Win TR20 Project Formulation Hydrology Computer Program Advanced

Win. TR-20 Project Formulation Hydrology Computer Program Advanced Features Presented by: Win. TR-20 Development Team Win. TR-20 Advanced Features March 2009 1

Nine Features Local Land Use and Local Soil Data l Land Use Details l Time of Concentration Details l Diversions l Time analysis l Dimensionless unit hydrograph (DUH) l Custom rain table l Input hydrograph l Alternative l Win. TR-20 Advanced Features March 2009 2

Local Land Use Open Win. TR-20. l Open New Win. TR-20 file. l Provide a watershed description and Accept. l Enter Local Land Use and/or Local Soil Data. l Win. TR-20 Advanced Features March 2009 3

Local Land Use l Click file and Local Land Use Win. TR-20 Advanced Features March 2009 4

Local Land Use Win. TR-20 Advanced Features March 2009 5

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Local Soil Data Win. TR-20 Advanced Features March 2009 9

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Local Soil Data will be saved for future Win. TR-20 sessions. Win. TR-20 Advanced Features March 2009 12

Land Use Details Win. TR-20 Advanced Features March 2009 13

Land Use Details Win. TR-20 Advanced Features March 2009 14

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Tc Details Win. TR-20 Advanced Features March 2009 18

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Tc Details Win. TR-20 Advanced Features March 2009 26

CN and Tc Detail Output Win. TR-20 Advanced Features March 2009 27

CN and Tc Details Output Win. TR-20 Advanced Features March 2009 28

Diversions Win. TR-20 Advanced Features March 2009 29

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Diversion options Divert flow over a certain value. l Divide flow based on two rating curves. l Send diverted flow outside the watershed. l Send the diverted flow to another stream reach. l Win. TR-20 Advanced Features March 2009 36

Diversion example Win. TR-20 Advanced Features March 2009 37

Time Analysis Time analyses may assist with determining economic damages caused by flood water. l At any reach and cross section, the time at which a particular discharge or elevation is exceeded may be determined. l For example, what is the time for which an elevation of 500 feet is exceeded at a particular cross section ? l Win. TR-20 Advanced Features March 2009 38

Time Analysis Win. TR-20 Advanced Features March 2009 39

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Time Analysis Summary Select time analysis based on Flow or Elevation l Flow or Elevation are both useful for reaches with valley cross sections l Elevation is generally more useful for Structures l Select all Sub-areas and Reaches or specific ones. l Win. TR-20 Advanced Features March 2009 50

Dim Unit Hydrograph Win. TR-20 Advanced Features March 2009 51

Dim Unit Hydrograph Win. TR-20 Advanced Features March 2009 52

Dim Unit Hydrograph Win. TR-20 Advanced Features March 2009 53

Dim Unit Hydrograph Win. TR-20 Advanced Features March 2009 54

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Dim Unit Hydrograph DUH’s with peak rate factors are available for values of 100 to 600 at an interval of 50. l These are included in the revised Chapter 16 of NEH – Hydrology. l An example is shown next. l Win. TR-20 Advanced Features March 2009 57

Dim Unit Hydrograph Win. TR-20 Advanced Features March 2009 58

Dim Unit Hydrograph l These may be copied and pasted into the Win. TR-20 data file using Notepad or a similar text editor. Win. TR-20 Advanced Features March 2009 59

Custom Rain Table Win. TR-20 has standard rainfall distribution tables available for selection. l These include the commonly used Type II and Type III. l To enter a custom rainfall table, open the Rainfall Distribution data window. l Win. TR-20 Advanced Features March 2009 60

Custom Rain Table Win. TR-20 Advanced Features March 2009 61

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Custom Rain Table More than one rainfall table may be entered. l To transport rainfall tables from one Win. TR-20 data file to another, use Notepad to copy and paste. l Win. TR-20 Advanced Features March 2009 66

Input Hydrograph A hydrograph coming from another source may be inserted into the stream network. l The hydrograph may be coming in from a neighboring watershed. l The hydrograph may have been developed by another procedure such a dam break hydrograph. l Win. TR-20 Advanced Features March 2009 67

Input Hydrograph Win. TR-20 Advanced Features March 2009 68

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Input Hydrograph After selecting the Hydrograph Output file close Win. TR-20. l Rename the Hydrograph Output file to a different name and change extension to. inp l Open Win. TR-20, open Existing Input File and select the file with Hydrograph Output. l Win. TR-20 Advanced Features March 2009 75

Input Hydrograph Win. TR-20 Advanced Features March 2009 76

Input Hydrograph Win. TR-20 Advanced Features March 2009 77

Alternative Analysis Win. TR-20 Advanced Features March 2009 78

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The End Win. TR-20 Advanced Features March 2009 89