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CEG 795: Water Resources Modeling and GIS, Spring 2006

E ercise !7: "d#anced $%draulic &eatures in $EC'GeoR"S(e#ee "lign)ent, Ine**ecti#e &lo+ "reas, loc-ed ./structions

PurposeThe purpose of this lab is for the user to become acquainted with inputting the data required to input bridge/culvert, ineffective flow area, blocked obstruction and levee information into a HEC- !" input fileusing #$" data and HEC-#eo !"% Then, this data will be added to the HEC- !" file created withE&ercise '%

(oading "oftware and )ata

*% )ownload the +ip file for E&ercise from the course website and un+ip into a directorc:\workspace/ex7 %

.% "tart !rc ap and open the file ex7.mxd % This is a continuation of the material covered in E&ercise '%The stream centerline, banks, flowpaths, landuse, and anning0s n values have alread been created%

1% "elect ools, Custo)i1e select the ool/ars tab and put a check ne&t to HEC-#eo !" to displa theHEC-#eo !" toolbar% "elect ools, E tensions and make sure that the 1-) !nal st, and "patial!nal st e&tensions are activated%

"R I: $EC GeoR"SCreating !" 2eature Classes2or this lab, we will be creating the features classes of (e#ee "lign)ents , Ine**ecti#e &lo+ "reas , and

loc-ed ./structions % These features will be added to a personal geodatabase 3 ex7.mdb 4 that has alread been created and has the centerlines, flowpaths, banks and other information%

2or this lab, we will be performing all of these functions onl on the area of the (as 5egas 6ash inside thearea where there are cross sections%

$neffective 2low !rea )efinitionThe $neffective 2low !rea feature class is used to identif areas where water is present but not activelconve ed, for e&ample areas 7ust upstream or downstream of obstructions% $neffective flow areas areentered as pol gonal features% The ineffective flow area pol gon boundaries must intersect cross sectionsin order to appear in the HEC- !" model%

ules8 Ineffective flow areas must intersect cross sections.

34 "elect R"S Geo)etr%, Create R"S (a%ers, Ine**ecti#e &lo+ "reas to create the ineffective flowareas feature class%

24 9ame the ineffective flow areas la er and click . 44 !ctivate the Editor toolbar and select Editor, Start Editing % "elect to edit from the ex7.mdb % ake

sure that the ineffective flow area la er is the target editing la er and digiti+e the ineffective flow areathat might represent an area upstream of a bridge%

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4 "elect Editor, Stop Editing and select 8es to save edits%54 "elect R"S Geo)etr%, Ine**ecti#e &lo+ "reas, ositions to create and populate the ineffective flow

areas table%64 !t the bottom of the !rc ap table of contents window, ou will see a tab called :"ource%;

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@locked =bstruction )efinitionThe entering of blocked obstruction data is identical in process to the entering of ineffective flow areas%

ules8 Blocked obstructions must intersect cross sections.

34 "elect R"S Geo)etr%, Create R"S (a%ers, loc-ed ./structions to create the blockedobstructions feature class%

24 9ame the blocked obstructions la er and click . 44 !ctivate the Editor toolbar and select Editor, Start Editing % "elect to edit from the ex7.mdb % ake

sure that the blocked obstructions la er is the target editing la er and digiti+e the desired blockedobstruction%

4 "elect Editor, Stop Editing and select 8es to save edits%

54 "elect R"S Geo)etr%, loc-ed ./structions, ositions to create and populate the @locked Postionstable%

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64 =pen the @lockedPositions table and start the Editor% $nput the >serElev field to be the desiredelevation for the top of the @locked =bstructions%

(evee !lignment )efinition(evee alignments are entered as pol lines oriented so as to intersect cross section pol lines% ! levee pointis placed at each intersection with a cross section pol line%

ules8 Levee alignments must intersect cross sections.

