HECRAS
Other Features (2)
HECRAS
sxva maxasiaTeblebi (2)
by G. Parodi
WRS – ITC – The Netherlands
g. parodi
WRS-ITC- niderlandebi
Other Features of HEC-RAS- part 2
HEC-RAS-is sxva maxasiaTeblebi - meore nawili
 Cross Section Interpolation
 ganivi kveTis interpolacia
 Multiple Plans
 ramodenime gegma
 Supporting Pictures
 suraTebis mxardaWera
Cross Section Interpolation
ganivi kveTis interpolacia
Cross Section Interpolation
ganivi kveTis interpolacia

Sometimes it is necessary to supplement surveyed cross section data by
interpolating new sections between two surveyed sections

xandaxan saWiroa SevavsoT gamokvleuli ganivi kveTebis monacemebi, ori arsebuli ganivi kveTis
interpolaciis saSualebiT.

Typically needed when the change in velocity head is large. HECRAS
detects this by comparing conveyance values between two sections.

rogorc wesi am operaciis Catareba saWiroa maSin, rodesac gvaqvs mniSvnelovani cvlileba
gadazidvis zewolaSi. HECRAS-i gamoavlens amas ori seqciis Soris arsebuli gadazidvis
monacemebis Sedarebis gziT.
Cross Section Interpolation
ganivi kveTis interpolacia
Geometric interpolation is accomplished by linearly
interpolating between elevations and stations along “cords”
geometriuli interpolacia xorcieldeba, horizontebis gaswvriv mdebare sadgurebsa da simaRleebs Soris xazovani
interpolaciis saSualebiT.
2 Options – 2 parametri
Interpolate a reach (more than 2 cross-sections)
gawvdomis interpolacia (2 ze meti ganivi kveTi)
Between 2 cross-sections
2 ganiv kveTs Soris
Cross Section Interpolation
ganivi kveTis interpolacia
Cross Section Interpolation
Master Cords - 5 Defaults
ganivi kveTis interpolacia
ZiriTadi kvanZebi- 5 aucilebeli piroba
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
First coordinate of cross section
ganivi kveTis pirveli koordinati
Left bank (required)
marcxena napiri (savaldebuloa)
Minimum elevation point in main channel
minimaluri simaRlis aRmniSvneli wertili ZiriTad arxSi
Right bank (required)
marjvena sanapiro (savaldebuloa)
Last coordinate of cross section
ganivi kveTis bolo koordinati
Cross Section Interpolation
Master Cords
ganivi kveTis interpolacia
ZiriTadi horizontebi
Be Aware Of What The “Default” Is Doing
viyoT informirebuli, imaze Tu ra keTdeba “winapirobis” mixedviT
 User can establish more Master Chords to prevent misinterpolations

momxmarebels SeuZlia gamosaxos meti ZiriTadi horizonti raTa aaridos Tavi mcdar interpolacias
Adding Master Chords to Interpolation
ZiriTadi horizontebis damateba interpolaciisas
An adequate interpolation adding master chords
adekvaturi interpolaciisas emateba ZiriTadi horizontebi
Cross Section Interpolation: Minor Cords
ganivi kveTebis interpolacia: meoradi horizontebi
zedadinebis seqcia
bolo koordinati
pirveli koordinati
marjvena sanapiro
marcxena sanapiro
gadmobruneba
interpolirebuli
seqcia
qvedadinebis seqcia
Cross Section Interpolation: Minor Cords
ganivi kveTebis interpolacia: meoradi horizonti
 Automatically generated by program

avtomaturad yalibdeba programis mier
 Stations are determined using proportional distances between
master cords

sadgurebi ganisazRvreba ZiriTad horizontebs Soris proporciuli distanciis gamoyenebiT
 Number of minor cords = sum of coordinates in bounding cross
sections minus number of master cords

meoradi horizontebis raodenoba = mosazRvre ganiv kveTebis koordinatebis jams minus ZiriTadi horizontebis
raodenoba
Cross Section Interpolation: Roughness Coefficients
ganivi kveTebis interpolacia: xaxunis koeficienti

4 default master cords (same as geometric minus the minimum channel elevation)

4 winapirobiT miRebuli ZiriTadi horizonti (igivea rac, geometriulad gamovakloT kalapotis minimaluri simaRle)

Minor cords added at other locations if more than 3 ‘n’ values at either cross sect.

meoradi horizonti emateba yvela im adgilas, sadac mniSvneloba metia vidre 3 ‘n’ yovel ganiv kveTze

Otherwise same as geometric interpolation

sxva SemTxvevaSi igivea, rac geometriuli interpolacia
Cross Section Interpolation: Other
ganivi kveTebis interpolacia: sxva

Other features which are interpolated: downstream reach lengths, main channel bank
stations, contraction and expansion coefficients, normal ineffective flow areas, levees, and
normal blocked obstructions

maxasiaTeblebi, romelTa interpolacia xdeba: qveda dinebis gawvdomis sigrZe, ZiriTadi kalapotis napiris sadguri, kumSvis da
gafarToebis koeficientebi, normuli araefeqturi dinebis regionebi, dambebi da normuli gamavlobis dablokva.

