Hydro Modeling Workshop

7/24/2019 Hydro Modeling Workshop

http://slidepdf.com/reader/full/hydro-modeling-workshop 1/86

Watershed Modeling

Using ArcView

Timothy N. Loesch2000 Minnesota GISLIS !onsorti"m



Minnesota GISLIS !onsorti"mS#ring Wor$sho#s 2000%

&age 2

Watershed Modeling Wor$sho#

Welcomes and Introd"ctions Who the hec$ am I'

( Wor$ in the )N* MIS +"rea" , GIS Section

( -irst inoled in GIS in /1

( Interest in 3d"cation4 &rogramming and 5ydro

( e,mail , tim.loesch6dnr.state.mn."s

Who the hec$ are yo"'

( Name4 *an$ 7 Serial n"m8er

( +ac$gro"nd +io In9ormation...

( ArcView 3:#erience'




&age ;


!lass !ontent

<eriew 5ydrologic Modeling &rocess in GIS

<eriew o9 )igital 3leation Models

3:#lanation o9 &rocesses and &roced"res Attri8"tes )eried 9rom )3Ms

Im#lementation in ArcView




&age =


!lass Timeta8leAgenda

>00 , >/ , Welcome and Introd"ction

>/ , /0>00 , 5ydrologic Modeling in GIS

( )escri#tion o9 terms( )isc"ssion o9 )igital 3leation Models ?)3M@

/0>00 , /0>/ , &re#rocessing )3Ms

( -illing Sin$s

( )etermining Sin$ )e#th




&age


!lass Timeta8leAgenda /0>/ , /0>;0 , +rea$

/0>;0 , //>;0 , S"r9ace &arameters

( -low )irection( -low Acc"m"lation

( -low Length

//>/ , /2>/ , )elineate Watersheds

( )elineation o9 !ontri8"ting Areas

( )elineation o9 Watersheds and +asins

( S"mmariBing Watershed &arameters




&age C


!lass Timeta8leAgenda

/2>/ , /2>= , L"nch

/2>= , 2>;0 , Ma# <erlay and &redictie

3D"ations 2>;0 , 2>= , +rea$

2>= , =>00 , 3:tending the 5ydrologic Model in

;)

=>00 Wra#,"# and D"estionsE.




&age F


5ydrologic Modeling in GIS

The Sha#e and characteristics o9 the earth%s s"r9ace

is "se9"l 9or many 9ields o9 st"dy.

Understanding how changes in the com#osition o9an area will a99ect water 9low is im#ortant

( What ha##ens when residential deelo#ment occ"rs'

( 5ow does this a99ect the watershed'

( 5ow can these a99ects 8e mitigated' +est management &ractices




&age 1




Minnesota GISLIS !onsorti"m

S#ring Wor$sho#s 2000%&age

To#ogra#hic Ma#s





S#ring Wor$sho#s 2000%&age /0

Traditional watershed delineation has been done

manually using contours on a topographic map.

A watershed 8o"ndary

can 8e s$etched 8y

starting at the o"tlet

#oint and 9ollowing the

height o9 land de9iningthe drainage diides

"sing the conto"rs on a

ma#.

<"tlet &oint





S#ring Wor$sho#s 2000%&age //


Drainage system , The area "#on which water

9alls and the networ$ thro"gh which it traels to

an o"tlet.

Drainage Basin , an area that drains water and

other s"8stances to a common o"tlet as

concentrated 9low ?watersheds4 8asins4

catchments4 contri8"ting area@

Subbasin - That "#stream area 9lowing to an

o"tlet as oerland 9low

Pour Point , A location at which the

contri8"ting area can 8e determined.

Drainage Divide , The 8o"ndary 8etween two

8asins. This is an area o9 diergent 9low.




S#ring Wor$sho#s 2000%&age /2


Stream Network A stream networ$ is

com#osed o9 those areas where concentrated

9low is occ"rring.

Stream <rdering Shree , When two lin$s intersect4 their

magnit"des are added and assigned to the

downslo#e lin$.

Strahler , Stream order only increases when

streams o9 the same order intersect




S#ring Wor$sho#s 2000%&age /;


Curvature - !"rat"re D"anti9ies the sha#e o9

the s"r9ace to "nderstand erosion and drainage

#rocess( cone: ?8"lging@

( concae ?8owing@

&ro9ile !"rat"re , !"rat"re o9 a s"r9ace in

the direction o9 slo#e.( !oncae , slow 9low and de#osition

( !one: , Increasing slo#es and erosion

&lan9orm !"rat"re , !"rat"re o9 a s"r9ace #er#endic"lar to direction o9 slo#e( !one: , )iergent 9low indicating ridges

( !oncae , !onergent 9low indicates alleys




S#ring Wor$sho#s 2000%&age /=


*aster )ata Str"ct"re

M"ch o9 the data we will "se in this class will 8e

H*aster data.

*aster 9ormatted data is m"ch more s"ita8le 9ormany ty#es o9 landsca#e modeling4 incl"ding

hydrologic analysis.

In#"ts s"ch as eleation can only 8e #rocessed as a

raster data set *aster is -aster4 Vector is !orrector




S#ring Wor$sho#s 2000%&age /


*aster

Vector

*eal World




S#ring Wor$sho#s 2000%&age /C


Most *aster data is created 8y *asteriBing e:isting

Vector data

Trans#arent grid is #laced

on ma#.

3ach cell is assigned a

n"meric al"e according to

the dominate attri8"te ty#e

9o"nd in cell.

Integer and *eal al"es are

alid




S#ring Wor$sho#s 2000%&age /F


)igital 3leation Models ?)3M@

To do all o9 this st"99 yo" need data.

A )3M is a digital re#resentation o9 the eleation

o9 a land s"r9ace. J4K and al"e

The USGS is the maor #rod"cer o9 )3M%s in the

Nation




S#ring Wor$sho#s 2000% &age /1


()3M%s consist o9 an array o9 data re#resenting eleation)3M%s consist o9 an array o9 data re#resenting eleation

sam#led at reg"larly s#aced interalssam#led at reg"larly s#aced interals

XX

YY

3L3VATI<N

VALU3S




S#ring Wor$sho#s 2000% &age /


The eleation al"es o9 the )3M can 8e gro"#ed into

interals. 3ach interal is then re#resented 8y a di99erent

gradient color.




