help Window l Click on text variable name. Click on it again to remove the help. Win. TR-20 Overview October 2010 23

Stream Reach: Window Win. TR-20 Overview October 2010 24

Stream Cross Section: Window Win. TR-20 Overview October 2010 25

Structure Rating: Window Win. TR-20 Overview October 2010 26

Storm Analysis: Window Win. TR-20 Overview October 2010 27

Global Output: Window Win. TR-20 Overview October 2010 28

Rainfall Distribution: Window Win. TR-20 Overview October 2010 29

Input Hydrograph: Window Win. TR-20 Overview October 2010 30

Dimensionless Unit Hydrograph: Window Win. TR-20 Overview October 2010 31

Alternate Analysis: Window Win. TR-20 Overview October 2010 32

Verification: Window Win. TR-20 Overview October 2010 33

Output l Graphical l Tabular Win. TR-20 Overview October 2010 34

File Management within Win. TR-20 l Input file l Output file l Hydrograph file l Error file l Debug file Win. TR-20 Overview October 2010 “example. inp” “example. out” “example. hyd” “example. err” “example. dbg” 35

Capabilities & Limitations l l l l Types of reaches Channel or Structure Channel Manning “n” 0. 005 -1. 00 Reach Routing Muskingum-Cunge Sheet Flow Max. Length 100 feet Runoff Curve Number 30 -100 Weighted Curve Number 30 -100 Drainage Area 1 acre to 300 square miles Single sub-area min 1 acre - max 20 sq. miles Win. TR-20 Overview October 2010 36

Minimum Data Requirements l Data required for a single sub-area run can be entered on the Win. TR-20 System Controller/Editor Main Window. These data include: – Win. TR-20 Identifier – Input and Output Units Code, Minimum Hydrograph Value, and Watershed Description – Storm Analysis Identifier – Gage Rain Table (Type I, etc. ), Gage Antecedent Runoff Condition, and Rainfall Data – Sub-Area Identifier – Reach, Drainage Area, Weighted Curve Number, Time of Concentration (Tc), and Output Code (Peak, Hydrograph, Time Analysis, and Hydrograph File) – Global Output (at least one item selected). Win. TR-20 Overview October 2010 37

User Responsibility l Results from the model can be sensitive to the input data. l It is the user’s responsibility to ensure that all the input data (whether it is actually entered or implied through default values for blank data fields) is appropriate. Win. TR-20 Overview October 2010 38

Win. TR-20 web sites l NRCS users may find Win. TR-20 by: Contact your state ITS for download l Non-NRCS users may find Win. TR-20 at: http: //www. wsi. nrcs. usda. gov/products/W 2 Q/ H&H/Tools_Models/Win. TR 20. html l E-mail questions to: LO-OR-NRCS-TR 20@one. usda. gov Win. TR-20 Overview October 2010 39

Win. TR-20 Development Team l l l l l William H. Merkel Helen Fox Moody Quan Dan Moore John Mc. Clung Pete Cooper Geoff Cerrelli Thom Garday Don Woodward Roger Cronshey Win. TR-20 Overview Maryland 301 -504 -3956 Maryland 301 -504 -3948 Maryland 301 -504 -3952 Oregon 503 -414 -3054 Arkansas 501 -210 -8902 Minnesota 651 -602 -7884 Pennsylvania 717 -237 -2214 Arkansas 501 -210 -8905 NRCS-Retired October 2010 40

Summary l Reviewed the background of the development for Win. TR-20 l Provided a brief description of the Program l Gave an overview of the model including its capabilities and limitations Win. TR-20 Overview October 2010 41

The End Win. TR-20 Overview October 2010 42

Win. TR-20 Overview October 2010 43