34 "elect R"S Geo)etr%, Create R"S (a%ers, (e#ee "lign)ent to create the levee alignment featureclass%

24 9ame the levee alignment la er and click . 44 !ctivate the Editor toolbar and select Editor, Start Editing % "elect to edit from the ex7.mdb % ake

sure that the levee alignment la er is the target editing la er and digiti+e the desired levees%

4 "elect Editor, Stop Editing and select 8es to save edits%

54 9e&t, select the !ssign (evee Elevation tool and assign elevations 3*'*A4 along thelevee%

64 "elect R"S Geo)etr%, (e#ees, "ll to create and populate the 1) (evee la er% ake sure to select(eveepoints for :>se (evee Points%;% =therwise, the model will assume the corresponding elevationfrom the T$9%

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(a er "etup(a er "etup is used to specif which la ers are used for the data e&traction%

*% "elect R"S Geo)etr%, (a%er Setup to specif the la ers to be used for each calculation% #enerallthe la er designations should alread be populated%

!ttributing !" 2eature ClassesThe theme attributing process links the !" la ers previousl created to the #$" calculation engine andwrites the results to the appropriate tables%

*% "elect R"S Geo)etr%, Strea) Centerline "ttri/utes, "ll % Click. to create the 1) feature class%.% "elect R"S Geo)etr%, S Cut (ine "ttri/utes, "ll % Click. to create the 1) feature class

#enerating HEC- !" import fileHEC-#eo !" creates the te&t input file that can be imported into HEC- !", which we will do in the ne&tlab%

*% "elect R"S Geo)etr%, E tract GIS ata %.% Click . to close the warning that pops up%1% "elect >" Customar and click . to create the input file%

"R II: $EC'R"S ata I)port and "nal%sis(oading "oftware*% "tart HEC- !" 1%*.% "elect &ile, ;e+ ro

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.% Enter a flow of ??? cfs at the upstream river station% Click to open the stead state flow data

screen% "elect the upstream river station and Click button to add a flow%

Click to appl the data%

1% Click button to specif boundar conditions%

B% "elect critical depth for upstream and downstream boundar conditions and click . %% "elect&ile, Sa#e &lo+ data to save the flow data 3 ex7 4%

'% Enter a file name and title for the flow data and click . %% "elect&ile, E it &lo+ ata Editor to e&it the flow data editor%

un HEC- !" !nal sis

*% Click to save the HEC- !" pro7ect before running the anal sis%

.% Click to open the HEC- !" stead state run dialog bo&%

1% "elect the : i&ed; flow regime radio button%

B% Click button to run theanal sis%

% Click button after the anal sis is complete to close the window%

5iew esults

*% Click the 31-) view4 button to view a model of the river with flow%

.% Click the 3Profile Table4 button to view the results in a table format%

1% Click the 3Cross "ection4 button to view cross section plots%

E&port esults

*% "elect &ile, E port GIS ata to open e&port dialog bo&%.% Change all window options to match the following8

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1% Click to create e&port file%

"R III: $EC GeoR"S ost rocessing

$mport HEC- !" results*% "tart !rc ap.% "elect ools, Custo)i1e select the ool/ars tab and put a check ne&t to HEC-#eo !" to displa the

HEC-#eo !" toolbar% "elect ools, E tensions and make sure that the 1-) !nal st, and "patial!nal st e&tensions are activated%

1% =pen a new file and save as ex7post.mxd.

B% Click on theI)port R"S S & &ile tool and select the output file created in Part $$%% "electR"S Mapping, (a%er Setup % "pecif a new director as post*, browse to the !" e&port file

created above, specif the T$9 location, e&port file from HEC- !" and tin location% Create adirector called :output;% "et the cell si+e to *?

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'% "elect R"S Mapping, Read R"S GIS E port &ile to import the data%% "electR"S Mapping, Inundation Mapping, Water Sur*ace Generation to create a T$9 of the water

surface%

A% Click to add the topo shapefile called uppertopo%D% "electR"S Mapping, Inundation Mapping, &loodplain elineation, Grid Intersection to create a

feature class of the floodplain%

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