S#ring Wor$sho#s 2000% &age 20


Two Scales o9 )3Ms Aaila8le 9or Minnesota />2=4000 Scale

( Leel / , ;0 meter s#acing 3rrors "# to / meters inherent in data

)eelo#ed "sing a"tomated methods 9rom air #hotos

Systematic errors eident as 8anding

Not a##ro#riate 9or hydrologic modeling

( Leel 2 Matches ma# acc"racy o9 />2=4000 scale D"ads

)eelo#ed 8y scanning #"8lished D"ads A##ro#riate 9or hydrologic modeling

/ )egree ?204000@ scale , ; meter s#acing A##ro#riate 9or regional analysis




S#ring Wor$sho#s 2000% &age 2/

Metro Area done 8y the Met !o"ncil

-or more in9ormation loo$ at>

htt#>www.lmic.state.mn."s8ma#0demdem.htm






Watershed Modeling Wor$sho#ArcView 3:ercise O/ , Viewing )3Ms/@ Start ArcView 8y clic$ing on the ArcView Icon on the des$to# that says 5K)*<M<).A&*

2@ This o#ens an ArcView &roect that we will 8e wor$ing in 9or the remainder o9 this wor$sho#. It has the

S#atial Analyst 3:tension Loaded and a co"#le o9 #rede9ined Views and Themes.

;@ <#en the View called )igital 3leation Model.

=@ This View contains a digital eleation model ?)3M@ 9or a small ?F=00 acres@ watershed in *ice co"nty

Minnesota. This View contains = themes>

Watershed +asin , Watershed delineated in /*oads and 5ighways , -rom MN)<T

Streams and )itches , )igitiBed 9rom USGS )igital *aster Gra#hics ?)*GS@

<riginal )3M , A hydrologically ad"sted />2=4000 scale Leel 2 )3M 9rom the USGS with a

cell resol"tion o9 /0 meters.

@ Since we want all o9 this to 8e 8o"nded 8y the incredi8le gra#hics yo" can create "sing GIS let%s start 8y

creating a 5ill,shaded iew o9 the <riginal )3M Theme. To do this ma$e the H<riginal )3M theme actie

and then accessing the Compute Hillshade o#tion in the SURFAC men". Acce#t the de9a"lt al"es o9

ABim"th and Altit"de4 then #ress <P to generate the grid. <nce it%s done #rocessing a new theme will 8e

added to the iew called H5illshade o9 <riginal )3M. T"rn it on and iew it. It%s a #se"do,;) #ers#ectie

8ased on a light so"rce in the "##er le9t. Then T"rn it o99.

Now hide the legend o9 this theme 8y ma$ing it actie and then "sing the !"# men"4 Hide/Show

Legend o#tion.




S#ring Wor$sho#s 2000% &age 2;

Watershed Modeling Wor$sho#ArcView 3:ercise O/ , Viewing )3MsC@ We can now "se the hillshade theme to act as a 8rightness theme 9or o"r eleation.

To do this access the legend editor 9or the H<riginal )3M theme. Then #ress the

Advanced 8"tton in the lower le9t hand corner o9 the Legend 3ditor dialog. -ill o"t

this dialog as it a##ears to the right. Then #ress the <P 8"tton and A##ly the legend.

NI!3 5U5'

F@ T"rn on the other themes in yo"r iew ?*oads and 5ighways4 Streams and )itches4 and Watersheds@. This

shaded relie9 iew is really a great way to iew data. It adds a nice #ers#ectie to the landsca#e and when thewatersheds and streams are dis#layed yo" can do some al"a8le is"al analysis and inter#retation.

1@ Now add a co"#le more themes. There are two images in the !>Q5K)*<M<) s"8directory that yo" sho"ld add

to this View. <ne is a )igital <rtho#hoto R"adrangle ?)<R.TI-@ and one is a scanned />2=4000 USGS D"adrangle

ma# called a )igital *aster Gra#hic or )*G ?)*G.TI-@. To add these to yo"r View doc"ment "se the $%&

men"4 Add Theme o#tion. Ma$e s"re yo" set the Data Source Type selection to IMAGE . Select the two images and

then #ress the <P 8"tton.




S#ring Wor$sho#s 2000% &age 2=

Watershed Modeling Wor$sho#ArcView 3:ercise O/ , Viewing )3Ms

@3dit the #ro#erty sheets o9 these images 8y ma$ing them actie and "sing the !"# men"4 Properties o#tion. Set the name o9 the )<R to H)igital <rtho &hotogra#h and the name o9 the )*G to H)igital *aster

Gra#hic.

/0@ Then re,order these themes so that the )igital <rtho &hoto theme is on the 8ottom o9 the ta8le o9 contents and

the )igital *aster Gra#hic theme is on the to#.

//@ 3dit the legend o9 the )igital *aster Gra#hic &ress the !olorma# 8"tton as shown. Set the color o9 !lass / to

trans#arent. Then t"rn on the image and do some e:#loring 8y Booming in and o"t and #anning aro"nd to learnmore a8o"t o"r #roect area.

/2@ Now Sae Ko"r &roect and minimiBe ArcView.

!olorma# 8"tton

!lass /

Trans#arent





3leation data dra#edon Shaded *elie9

Notice that this watershed is

characteriBed 8y a 9lat "##er

end with 9ew tri8"taries and a

large alley4 more relie94

increased drainage in the

lower stretches.




S#ring Wor$sho#s 2000% &age 2C


&re#rocessing )3Ms )3Ms ty#ically reD"ire some ty#e o9 #re#rocessing

#rior to hydrologic modeling to remoe errors

inherent in the data. This ty#e o9 #rocessing can

greatly increase the acc"racy o9 a )3M. Methods o9 #rod"cing )3Ms rarely incl"de a

H)rainage 3n9orcement Algorithm to remoe

these errors.

&rimary error 9o"nd in )3Ms are HSin$s

( A sin$ is an erroneo"s de#ression created 8y the

)3M inter#olation ro"tine




S#ring Wor$sho#s 2000% &age 2F


/00 /00 /00 /00 /00

/00 F C /00

/00/001/00

/00 /00 /00 /00 /0/

Stream

/00,meter 3leation

conto"r

Sin$ Area

/00 !ell 3leation

!ells containing the conto"r are assigned the al"e o9 the conto"r4

all other cells are inter#olated. Sin$s are always #ossi8le in areas

where conto"rs conerge near a stream.

An e:am#le Sin$






&re#rocessing )3M%s ?contin"ed@ )rainage 3n9orcement

( Using e:isting hydrogra#hic 9eat"res to remoe

these errors is essential to #rod"ce acc"rate

watershed 8asins.( Sin$s are "s"ally small and ca"se drainage 8asins to

8e incorrectly delineated

( I9 a stream is not #resent eleations in sin$ areas are

raised to eleation o9 saddle so that water can drain( I9 a stream is #resent eleations o9 saddles are

lowered to that o9 the sin$ so that water can drain.






