WinTR-20 Project Formulation Hydrology Computer Program Overview Presented by: WinTR-20 Development Team

WinTR-20 Overview March Objectives Background of the development: WinTR- 20 computer program Provide a brief description of the program Give an overview of the model, including its capabilities and limitations

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

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

WinTR-20 Overview March WinTR-20 New Features Muskingum-Cunge Channel Routing replaces ATT-KIN Sub-Area / Reach Routing Concept replaces old Standard Control Runoff Curve Number (RCN) Calculation Option Time of Concentration (Tc) Calculation Option

WinTR-20 Overview March WinTR-20 New Features (continued) Graphics - Hydrographs - Reach / Structure Rating - Schematic

WinTR-20 Overview March Model Overview WinTR-20 System Controller / Editor Capabilities / Limitations Minimum Data Requirements

WinTR-20 Overview March WinTR-20 System Controller / Editor - File File - New WinTR-20 File - Open Existing WinTR-20 File - ReOpen Last Session - Convert Old Data - Import HEC-RAS - Import NOAA Atlas Data - Local Land Use - Local Soil / HSG - Save - Save As - Exit New!

WinTR-20 Overview March WinTR-20 System Controller / Editor - View View - Schematic - Input File - Printed Page File - Error File - Debug File - Hydrograph File - FloodEcon File - Smoothed NOAA File

WinTR-20 Overview March WinTR-20 System Controller / Editor - Run Run

WinTR-20 Overview March WinTR-20 System Controller / Editor - Plots Plots - Hydrograph - Storm - Peak Flow - Time Analysis - Alternate - Location

WinTR-20 Overview March WinTR-20 System Controller / Editor - Help Help - WinTR-20 System Diagram - Overview - Help Facilities - Getting Started - About Controller / Editor - Smoothing NOAA 14 Data

WinTR-20 Overview March WinTR-20 System Controller / Editor – Data Section 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: WinTR-20: Version 1.11 Verification:

WinTR-20 Overview March WinTR-20 Identifier Window WinTR-20: Version Input Units Code: - Output Units Code: - Minimum Hydrograph Value: - Watershed Description:

WinTR-20 Overview March Close Window Buttons Two choices are given on most screens: - Accept Changes (Close) - 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) - 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.

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

WinTR-20 Overview March Sub-area/Reach Concepts Reaches - represent watershed flow paths (stream channels) or structures Watershed - system of sub-areas and reaches Sub-areas - watersheds that generate runoff

WinTR-20 Overview March Sub-area Connectivity Sub-area Receiving Reach A1R1 (storage) A2R2 (stream) A3Outlet

WinTR-20 Overview March Reach Connectivity Upper Reach Receiving Reach R1 (res.)R2 (stream) R2 (stream)Outlet R1 R2

WinTR-20 Overview March Reach 1 (storage routing)Schematics Reach 2 (Reach Routing ) Sub-area 3 Storage Area Sub-Area Inflow Points Legend Outlet Sub-area 2 Sub-area 1

WinTR-20 Overview March WinTR-20 Schematics

WinTR-20 Overview March Sub-Area: Window 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: Land Use Details Tc Details

WinTR-20 Overview March Help Window Click on text variable name. Click on it again to remove the help.

WinTR-20 Overview March Stream Reach: Window

WinTR-20 Overview March Stream Cross Section: Window

WinTR-20 Overview March Structure Rating: Window

WinTR-20 Overview March Storm Analysis: Window

WinTR-20 Overview March Global Output: Window

WinTR-20 Overview March Rainfall Distribution: Window

WinTR-20 Overview March Input Hydrograph: Window

WinTR-20 Overview March Dimensionless Unit Hydrograph: Window

WinTR-20 Overview March Time Analysis: Window

WinTR-20 Overview March Alternate Analysis: Window

WinTR-20 Overview March Verification: Window

WinTR-20 Overview March Output Graphical Tabular

WinTR-20 Overview March File Management within WinTR-20 Input file“example.inp” Output file“example.out” Hydrograph file“example.hyd” Error file“example.err” Debug file“example.dbg”

WinTR-20 Overview March Capabilities & Limitations Types of reachesChannel or Structure Channel Manning “n” Reach RoutingMuskingum-Cunge Sheet Flow Max. Length100 feet Runoff Curve Number Weighted Curve Number Drainage Area 1 acre to 300 square miles Single sub-area min 1 acre - max 20 sq. miles

WinTR-20 Overview March Minimum Data Requirements Data required for a single sub-area run can be entered on the WinTR-20 System Controller/Editor Main Window. These data include: –WinTR-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).

WinTR-20 Overview March User Responsibility Results from the model can be sensitive to the input data. 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.

WinTR-20 Overview March WinTR-20 web sites NRCS users may find WinTR-20 by: Contact your state ITS for download Non-NRCS users may find WinTR-20 at: H&H/Tools_Models/WinTR20.html questions to:

WinTR-20 Overview March WinTR-20 Development Team William H. MerkelMaryland Helen Fox MoodyMaryland Quan D. QuanMaryland Dan MooreOregon John McClungArkansas Pete CooperMinnesota Geoff CerrelliPennsylvania Thom GardayArkansas Don WoodwardNRCS-Retired Roger CronsheyNRCS-Retired

WinTR-20 Overview March Summary Reviewed the background of the development for WinTR-20 Provided a brief description of the Program Gave an overview of the model including its capabilities and limitations

WinTR-20 Overview March The End

WinTR-20 Overview March