A. Ceppi, G. Ravazzani , M. Mancini - Arpae · Il modello idrologico distribuito FEST-WB A. Ceppi,...

Il modello idrologico distribuito FEST-WB

A. Ceppi, G. Ravazzani, M. Mancini

Bologna, 30 maggio 2011Politecnico di Milano – D.I.I.A.R. (Department of Hydraulic, Environmental, Roads and Surveying Engineering), Milano, Italy

Il modello idrologico distribuito FEST-WB 2

Ravazzani, G., Rametta, D., Mancini, M. (2011), Macroscopic Cellular Automata for groundwater modelling: a first approach, Environ. Modell. Softw., 26(5), 634-643. doi:10.1016/j.envsoft.2010.11.011

Corbari, C., Ravazzani, G., Mancini, M. (2011), A distributed thermodynamic model for energy and mass balance computation: FEST-EWB. Hydrol. Processes, 25(9), 1443–1452.

Corbari C., Sobrino J.A., Mancini M., Hidalgo V., (2010), Land surface temperature representativeness in a heterogeneous area through a distributed energy-water balance model and remote sensing data, Hydrol. Earth Syst. Sc., 14, 2141–2151.

Pianosi, F., Ravazzani, G. (2010), Assessing rainfall-runoff models for the management of Lake Verbano. Hydrol. Processes, 24(22), 3195-3205. doi:10.1002/hyp.7745

Ceppi, A., Ravazzani, G., Rabuffetti, D., Mancini, M. (2010), Evaluating the uncertainty of hydrological model simulations coupled with metorological forecasts at different spatial scales. Procedia - Social and Behavioral Sciences, Volume 2, Issue 6, 2010, Pages 7631-7632.

Ranzi, R., Bacchi, B., Ceppi, A., Cislaghi, M., Ehret, U., Jaun, S., Marx, A., Hegg, C., Zappa, M. 2009. Real-time demonstration of hydrological ensemble forecasts in MAP D-PHASE. La-Houille-Blanche. 5. 95-103. doi:10.1051/lhb/2009061

C. Corbari, G. Ravazzani, J. Martinelli, and M. Mancini. (2009), Elevation based correction of snow coverage retrieved from satellite images to improve model calibration. Hydrol. Earth Syst. Sc., 13(5), 639-649.

Il modello FEST-WBUn po’ di storia

M. Mancini. La modellazione distribuita della risposta idrologica: effetti della variabilitàspaziale e della scala di rappresentazione del fenomeno dell'assorbimento. PhD thesis, Politecnico di Milano, 1990

FEST-WB: Flash – flood Event – based Spatially –distributed rainfall – runoff Transformation – including

Water Balance


Il modello FEST-WBSchema completo di calcolo

DEM

Parametridel suolo

Parametridella vegetazione

Forzantiatmosferiche

Dinamicaneve

Interpolazione spaziale:Thiesse, Dist. Inversa, ecc.

Definizione delreticolo idrografico

Bilancioidrologico

Propagazione: invaso lineare

Propagazione: Muskingum-Cunge

Idrogramma

PercolazioneDeflusso

superficiale

Ingresso

Uscita

LEGENDA

Processo

VariabileInterna

FEST-WB: Flash – flood Event – based Spatially –distributed rainfall – runoff Transformation – including

Water Balance


Reference level

DigitalElevation

Model

Costant verticalthermal gradiant:

0.65°C/100 m

TemperatureTemperature

Il modello FEST-WBInterpolazione della misura di temperatura


Il modello FEST-WBDinamica della neve

>⇔=

<<⇔−−=

≤⇔=

sup

supinf

infsup

inf

inf

1

)(0

TT

TTTTT

TtTTT

a

a

air

a

α

α

α

( )bam

TTCSnowMelt −=Ta = air temperature Tb = threshold temperatureCm = melt coefficient [m/(s °C)]

snowsnowrainrain

accumulationaccumulation

meltmelt

°CTinf Tsup

1

precipitationprecipitation, , PP

PPl α= PPs )1( α−=

ACCUMULATION

MELTING

Rainfallfraction


°CTinf Tsup

1

-3°C 0°C

Corbari et al (2007) HESSD

Il modello FEST-WBDinamica della neve


bare soil - Ta=13.4 °C - RH=0.47

-1000

-500

0

500

1000

1500

2000

-30 -20 -10 0 10 20 30 40 50

LST (°C)