&re#rocessing )3M%s ?contin"ed@

ArcView can -ill sin$s 8"t not en9orce other ty#es o9

hydrologic in9ormation

ANU)3M #rogram 9rom A"stralian National Uniersity

which is "sed to en9orce $nown drainage #atterns

ArcIn9o has a ro"tine called T<&<G*I) which is an

im#lementation o9 this so9tware

( M"st 8e care9"l not to remoe real sin$s

( La$e areas sho"ld 8e 9lat

( 5andles #oint or conto"r eleation data




S#ring Wor$sho#s 2000% &age ;0

The 9lat areas in this shaded

eleation model are wetlandsand la$es.





S#ring Wor$sho#s 2000% &age ;/


ANU)3M "ses stream data toen9orce drainage.

Stream data m"st hae correctdirectionality and connectiity.






• This DEM is considered tobe “Hydrologically

Adjusted”




S#ring Wor$sho#s 2000% &age ;;

Watershed Modeling Wor$sho#ArcView 3:ercise O2 , &re&rocessing )3Ms/@ ArcView sho"ld still 8e started and the #roect4 5K)*<M<).A&* sho"ld still 8e loaded. I9 not4 then start

ArcView and <#en the #roect which can 8e 9o"nd in the !>Q5K)*<M<) 9older.

2@ Using the mo"se4 ma$e the theme H<riginal )3M actie.

;@ To remoe sin$s we will "se the DNR "YDR' men" ill Sin!s o#tion ?do it now@. This o#tion will #rocess the

)3M and remoe all sin$s that are 9o"nd. In this im#lementation o9 the 9ill ro"tine yo" do not hae any o#tions 9or

s#eci9ying siBe or area o9 sin$ to remoe. It sim#ly iterates thro"gh the data "ntil all sin$ areas are remoed.

=@ Ko" will 8e #resented with a #rom#t H!reate Sin$ Sha#e9ile and Statistics'. This will 9ind the sin$s that were

9illed and create a sha#e9ile o9 them with statistics that re#resent the siBe and de#th o9 the 9illed areas. Answer K3S to

the #rom#t. Again4 ArcView will 8"BB a little and when done yo" will 8e as$ed to s"##ly a name 9or this new 9ile ,

Ta$e the de9a"lt name SINP&<LK.S5& and ma$e s"re it%s in the !>Q5K)*<M<) 9older.

@ When com#lete4 yo" will hae two new themes added to yo"r iew doc"ment. A Grid theme called H-illed

<riginal )3M and a #olygon theme called HSin$s with Statistics. T"rn o99 all yo"r other themes and t"rn on the

HSin$s with Statistics sha#e9ile. See anything' There%s one small #olygon in the center o9 the watershed. To iew thestatistics4 ma$e the HSin$s with Statistics actie and then "se the !"# men"4 Ta"le o#tion to o#en the ta8le. Ko"

will see that the sin$ is F00 sD"are meters in siBe and has a de#th o9 / meter.

That%s #retty good 8"t remem8er4 this is a hydrologically ad"sted )3M.




S#ring Wor$sho#s 2000% &age ;=

Watershed Modeling Wor$sho#ArcView 3:ercise O2 , &re&rocessing )3Ms

C@ Now t"rn o99 all yo"r themes and t"rn on the H-illed <riginal )3M theme and ma$e it actie. Ko"

#ro8a8ly don%t notice m"ch here and it%s not the same color scheme as the original. Let%s create a new legend

"sing the DNR "ydro men"4 Interval Legend o#tion.

Use an interal o9 /4 a +ase al"e o9 20 and a Ma: Val"e o9 ;F

and #ress the <P 8"tton.

Then select a color scheme o9 interest. <ne o9 my 9aorites is H-"ll S#ectr"m 8"t yo" can choose yo"r own

or try a 9ew i9 yo"%d li$e

1@ Wow4 edit the legend and change the N< )ata al"e color to trans#arent. Then "se the !"# men"

Hide/Show Legend o#tion to hide that really long legend and ma$e some room on o"r ta8le o9 contents.

Then4 moe the two new themes down a co"#le o9 notches on the Ta8le o9 !ontents so that yo" can dis#lay

the ector themes ?*oads and Watersheds@ on to# o9 them.

@ Ko" now hae a de#ressionless )3M4 one that can 8e "sed 9or 9"rther 5ydrologic Analysis. We want to

sae this 9ile so4 ma$e the H-illed <riginal )3M theme actie and then "se the !"# men" Save #ata

Set o#tion to sae this 9ile to !>Q5K)*<M<)Q)3M-ILL.

/0@ Now sae yo"r #roect




S#ring Wor$sho#s 2000% &age ;

Generating S"r9ace &arameters -low across a s"r9ace will always 8e in the stee#est

down,slo#e direction

Pnown as H-low )irection this is the 8asis o9 all

9"rther watershed modeling #rocesses.

<nce the direction o9 9low is $nown it is #ossi8le to

determine which and how many cells 9low into any

gien cell

This in9ormation is "sed to determine watershed

8o"ndaries and stream networ$s.





S#ring Wor$sho#s 2000% &age ;C


S(o)e - Many o9 the #arameters that

we will disc"ss and generate in this

wor$sho# are 8ased on slo#e. Us"ally calc"lated on a ;:; window with

the center cell 8eing the target cell.

Slo#e is calc"lated 9rom the center cell to

each o9 the 1 neigh8ors

Greatest slo#e is assigned to the center

cell -low direction is that wayE..

/2 /; /;

// /0

1 /0

Target !ell

/0




S#ring Wor$sho#s 2000% &age ;F

Generating S"r9ace &arameters , -low )irection

In ArcView S#atial Analyst4 the o"t#"t o9 a -low

)irection is a grid whose al"es can range 9rom /

to 2 8ased on the direction water wo"ld 9low

9rom a #artic"lar cell. The cells are assigned al"ed

as shown 8elow.


;2 C= /21

/C /1 = 2Target !ell





Generating S"r9ace &arameters , -low )irection

I9 a cell is lower than its eight neigh8ors4 that cell is

gien the al"e o9 its lowest neigh8or and 9low is

de9ined towards this cell.

I9 a cell has the same slo#e in all directions the

9low direction is "nde9ined ?la$es@

I9 a cell has the same slo#e in m"lti#le directions

and is not #art o9 a sin$ the 9low direction iscalc"lated 8y s"mming the m"lti#le directions





S#ring Wor$sho#s 2000% &age ;

-low )irection


/00 /00 /00 /00 =

/00 F C /00

/00/001/00

/00 /00 /00 /00 /0/

2 2 2 / /21

/ / / /21C=

;2C=/21/21/21

/21 C= C= ;2 10

<riginal S"r9ace -low )irection S"r9ace




S#ring Wor$sho#s 2000% &age =0

-low )irection





S#ring Wor$sho#s 2000% &age =/

Generating S"r9ace &arameters , -low Acc"m"lation I9 we $now where the 9low is going then we can

9ig"re o"t what areas ?cells@ hae more water 9lowing

thro"gh them than others.

