European Commission - DG Environment Walloon Regional Government Province of Limburg - The Netherlands Province of Limburg - Belgium Waterboard Roer & Overmaas 3LORWSURMHFW IRUWKHGHILQLWLRQRIHQYLURQPHQWIULHQGO\PHDVXUHV WRUHGXFHWKHULVNIRUIODVKIORRGV LQWKH*HXO5LYHUFDWFKPHQW %HOJLXPDQGWKH1HWKHUODQGV B4-3040/97/730/JNB/C4 by S. Dautrebande, J.G.B. Leenaars, J.S. Smitz & E. Vanthournout (eds.) May 2000 European Commission - DG Environment Walloon Regional Government Province of Limburg - The Netherlands Province of Limburg - Belgium Waterboard Roer & Overmaas 7$%/(2)&217(176 5SCENARIO DEVELOPMENT .......................................................................................................... 59 5.1 INTRODUCTION........................................................................................................................... 59 5.2 APPROACH ................................................................................................................................. 59 5.3 IDENTIFICATION OF ALL POTENTIAL MEASURES ......................................................................... 60 5.4 GROUPING OF MEASURES ........................................................................................................... 60 5.5 RANKING OF MEASURES PER ‘MODEL-BASED’ GROUP ................................................................ 61 5.6 SELECTION OF SCENARIOS TO BE USED IN THE STUDY ................................................................ 62 +<'52/2*,&$/678'< 6.1 INTRODUCTION........................................................................................................................... 65 6.2 OBJECTIVES................................................................................................................................65 6.3 METHODOLOGY AND APPROACH ................................................................................................ 65 6.4 INPUT DATA FOR THE HYDROLOGICAL STUDY ............................................................................ 66 /LPQLPHWULFGDWD &OLPDWLFGDWD *HRJUDSKLFGDWD 6.5 HYDROLOGICAL CHARACTERISATION OF THE GEUL RIVER CATCHMENT AREA.......................... 69 )ORRGIUHTXHQF\DQDO\VLV &KDUDFWHULVWLFHYHQWV :DWHUEDODQFHRIWKHFDWFKPHQWDUHD 6.6 MODEL DEVELOPMENT............................................................................................................... 72 'HVFULSWLRQRIWKHPRGHO 6.6.1.1 Soil sub-model EPIC-GRID.............................................................................................................73 6.6.1.2 The groundwater sub-model ............................................................................................................73 6.6.1.3 The master code ...............................................................................................................................73 6FKHPDWLVDWLRQRIWKHFDWFKPHQW 6.6.2.1 Preparation of the spatial data..........................................................................................................74 6.6.2.2 Determination of initial parameters..................................................................................................76 6.7 MODEL VALIDATION .................................................................................................................. 76 6HOHFWLRQRIWKHVLPXODWLRQSHULRG 5HVXOWVRIWKHYDOLGDWLRQ &RQFOXVLRQVRIWKHYDOLGDWLRQ 6.8 MODEL APPLICATION AND SCENARIO SIMULATION .................................................................... 80 6FHQDULRV Table of contents I European Commission - DG Environment Walloon Regional Government Province of Limburg - The Netherlands Province of Limburg - Belgium Waterboard Roer & Overmaas 5HVXOWV 6.9 CONCLUSIONS ............................................................................................................................ 85 6.10 RECOMMENDATIONS .................................................................................................................. 86 6.11 ACKNOWLEDGEMENT................................................................................................................. 86 +<'52'<1$0,&678'< 7.1 INTRODUCTION........................................................................................................................... 87 7.2 OBJECTIVES................................................................................................................................88 7.3 APPROACH ................................................................................................................................. 88 7.4 MODELLING OF THE GEUL AND ITS TRIBUTARIES ....................................................................... 89 7KH,6,6PRGHOOLQJSDFNDJH 0RGHOVHWXS 7.4.2.1 Topological discretisation................................................................................................................90 7.4.2.2 Hydraulic structures.........................................................................................................................90 7.4.2.3 External boundary conditions ..........................................................................................................93 &DOLEUDWLRQDQGYHULILFDWLRQRIWKHPRGHO 7.5 SIMULATIONS ............................................................................................................................. 94 'HVFULSWLRQ 5HVXOWV 7.6 CONCLUSIONS AND RECOMMENDATIONS ................................................................................. 101 /(*$/)5$0(:25. 8.1 INTRODUCTION......................................................................................................................... 105 8.2 THE NETHERLANDS.................................................................................................................. 106 $FWRUVLQWKH'XWFKLQVWLWXWLRQDOOHJDOIUDPHZRUN ,QVWUXPHQWV 7KHDSSOLFDELOLW\PDWUL[ 8.2.3.1 National level.................................................................................................................................109 8.2.3.2 Provincial level ..............................................................................................................................110 8.2.3.3 Local level......................................................................................................................................111 &RQFOXVLRQVRQWKH'XWFKOHJDOIUDPHZRUN 5HFRPPHQGDWLRQV 8.3 BELGIUM .................................................................................................................................. 113 8.4 THE FLEMISH REGION .............................................................................................................. 114 $FWRUVLQWKH)OHPLVKLQVWLWXWLRQDOOHJDOIUDPHZRUN 8.4.1.1 Regional level ................................................................................................................................114 8.4.1.2 Provincial level ..............................................................................................................................115 Table of contents II European Commission - DG Environment Walloon Regional Government Province of Limburg - The Netherlands Province of Limburg - Belgium Waterboard Roer & Overmaas 8.4.1.3 Local level......................................................................................................................................115 ,QVWUXPHQWV 8.4.2.1 Water-resources management ........................................................................................................116 8.4.2.2 Land use planning..........................................................................................................................119 8.4.2.3 Land use and agricultural policy....................................................................................................121 8.4.2.4 Environmental policy.....................................................................................................................122 7KHDSSOLFDELOLW\PDWUL[ &RQFOXVLRQVRQWKH)OHPLVKOHJDOIUDPHZRUN 5HFRPPHQGDWLRQV±)OHPLVK5HJLRQ 8.5 THE WALLOON REGION............................................................................................................ 132 $FWRUVLQWKH:DOORRQLQVWLWXWLRQDOOHJDOIUDPHZRUN 8.5.1.1 Regional level ................................................................................................................................132 8.5.1.2 Provincial level ..............................................................................................................................132 8.5.1.3 Local level......................................................................................................................................133 ,QVWUXPHQWV 8.5.2.1 Water-resources management ........................................................................................................134 8.5.2.2 Land use planning..........................................................................................................................137 8.5.2.3 Agricultural policy.........................................................................................................................139 8.5.2.4 Environmental Policy.....................................................................................................................140 7KHDSSOLFDELOLW\PDWUL[ &RQFOXVLRQVRQWKH:DOORRQOHJDOIUDPHZRUN 5HFRPPHQGDWLRQVIRUWKH:DOORRQUHJLRQ 8.6 CONCLUSIONS AND RECOMMENDATIONS ................................................................................