Normal ineffective flow areas, levees, and normal blocked obstructions are interpolated only
if both bounding cross sections have them.

normaluri araefeqturi dinebis zona, dambebi da normuli dablokili gamavlobis Semcirebis interpolacia xdeba mxolod im
SemTxvevaSi, Tu orive mosazRvre ganiv kveTas aqvs is.

Can interpolate between 2 cross sections or entire reach

SesaZlebelia interpolacia 2 ganiv kveTi Soris an srul gawvdomaze.
Multiple Plans
HEC-RAS - ramodenime gegma
HEC-RAS - Multiple Plans
HEC-RAS - ramodenime gegma
Suggested Reading:
Chapter 5 of HEC-RAS
User’s Manual
rekomendirebuli literatura:
HEC-RAS-is saxelmZRvanelo
Tavi 5
HEC-RAS - Multiple Plans
HEC-RAS - ramodenime gegma
proeqtis faili: failis saxeli. prj
geometriuli monacemebi
fili saxeli. g01
geometriuli monacemebi
fili saxeli. g02
geometriuli monacemebi
fili saxeli. g03
damyarebuli dinebis monacemebi
failis saxeli. g01
Suggested Reading:
gegma 1
fili saxeli. p01
gegma 2
fili saxeli. p02
gegma 3
fili saxeli. p013
gauSvi faili 1
fili saxeli. r01
gauSvi faili 2
fili saxeli. r02
gauSvi faili 2
fili saxeli. r03
Chapter 5 of HEC-RAS
User’s Manual
rekomendirebuli literatura:
HEC-RAS-is saxelmZRvanelo
Tavi 5
Sedegi 1
fili saxeli. o01
proeqtis monacemTa failebis sqema
Sedegi 2
fili saxeli. o02
Sedegi 3
fili saxeli. o03
HEC-RAS - Multiple Plans
HEC-RAS - ramodenime gegma
Able to compare
plans in tables:
SesaZlebelia gegmebis
Sedareba cxrilis
saSualebiT
HEC-RAS - Multiple Plans
HEC-RAS - ramodenime gegma
Able to compare plans in tables:
SesaZlebelia SevadaroT gegmebi cxrilebis saSualebiT
HEC-RAS - Multiple Plans
HEC-RAS - ramodenime gegma
Able to
compare plans
in tables:
SesaZlebelia
SevadaroT gegma
cxrilis saSualebiT:
HEC-RAS - Multiple Plans
HEC-RAS - ramodenime gegma
As well as in
profiles, crosssections, etc.:
iseve rogorc profilebi,
ganiv kveTebi da
sxva..:
Supporting Pictures
suraTebis mxardaWera
Supporting Pictures
suraTebis mxardaWera
 A picture can be “attached” to a cross section to help in
documentation of the data.
 SesaZlebelia suraTebis mimagreba ganiv kveTebTan, rac daxmarebas gagviwevs
monacemTa bazebis dokumentaciaSi.
 A picture can also be “attached” to the river schematic to assist
in documentation.
 SesaZlebelia aseve suraTebis mimagreba sqematur gamosaxulebasTan, rac gamosadegia
monacemTa bazebis dokumentirebisas..
Example - Cross-Section
magaliTi – ganivi kveTi
Example - River Schematic
magaliTi - mdinaris sqematizacia
Example - River Schematic
magaliTi - mdinaris sqematizacia
Example - River Schematic
magaliTi - mdinaris sqematizacia
Log Files
registrirebis failebi

Program will write notes to a file as it performs the computations.

programa Tanmimdevrulad Caiwers gaangariSebebis da operaciis msvlelobis yvela moqmedebas
Sesabamis failSi.

10 different levels of output.

Sedegebis 10 gansxvavebuli done.

Files can get extremely large if higher levels are selected.

SeiZleba miviRoT eqstremalurad didi zomis failebi, Tu SevarCieT gamoangariSebis maqsimaluri done.

Generally not necessary unless unusual answers are given by the program.

rogorc wesi araa savaldebulo, Tu programam ar mogvawoda uCveulo, mcdari Sedegi.
Other Options
sxva parametrebi
There are other options not discussed in this presentation:
arseboben sxva parametrebic, romelTa ganxilvac ar moxda am moxsenebaSi:

Scour at bridges

gamorecxva, erozia xidebTan

Lateral weirs

lateraluri jebirebi

Ice-covered rivers

yinuliT dafaruli mdinareebi

Cross-Section points filter

ganivi kveTebis wertilebis filtri

Fixed sediment elevations

naleqebis fiqsirebuli simaRle

Pilot channels

piloturi nakadebi

Setting ineffective flow areas to permanent

araefeqturi dinebis monakveTis ganxilva, rogorc permanentuli dinebis mqone monakveTis.
Any
Questions?
kiTxvebi gaqvT?