+y tracing 8ac$wards "# the 9low direction grid we

can 9ig"re the n"m8er o9 cells 9lowing into all cells in

a st"dy area

Acc"m"lated 9low is calc"lated as the acc"m"lated

n"m8er o9 all cells 9lowing into each downslo#e cell.





S#ring Wor$sho#s 2000% &age =2

Generating S"r9ace &arameters , -low

Acc"m"lation

-or an acc"m"lation s"r9ace the al"e o9 each cell

re#resents the total n"m8er o9 cells that 9low intoan indiid"al cell

!ells that hae high acc"m"lation are areas o9

concentrated 9low and may 8e "sed to identi9y

stream channels.





S#ring Wor$sho#s 2000% &age =;

2 2 2 / /21

/ / / /21C=

;2C=/21/21/21

/21 C= /00 ;2 10

-low )irection S"r9ace


0 0 0 0 /1

0 ; 1 /0

00220

0 0 0 0 0

-low Acc"m"lation S"r9ace




S#ring Wor$sho#s 2000% &age ==


-low Acc"m"lation S"r9ace




S#ring Wor$sho#s 2000% &age =

Generating S"r9ace &arameters , -low Length Another #arameter that can 8e calc"lated is 9low

length

-low length is de9ined as the length o9 the longest

9low #ath within a drainage 8asin or watershed. This

meas"re is o9ten "sed to calc"late the time o9

concentration o9 a 8asin.

ArcView calc"lates the 9low length 9or each cell

within the 8asin. The cell al"es re#resent the length

o9 9low to an o"tlet 9rom that #oint.





S#ring Wor$sho#s 2000%&age =C

2 2 2 / /21

/ / / /21C=

;2C=/21/21/21

/21 C= /00 ;2 10

-low )irection S"r9ace

/==.C //=.C 1=.C ;0 0

/;2.; /02.; F2.; =2.;;0

1=.CF2.;1=.C//=.C/==.C

/C. /2C. //=.C /2C. 0

-low Length S"r9ace


Ass"ming ;0 meter sD. cells




S#ring Wor$sho#s 2000%&age =F

-low Length S"r9ace





S#ring Wor$sho#s 2000%&age =1

The Whole &rocess , a -lowchart


W t h d M d li W $ h




S#ring Wor$sho#s 2000%&age =

Watershed Modeling Wor$sho#ArcView 3:ercise O; , Generating Land S"r9ace &arameters/@ ArcView sho"ld still 8e started and the #roect4 5K)*<M<).A&* sho"ld still 8e loaded. I9 not4 then start ArcView

and <#en the #roect which can 8e 9o"nd in the !>Q5K)*<M<) 9older. Ma$e s"re that the H)igital 3leation Model

View is o#en and actie.

2@The 9irst ste# in this #rocess is to create the -low )irection theme. We "se an eleation theme as o"r 8ase so ma$e

the H-illed <riginal )3M theme actie and then "se the DNR "YDR' men" low #irection o#tion to create this

grid. The com#"ter will whir 9or awhile and then add a new theme called H-low )irection. T"rn this theme on. Notice

the cell al"es in the legend. *emem8er that / re#resents east 9low direction etc. Ko" may also notice that this is really

showing "s the as#ect o9 the landsca#e. 3dit the legend 9or this theme and then #ress the Load 8"tton to load the legend

9ile> !>Q5K)*<M<)Q-L<W)I*.AVL. Use the de9a"lts and a##ly the legend.

=@ Now we%re ready to create the -low acc"m"lation grid. To do this4 ma$e the H-low )irection grid actie and then

"se the DNR "YDR' men" low Accumulation o#tion to create this theme. Ko" will then 8e reD"ested to enter a

H-low Acc"m"lation Weight Grid. We don%t hae one at this time so #ress the !AN!3L 8"tton. At this #oint the

com#"ter will #rocess 9or a 8it and then add a new theme to yo"r View called H-low Acc"m"lation ?s"r#rise@.

@ T"rn on this grid and hae a loo$. All yo" really see in this dis#lay is one area that loo$ li$e they co"ld 8e stream

channel. What yo"%re loo$ing at here is an arti9act o9 the legend. To create a 8etter loo$ing iew o9 this s"r9ace we canmodi9y the legend to show more o9 the concentrated 9low networ$. To do this create a legend that has the 9ollowing

classes>

0 , /00

/00 , /0000

/0000 , 2000

2000 , 0000

0000 , 2C0000




S#ring Wor$sho#s 2000%&age 0


ArcView 3:ercise O; , Generating Land S"r9ace &arametersThen coloriBe the classes and a##ly the legend. Ko" sho"ld see a m"ch 8etter dis#lay o9 the drainagechannels in the landsca#e. Let%s ass"me that any cell with less than a /00 cell acc"m"lation is most li$ely

oerland 9low so ma$e this class trans#arent in yo"r legend. Also ma$e the N< )ATA class sym8ol

trans#arent.

C@ Now let%s calc"late 9low length 9or eery cell in the watershed. To do this ma$e s"re that the H-low

)irection theme is actie and then #ress the DRN "YDR' men" low Length o#tion.

F@ Ko" will 8e as$ed i9 yo" want to calc"late the 9low length to an o"tlet. In other words4 do yo" want

ArcView to 9ind an o"tlet and calc"late 9low length 9rom there. The answer in this case is yes. ArcView will

then create the 9low length grid called H)ownstream -low Length and add it to yo"r iew doc"ment.

1@ 3:amine the grid. What does this tell yo"' Sae yo"r #roectEE

@ Let%s loo$ at how stream ordering can 8e created 9rom this H-low Acc"m"lation theme. To sae some

time I%e already created these data sets. Ko" will 9ind two Grid )ata sets in the !>Q5K)*<M<)s"8directory4 one called ST*A5L3* and one called S5*3V3. Add these two themes to yo"r View

)oc"ment. Notice the di99erence 8etween the two systems4 most nota8ly the di99erence in ma:im"m stream

order. Ko" co"ld conert these to Vector re#resentations o9 9low channels i9 desired.




S#ring Wor$sho#s 2000%&age /

Watershed Modeling Wor$sho#ArcView 3:ercise O; , Generating Land S"r9ace &arameters

/0@ Another way to is"aliBe 9low #aths is to create a ector ersion o9 them. )o this "sing the DNR 5ydromen" Create Stream $etwor! option. Ko" will 8e reD"ired to enter a -low Acc"m"lation theme4 a -low

)irection Theme4 and a 9low acc"m"lation threshold. -or the -low acc"m"lation threshold "se a al"e o9 2.

