3 November 2014

Introduction to PC-Lake within

DELWAQ for Case Study Lake Tai-Hu,

China Annette Janssen (NIOO-KNAW) &

Michel Jeuken (Deltares)

What is PCLake?

• Started as a model for

Phosphorus and Carbon

in the foodweb of Lake

Loosdrecht (an eutrophic

shallow lake) by

Jan Janse et al. (RIVM)

in the 80’s

• Generalised to PCLake

in the 90’s

• Was programmed in ACSL

• N.B.: It does contain

nitrogen, too..

How did PCLake and up in DELWAQ?

1990’s: Two dutch 1D (water quality) models:

STOWA – DUFLOW Delft Hydraulics - SOBEK

DELWAQ = WQ core of SOBEK

Water quality DUPROL language Proces Library (PLCT)

processes Standard processes OpenPLCT

PCLake

In ACSL

2010’s: Merge between DUFLOW and SOBEK

Standard processes made available in SOBEK and DELWAQ

Translator

Parser

DUPROL

DUPROL Parser

PARSER:

• Sub-file

• Proc_def

• FORTRAN code

All you need for an OpenPLCT!

OpenPLCT manual

Parser code in open source:

svn.oss.deltares.nl/repos/delft3d/trunk

Look in: src/tools_gpl/duprol2delwaq

/* MODEL WATERTEMPERATUUR STROMENDE EN STAGNANTE WATERSYSTEMEN */

/* TEMP1 (VOLLEDIGE WARTMTEBALANS) */

/* STOWA project uitbreiding procesbeschrijvingen DUFLOW */

/* */

/* Landbouwuniversiteit Wageningen */

/* Vakgroep Waterkwaliteitsbeheer en Aquatische Oecologie */

/* Postbus 8080 */

/* 6700 DD Wageningen */

WATER TW [20.0] oC ;Watertemperatuur

PARM RFS [0.10] - ;Reflexie korte golf straling

PARM RFA [0.03] - ;Reflexie lange golfstraling

XT FS [ 0.0] W/m2 ;Korte golf straling

XT TA [20.0] oC ;Luchttemperatuur

XT RV [ 8.0] % ;Relatieve vochtigheid

XT Zon [100.] % ;Percentage zonneschijnduur

XT W [ 2.0] m/s ;Windsnelheid

XT P [1020] mbar ;Luchtdruk

FLOW Z [1.0] m ;Waterdiepte

{

ES=1.33*0.75*exp(54.721-(6788.6/(TA+273.15))-5.0016*ln(TA+273.15));

EA=RV*ES*0.01;

bw=(100-Zon)/100;

EPSA=(0.53+0.067*EA^0.5)*(1+0.17*bw*bw);

SIGMA=0.0000000567;

RHO=1000;

Cp=4200;

FSnet=(1-RFS)*FS;

FA=epsa*sigma*(TA+273.15)^4;

FAnet=(1-RFA)*FA;

FW=0.97*SIGMA*(TW+273.15)^4;

K=4.4+1.82*W;

FL=K*(ES-EA);

FC=0.000619*P*(TW-TA)*FL/(ES-EA);

FSOM=FSnet+FAnet-FW-FL-FC;

k0(TW)=86400*FSOM/(rho*Cp*Z);

}

Model translation taken one step further

Water quality DUPROL language Proces Library (PLCT)

processes Standard processes OpenPLCT

PCLake

In ACSL

DOI: 10.1016/j.envsoft.2014.04.004

Translator

Parser

DUPROL

Osiris

Other environments

Database Approach

To Modelling

And now…

… Annette Janssen on PCLake within DELWAQ in Delft3D 4

A case study of Lake Tai-Hu, China