ba

lan

ce e

qu

atio

n0)()()()()( =−−−= RETGRETETRETHRETRRETf nt λ

0)( =RETf )(RETmoistureSoil

( )aspa

sas

v

ca

v eTec

rr

f

rr

fELEsLEv −

+−+

+==+ ∗ )(

)(

)1(

)( γρ

λ

∫=V

soilcanopy dxdydzTTTRET ),(

Finding an integral temperature which isrepresentative of the heterogeneity of the termodynamic exchanges

Representative Volume

Corbari et al (2011) HP

Ptot=R+ETeff+D+(θt+1-θt)*Z

dt

dSLEHGRn =−−− Cp

LEETeff

ρ=

R

P

I

D

Sub-flow

Zθθθθ

R

P

I

D

Sub-flow

Zθθθθ

Soil water balance

Energy balance

Il modello distribuito FEST-EWBBilancio Energetico


29 january 03 - 11 am

0.00E+00

1.00E+04

2.00E+04

3.00E+04

4.00E+04

modis fest

N° p

ixel

s

40-45

35-40

30-35

25-30

20-25

15-20

10 - 15

5-10

0 -5

-5 - 0

-10- -5

-15 - -10

29 january 03- 11am

FEST-EWB MODIS

29 july 03- 01 pm

0.00E+00

1.00E+04

2.00E+04

3.00E+04

4.00E+04

modis fest

N° p

ixel

s

40-45

35-40

30-35

25-30

20-25

15-20

10 - 15

5-10

0 -5

-5 - 0

-10- -5

-15 - -10

29 july 03 - 1pm paddies

Ts°

Comparison between RET fromFEST-EWB and LST from MODIS

Is it reasonable to use evaporation flux measures s imilarly to discharge measurements?

Il modello distribuito FEST-EWBBilancio Energetico


( )tC

tS

CS

CSSC hh

TT

TTQ −

+= 2

( )tC

tE

CE

CEEC hh

TT

TTQ −

+= 2

CWCSCECNCC WQQQQQ ++++=

C

N

S

EW C

N

S

EW

Von Neumann neighbourhood definition

( )tC

tN

CN

CNNC hh

TT

TTQ −

+= 2

( )tC

tW

CW

CWWC hh

TT

TTQ −

+= 2

Local flux calculation

QNC

QEC

QSC

QWC

WC

QNC

QEC

QSC

QWC

WC

Scheme for the calculation of water fluxes

Hydraulic head updatingt

s

Q

Shh Ct

CtC ∆

∆+=+

21 1

h = hydraulic headT = transmissivity [L2/T]

S = storativity [-]WC = sources (+) or sinks (-)

Modellazione degli acquiferiIl modello distribuito FEST-EWB

Ravazzani et al (2011) Env. Mod. Softw.


A

A’

B

B’

C’C

A A’

B B’

C C’

( )fiumefaldaT

T hhB

wLkQ −⋅⋅=

Interazione acquiferi-acque auperficialiIl modello distribuito FEST-EWB


Library to read NetCDF maps (Fortran 90)

GridLib (6’600 lines)

Built on top of netcdf library

GridLib exposes higher levelroutines to read and writeraster georeferenced data in netcdf format

GeoLib (3’200 lines)

Library to convert maps todifferent coordinate referencesystems (includes CH1903).

Geodetic Coordinate UTM zone 32 North

Example: load and conversion of temperature fromtas_dm_6170_ERA40.nc


Pre.G.I. – Previsione meteo idrologica per la gestione irrigua

giorni301

pioggia

θ


ACQWA http://www.acqwa.ch

Assessing Climate Impacts on the Quantity and quality of WAter


DRAGON2 http://dragon2.esa.int

Dragon 2 focuses on exploitation of ESA, TPM and Chinese EO data for science and applications

development in land, ocean and atmospheric applications.


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A. Ceppi, G. Ravazzani , M. Mancini - Arpae · Il modello idrologico distribuito FEST-WB A. Ceppi,...

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