//@ Sae the 9ile "sing the name #roided.

/2@ <nce com#lete a new theme will 8e added to yo"r iew called Stream Networ$ Sha#e , ?2@. T"rn it on.

This shows yo" all 9low #aths that drain an area o9 2 or more cells ?20 sD"are meters@.

I9 yo" loo$ close4 yo"%ll see that these drainage #aths 9ollow the 9low direction gridE..

/;@ I9 yo"%d li$e yo" can create another one o9 these and try a threshold o9 /0 and see what ha##ensE

/=@ Sae yo"r #roect and minimiBe ArcViewE.





Generating Watersheds and !atchments

Now yo" are ready to start delineating watershed

8asins

Watersheds or !atchment areas are the 8asis 9or many

hydrologic analysis

Watersheds can 8e created 9or any s#ot in a dataset.

( !"lerts4 8ridges4 ga"ging stations etc.

( &oints can 8e interactiely selected 8y the "ser or yo"

can s#eci9y a minim"m catchment siBe.

( &oints 8ecome the lowest #oint on the 8o"ndary o9 the

watershed and are there9ore re9erred to as #o"r #oints





S#ring Wor$sho#s 2000%&age ;

Generating Watersheds and !atchments &o"r #oints can 8e in#"t as an entire theme or they

can 8e created 8y selecting a #oint on the screen.

Using a -low Acc"m"lation Theme yo" can s#eci9y a

minim"m siBed watershed and let S#atial Analyst

a"tomatically generate watersheds 9or an entire area.

( Generally not "se9"l 9or most #"r#oses

( Ar8itrarily assigns watershed o"tlets

( 5as tro"8le assigning le9toer areasE.





S#ring Wor$sho#s 2000%&age =

&o"r &oint !ontri8"ting Area







Minim"m !atchment Area 000 cells Minim"m !atchment Area /0000 cells





S#ring Wor$sho#s 2000%&age C

Watershed Modeling Wor$sho#ArcView 3:ercise O= , Watershed )elineation/@ ArcView sho"ld still 8e started and the #roect4 5K)*<M<).A&* sho"ld still 8e loaded. I9 not4 then start

ArcView and <#en the #roect which can 8e 9o"nd in the !>Q5K)*<M<) 9older. Ma$e s"re that the H)igital

3leation Model View is actie and o#en.

2@ What we%ll do 9irst is create some watersheds 9or the entire st"dy area 8ased on a co"#le o9 #oints that are stored in

a 9ile. These #oints re#resent stream ga"ges on the watershed and can 8e 9o"nd in the 9ile

!>Q5K)*<M<)QGAUG3S.S5&. Add this theme to yo"r #roect and t"rn it on.

;@ To create the watersheds4 ma$e the HGAUG3S.S5& theme actie and then "se the DNR "YDR' men"

%atershed &rom Points o#tion. Ko" will then 8e reD"ested to s"##ly the grid theme that re#resents the -low

)irections. Select the H-low )irection theme 9rom the list and #ress the <P 8"tton.

Ko" will 8e #rom#ted with a H!onersion 3:tent window. Set the <"t#"t Grid 3:tent to HSame as <riginal )3M

and set the H<"t#"t Grid !ell SiBe to /0.

=@ Ko" will then 8e reD"ired to s#eci9y the -ield in the GAUG3S Sha#e9ile who%s al"es will 8e "sed to assign I)%s

to the new watersheds. Use the I) -ield in this case.

@ Gie the o"t#"t 9ile a name. Ta$e the de9a"lt in this case. The com#"ter will cran$ the n"m8ers 9or a while and

then add a new theme to the iew called H!alc"lated Watersheds. Ko" will see that ArcView has created ; 8asins 9or

this area 8ased on the #oints in the 9ile. To get a 8etter iew o9 them edit the legend and "se the Advanced 8"tton to

s#eci9y a 8rightness theme 9or this theme. Use the theme H5illshade o9 <riginal )3M as the 8rightness theme. Then

a##ly the legend and iew the data. Wow What a co"ntry Now t"rn o99 that theme.




S#ring Wor$sho#s 2000%&age F

Watershed Modeling Wor$sho#ArcView 3:ercise O= , Watershed )elineation

C@ As disc"ssed in the lect"re4 yo" can also interactiely create watershed 8y selecting a #oint o9 interest. To do this

we need to "se the %atershed Tool ?the tool with a HW in it@. Select the tool and then #ress the mo"se on the View

on any location on the ma# that yo" want to see a drainage area. Ko" will 8e reD"ested to select a -low )irection

and -low acc"m"lation grid once yo" select an area and a watershed will 8e generated and a theme added to yo"r

iew doc"ment 9or that theme. Try it and t"rn on the theme.

F@ Inter#retations' What do yo" thin$' )id it #rod"ce the watershed yo" e:#ected' This #rocess is *3ALLKsensitie to where yo" #lace the #oint. I9 it%s not on a 9low #ath4 then it won%t create a watershed yo" e:#ect. To hel#

this #rocess4 T"rn on the -low Acc"m"lation theme to show yo" where the 9low #aths are. Ko" may need to Boom in

D"ite a ways in order to select a #oint that 9alls on a 9low #ath.

1@ Try it 9or some other locations in the st"dy area. Try creating a catchment area a8oe a #oint where a road crosses

a stream. In the words o9 the in9amo"s +art Sim#son4 H!ool Man.

@ Try "sing the *ain)ro# Tool. This tool will 9ollow the 9low direction 9rom the #oint chosen to the o"tlet. Ko" cansee where the water will 9low i9 it 9ell on that s#ot. Use the *ain)ro# Tool ?the Tool with an H* in it@ to select a

#oint on the View4 yo" will 8e reD"ested to s"##ly a -low )irection Grid and the 9low#ath will 8e created.

/0@ Sae yo"r #roect and e:#eriment a 8it.





S"mmariBing In9ormation 9or Watersheds. <nce yo" hae created watersheds 9or an area many times

yo" want to s"mmariBe other land s"r9ace aria8les that

9all within the watersheds.

This ty#e o9 In&ormation deried 9rom raw data increasesyo"r 'nderstanding a system and how changes to that

system ?land "se etc@ a99ect the #rocess.

Two ty#es o9 re#orts can 8e created( Statistical s"mmaries o9 n"meric data ?eleation4 #reci#@

( !ross,ta8"lations o9 Nominal )ata ?land "se4 soil ty#es@

This can 8e done easily with ArcView.






S"mmariBing In9ormation 9or Watersheds.


Statistical S"mmary

!ross,Ta8"lation




S#ring Wor$sho#s 2000%&age C0

S"mmariBing In9ormation 9or Watersheds. This ty#e o9 in9ormation can then 8e "sed in re#orts or 9ed

to other analytical #rograms 9or 9"rther analysis.

( 5ydrologic models

53!4 5ydro!A)4 SW**+4 othersE.( Gra#hs4 charts can 8e "sed to iew data

When "sing e:isting #rograms create a s"mmary o9

reD"ired in#"ts and see i9 yo" can generate them 9rom the

s#atial layers aaila8le to yo" ia GIS.

More and more is 8eing done to inter9ace GIS and

5ydrologic models.





S#ring Wor$sho#s 2000%&age C/





S#ring Wor$sho#s 2000%&age C2





S#ring Wor$sho#s 2000%&age C;

Watershed Modeling Wor$sho#ArcView 3:ercise O , S"mmariBing Watershed/@ ArcView sho"ld still 8e started and the #roect4 5K)*<M<).A&* sho"ld still 8e loaded. I9 not4 then

start ArcView and <#en the #roect which can 8e 9o"nd in the !>Q5K)*<M<) 9older.2@ What we%ll do 9irst is s"mmariBe some in9ormation 8y watershed. Let%s start with land "secoer. In the

!>Q5K)*<M<) s"8directory yo" will see a G*I) theme called LUL!J*A; that contains this

in9ormation. Add this theme to the View doc"ment and then edit the legend and load the legend 9ile

!>Q5K)*<M<)QLUL!J*A;.AVL. Then a##ly the legend and iew the data.

;@ Since this is nominal data ?the n"m8ers re#resent land "se classes@ yo" can%t #er9orm statistics4 yo" can

only do a cross,ta8"lation. To do this "se the ANA*YS%S men" Ta"ulate Areas o#tion. We%ll "se the

LUL!J*A; Theme as o"r *ow theme with the )3S! 9ield as the *ow -ield. We want to s"mmariBe 8y

watershed so choose the H!alc"lated Watersheds theme yo" created d"ring 3:ercise = or as shown 8elow.

When yo" are done4 #ress the <P 8"tton. At this time a ta8le will 8e created that shows the res"lts.

*emem8er that the "nits here are in sD"are meters.




S#ring Wor$sho#s 2000%&age C=

Watershed Modeling Wor$sho#ArcView 3:ercise O , S"mmariBing Watershed@ !lose this ta8le and ma$e s"re that yo"r View doc"ment is actie

C@ Now let%s create some statistics 9or the eleations within each o9 the watersheds. To do this ma$e yo"rH!alc"lated Watersheds theme actie and then "se the ANA*YS%S men" Summari(e )ones o#tion. Ko"

will 8e #resented with two in#"ts yo" need to #roide ?see e:am#les 8elow@

A@ &ic$ Theme containing aria8le to S"mmariBe> *illed +riginal #EM,

+@ Select Statistic to !hart> Area

F@ A new ta8le and a new chart will 8e created. What do yo" thin$' What co"ld yo" do with these' <9 co"rse

yo" wo"ld #retty them "# and ma$e them inter#reta8le 8"t 9or now4 we%ll "st moe on...

1@ That%s all 9ol$s Sae yo"r #roect and D"it ArcView.




S#ring Wor$sho#s 2000%&age C


Ma# <erlay is the one o9 the 8read,and,8"ttera8ilities o9 GIS

!ell,8y,cell oerlay is the #rocess o9 ta$ing two or

more raster 9iles and com#aring the al"es o9 eacho9 the 9iles4 cell 8y cell.

The res"lt is a ma# that identi9ies ma# coincidence

with the al"es o9 the o"t#"t 9ile 8ased on some

"ser,de9ined #rocess.




S#ring Wor$sho#s 2000%

&age CC


*aster -iles can also s"##ort HMa#wide <erlays Ta$e a mathematical eD"ation and H#l"nge it

thro"gh a set o9 registered ma# layers.

3ach ma# layer is considered a aria8le 3ach location is considered a case

3ach al"e considered a meas"rement

Very im#ortant st"99 9or modelers





&age CF


Using the -low )irection and -low Acc"m"lation #rocesses it is easy to com#"te a mass 8alance 9or

each cell in terms o9>

S & , I , - , 3 where4( S s"r#l"s water #er cell

( & in#"t #reci#itation

( - in9iltration

( 3 3a#oration !"m"latie 9low oer the net is then o8tained 8y

acc"m"lating S oer the -low )irection grid.





&age C1


&redictie eD"ations are another way to "se ma#oerlay. The Water Aaila8le 9or *"no99 eD"ation is "sed 8y hydrologists "se

to calc"late the amo"nt o9 water that will 8e aaila8le 9or r"no99 9or

a s#eci9ic rain9all eent4 8ased on the ty#e o9 soil and land coer

#resent at a location. Using this in9ormation yo" co"ld #redict the amo"nt o9 water

aaila8le 9or r"no99 at eery cell in a watershed

This co"ld then 8e acc"m"lated across a 9low direction s"r9ace Very

im#ortant to a road engineer who has to design a road that crosses

that drainage. A9ter all4 i9 they #"t in a c"lert that is too small thereco"ld 8e #ro8lems.

h d d li $ h





&age C

Watershed Modeling Wor$sho#ArcView 3:ercise OC , !alc"lating Water Aaila8le 9or *"no99 &*<3!T <V3*VI3W

Let%s ass"me that yo" are managing a set o9 watersheds in *ice co"nty and yo" wanted to determine the

total amo"nt o9 s"r9ace water r"no99 that co"ld 8e #otentially deried 9rom these watersheds. <ne o9 the

classic methods o9 #rod"cing this ty#e o9 in9ormation is to "se the Nat"ral *eso"rce !onseration Serice%s

?N*!S@ HWater Aaila8le 9or *"no99 eD"ation. This eD"ation #redicts the amo"nt o9 water that will 8e

aaila8le as r"no99 8ased on the land coer and soil conditions4 #resent at a certain s#ot4 8ased on a gien

rain9all amo"nt.

That is4 i9 I get an inch o9 rain4 how m"ch can I e:#ect to #rod"ce as r"no99 on a corn9ield in clay soils'

The landcoersoil in9ormation is 8ased on a al"e called the !"re *"no99 N"m8er or !N. The !N is

deried 8y e:amining the 5ydrologic soil gro"#ing o9 a soil and the landcoer #resent. !N al"es range

9rom 0 /00 and are an indication o9 the a8ility o9 the soillandcoer mi: to a8sor8 moist"re. !oncrete has a

al"e close to /00. Sandy soils coered 8y 9or8es hae al"es in the ;0%s.

These al"es are deried 9rom ta8les #rod"ced 8y the N*!S that com#are landcoer with hydrologic soilgro"#s. 5ydrologic soil gro"# al"es range 9rom A ). HA soils are light4 sandy #oro"s4 well drained soils

while H) soils are heay4 clayey4 com#act4 and #oorly drained.

W h d M d li W $ h





&age F0

Watershed Modeling Wor$sho#ArcView 3:ercise OC , !alc"lating Water Aaila8le 9or *"no99

To #redict the total water aaila8le 9or r"no99 yo" need to "se the 9ollowing eD"ation>

R ?sDr?# 0.2 ?/000c /0@@@ ?# 0.1 ?/000c /0@@

Where> R total water aaila8le 9or r"no99

# #reci#itation

c c"re n"m8er

Th"s4 at a minim"m we need two ma# aria8les4 &reci#itation and !"re n"m8er. <nce we hae these two

grids the eD"ation can 8e H&l"nged thro"gh these ma# layers to #rod"ce an o"t#"t layer that shows the

water aaila8le 9or r"no99 at each location in the watershed.

The 9lowchart on the ne:t #age ill"strates the 9low o9 control 9or this analysis. -lowcharts are "se9"l 8eca"se

yo" can ma# o"t the #rocess4 the commands and 9iles yo" will need4 and those yo" will create4 d"ring the

analysis.

Sometimes analysis can get con9"sing 8eca"se o9 the n"m8er o9 9iles created d"ring the #rocess. This 9ile

#roli9eration can 8e hard to manage i9 yo" don%t hae a #lan. <n,the,9ly #lanning is not the 8est way.

As yo" go thro"gh the analysis4 #rint the name o9 the 9iles yo" create on the 9lowchart sheet. The

doc"mentation is im#ortant.





&age F/

W h d M d li W $ h





&age F2

ArcView 3:ercise OC , !alc"lating Water Aaila8le 9or *"no99

/@ ArcView sho"ld still 8e started and the #roect4 5K)*<M<).A&* sho"ld still 8e loaded. I9 not4 thenstart ArcView and <#en the #roect which can 8e 9o"nd in the !>Q5K)*<M<) 9older.

2@!lose the H)igital 3leation Model View and o#en the H*"no99 View and hae a loo$. Ko" will see three

o9 the 9o"r themes that we need to do this #roect. The H&reci#itation theme re#resents rain9all 9rom a

#artic"lar storm4 H5ydrologic Soil Gro"# re#resents the hydrologic soil gro"# 9or the soils in the watershed

and HLand Use and !oer is the land coer in the 8asins. Loo$ at the #ro#erty sheets o9 these themes to get

an idea o9 their so"rces and iew the data to get an idea o9 their s#atial distri8"tion.

;@ Loo$ at the 9low chart4 the 9irst thing we need to do is create the c"re r"no99 n"m8er grid 8y com8ining

the 5ydrologic Soil Gro"# and Land Use and !oer themes. To do this "se the ANA*YS%S+ Map Calculator

o#tion. 3nter the 9ollowing ma# eD"ation>

5ydrologic Soil Gro"#X.!om8ine? Y Land Use and !oerX Z @

This command creates a new grid 8y #er9orming a s#atial coincidence oerlay analysis o9 two or more grids.The al"es in the new grid re#resent Bones o9 "niD"e com8inations o9 al"es in the in#"t grids. A new

theme4 called HMa# !alc"lation / will 8e added to yo"r View.







&age F;


=@ <#en the ta8le 9or this new theme 8y ma$ing the theme actie and "sing the !"#+ Ta"le o#tion. This

ta8le shows yo" that there are 21 "niD"e com8inations o9 5ydrologic soil gro"#s and Landcoer. 3ach o9

these soillandcoer com8inations is then assigned a al"e o9 !"re r"no99 8ased on a ta8le yo" can get 9romthe N*!S.

Normally yo" wo"ld edit the ta8le4 add a new item called !N ?9or c"re n"m8er@ and then enter in the al"es

8ased on the soil and landcoer com8ination.

To sae time I hae already created this 9ile so yo" can ma$e this new theme actie and then "se the D%!+

#elete Theme command to remoe the theme. Then add a G*I) theme "sing the grid> !>Q5K)*<M<)Q!N.Then edit the legend o9 this theme and create UniD"e Legend "sing the VALU3 9ield. This 9ield stores the

al"es o9 c"re n"m8er 9or each cell.

@ Now we%re ready to do the analysis. To do this we will "se the ANA*YS%S+ Map Calculator o#tion.

Ko" need to enter the eD"ation 9or water aaila8le 9or r"no99 as>

? &reci#itationX , 0.2.AsGrid ?/000.AsGrid !NX , /0.asgrid@@.sDr ?&reci#itationX 0.1.AsGrid

?/000.AsGrid !NX , /0.AsGrid@@

+e care9"l when yo" enter this eD"ation. It has to 8e "st right 9or it to wor$ #ro#erly. Use the mo"se to enter

as m"ch o9 this in9ormation as yo" can. Ko" will need to add some #arenthesis 8y hand to ma$e it wor$.

<nce yo" hae entered the eD"ation #ress the Evaluate command to e:ec"te the analysis.

g #






&age F=


C@ The machine will ch"c$ away 9or a while ?i9 yo" entered the eD"ation #ro#erly@ and when com#lete will

add a new theme to the iew. This theme4 called HMa# !alc"lation /4 contains cell%s whose al"es

re#resent the total amo"nt o9 water that will 8e aaila8le 9or r"no99 8ased on the in#"t rain9all eent.

3dit the #ro#erties o9 this theme and name it HWater Aaila8le 9or *"no99. 3dit the Legend and classi9y and

sym8oliBe as yo" see 9it.

This grid4 in itsel94 is an im#ortant #iece o9 in9ormation. It is o8io"s that in the "##er reaches o9 the

watersheds there is a 9ew areas that hae a high #otential 9or soil erosion 8eca"se they hae a high #otential

water aaila8le 9or r"no99 al"e.

F@ Let%s ta$e it a ste# 9"rther. *emem8er the -low Acc"m"lation grid that we created in earlier e:ercises. In

those e:ercises we created the acc"m"lation grid where the grid al"es re#resented the n"m8er o9 cells that

wo"ld 9low thro"gh it. Well4 the -low Acc"m"lation command can ta$e a weight grid and acc"m"late the

al"es o9 the cells in the weight grid and assign that al"e to the cells in the o"t#"t grid.

To create the Weighted -low acc"m"lation theme we need the -low )irection theme that was created earlier

in this Wor$sho#. Let%s get that Theme. <#en the View H)igital 3leation Model and ma$e the H-low

)irection theme actie and then "se the D%! men" Cop- o#tion to co#y this theme to the ArcView

!li#8oard.

g #






&age F


Now close the H)igital 3leation Model View and ma$e the H*"no99 View actie and then #aste the theme

in the cli#8oard to this View "sing the D%! men" Paste o#tion.

Now4 ma$e the -low )irection theme actie and then r"n the DNR "YDR'+ low Accumulation command.

Ko" will then 8e as$ed to #roide an Acc"m"lation weight grid. Use the HWater Aaila8le 9or *"no99 Grid.

The res"lting theme is a grid whose cells are coded 8ased on the acc"m"lated 9low as water aaila8le 9or

r"no99. <9 co"rse4 this is a highly idealiBed iew o9 the world and does not 9actor in things li$e 9riction4 9lowlength4 timing and #onding 8"t it is a start.

1@ Now close all o9 yo"r o#en ArcView windows4 sae yo"r #roect and minimiBe ArcView.







&age FC


There are a ariety o9 other ty#es o9 hydrologicaria8les that can 8e generated "sing )3Ms.

-low )irection Grids are the 8asis 9or a wide

range o9 dynamic modeling tools These can 8e calc"lated "sing ArcView and

S#atial Analyst

See an )e"rsen and +"rro"gh ?/1@ 9or more

in9ormation.






&age FF


Wetness Inde: wetness inde: ln?As tanB@4

where>

(

As !ontri8"ting !atchmentArea in meters sD"ared

( B Slo#e o9 cell meas"red in

degrees






&age F1


The Stream &ower Inde: w As tanB

This is directly #ro#ortional to the

stream #ower

& #gD tan+ where>( # density o9 water4

( g acceleration d"e to graity

( D oerland 9low discharge #er "nit

width

An indicator o9 erosie #ower o9

oerland 9low






&age F


The Sediment Trans#ort Inde: t As 22./;X[0.C sinB 0.01CX[/.;

This inde: characteriBs the #rocess o9

erosion and de#osition

&resents the e99ects o9 to#ogra#hy on soilloss

!an ary along the length o9 a stream






&age 10


These tools are "se9"l 9or D"anti9ying the #ro#erties andcharacteristics o9 the watershed yo" ha##en to 8e

inestigating.

May hel# 9ind areas 9or wetland restoration or areas where

8an$ sta8iliBation is needed *elate stream #rocesses to 9ish distri8"tions

&lan 9ish str"ct"res and ha8itat im#roements

Meas"re the e99ects o9 management #ractices on the

watershed.






&age 1/

ArcView 3:ercise OF , !alc"lating More Land S"r9ace

Varia8les

/@ ArcView sho"ld still 8e started and the #roect4 5K)*<M<).A&* sho"ld still 8e loaded. I9 not4 then

start ArcView and <#en the #roect which can 8e 9o"nd in the !>Q5K)*<M<) 9older.

2@ Ma$e s"re that the H)igital 3leation Model View is o#en and actie. We%ll e:#eriment with some o9 the

new tools we%e disc"ssed in the lect"re #art o9 this wor$sho#. *ather than cl"ttering "# an already cl"ttered

iew we%ll ma$e a new iew and co#y the H-illed <riginal )3M into that iew. )o the 9ollowing>

a@ ma$e the H-illed <riginal )3M Theme actie 8@ Use the D%! men" Cop- o#tion to co#y the theme to the cli#8oard

c@ Ma$e the &roect Window actie and create a new View.

d@ Use the D%! men" Paste o#tion to #aste the theme to this new View

e@ 3dit the View%s &ro#erty sheet and name the View H3:tended Varia8les

;@ Now ma$e the Wetness Inde: Ma# 8y ma$ing the H-illed <riginal )3M Theme actie and then

accessing the "YDR' men" %etness Inde. o#tion. Ko"r little silicon s"8ordinate will d"ti9"lly start

#rocessing and when done4 add a new theme called HWetness Inde: to yo"r View. <#en the Theme%s

#ro#erty sheet and iew the comments4 they tell yo" the eD"ation "sed 9or this analysisE.

3dit the legend to ma$e it isi8le. Ko" co"ld generate some statistics 9rom this 8a8yE..

g #






&age 12

ArcView 3:ercise OF , !alc"lating More Land S"r9ace

Varia8les

=@ Now ma$e the Stream &ower Inde: Ma#. )o this 8y ma$ing the H-illed <riginal )3M Theme actie and

then accessing the "YDR' men" Stream Power Inde. o#tion. This will ta$e a 8it as the machine needs to

calc"late a 9ew tem#orary aria8les. When done a new theme called HStream &ower Inde: will 8e added to

yo"r View. Again4 iew the #ro#erty sheet and see what eD"ation was "sedE..

3dit the legend to ma$e it isi8le.

@ Now ma$e the Sediment Trans#ort Inde: Ma#. )o this 8y ma$ing the H-illed <riginal )3M Theme actie

and then accessing the "YDR' men" Sediment Transport Inde. o#tion. The machine will cr"nch away and

create this deried #rod"ct. <nce it%s done it will add a new theme called HSediment Trans#ort Inde:. View

the &ro#erty sheet.

C@ Now4 close the o#en windows in ArcView4 sae yo"r #roect and minimiBe ArcView






&age 1;


Where is this all going' More and more e99ort is 8eing #"t into integration

o9 5ydrologic Models and GIS

Seeral We8 sites are aaila8le( htt#>www.ce."te:as.ed"#ro9maidment

( htt#>www.ciesin.colostate.ed"US)Ahydrologymodels\so9t.html

( htt#>www.ecgl.8y".ed"wms.htm

( htt#>www.esri.comnewsarc"serarc"ser=1hydrology.html

(

htt#>www.esri.comli8rary"sercon9#roc1&*<!33)T<=00&A&=00&=00.5TM






&age 1=


Where is this all going' *ight now most e99orts are 8eing #"t into so9tware

that 8ridges the ga# 8etween e:isting so9tware and

GIS.






&age 1


Seeral endors and Uniersities are #"ttingtogether integration So9tware

3S*I has a really good !) that comes with some

training materials4 so9tware and data

<8tain this !) 8y contacting 3S*I at yo"r local

o99ice.





To !oncl"de This was a 8rie9 introd"ction to the 5ydrologic

Tools aaila8le within ArcView

*ealm o9 &ossi8ilities was the intent o9 this

wor$sho#

M"ch more can 8e done with this st"994 all it ta$es

is some imagination and ideas on how to a##ly this

in9ormation.

Documents

Hydro Modeling Workshop