HAMMAMET CASE STUDY PROGRESS Realization of an Hydrogeologic

HAMMAMET CASE STUDY PROGRESS Realization of an Hydrogeologic Information System of Nabeul-Hammamet region September 2004

CONTENTS • OBJECTIVES • PRODUCTS / REALIZATION • HYDROGEOLOGIC INFORMATION SYSTEM • CONCLUSION

OBJECTIVES Realization of a geographic database : ü 33 vector layers ü 3 raster data Realization of an hydrogeologic, hydrologic and hydrodynamic database in order to determine the: § Hydrological characteristics § Hydrogeological characteristics § Hydrodynamic characteristics Input of Water. Ware Input of Telemac Realization of an environmental database Realization of a socio-economic database in order to understand the social behaviour (SUMER)

METHODOLOGY Primary data Collection Bibliography Satellite map Hydrogeologic data Map (topo, soil…) Socio-economic data Meteorological data Analysis and data Processing Geographic Information Conception Telemac Water. Ware Despite the availability of many data, their integration is lacking via the WEB

PRODUCTS / REALIZATION

GEOGRAPHIC DATABASE Raster DATA: • Aerial photos 2000 • Spot image 1988 Corine land cover • Soil map THEMATIC MAP: • Marine map • Topographic map • Geologic map BIBLIOGRAPHY Landuse map • Soil Type • Bathymetry • Contour line, road network • Railway, bench mark… • Lithology, tectonic Analysis and synthesis Technical report FIELD WORK Data collection and validation

Catchment areas : ü 12 catchment areas ü Dense Drainage network ü Lithology: mudstone Demography: ü Population: 68740 inhabitants ü Density: 208 inhabitants/km² Nodes: ü 8 mountain dams ü 6 mountain lakes ü 1544 wells Aquifer: ü Area = 133 Km² ü Lithology = plio-quaternary ü State = overexploitated ü Groundwater storage = 25 MCM / year ü Exploitation = 18 MCM / year ü Number of assessed wells = 1544 wells Water use: ØAgriculture ØDomestic ØTouristic I n crease HYDROGEOLOGIC DATABASE

Hydrologic study of the catchment areas Catchment geometry Legend 400 -450 m Catchment relief 350 -400 300 -350 Drainage network 250 -300 m 200 -250 m Water debit in the catchments 150 -200 m 100 -150 m 50 -100 m 0 -50 m Limite du BV Drainage Digital Elevation Model of the drainage basin of Sidi Khlas

Water nodes §Collection of 1544 wells built in the Hammamet region: complete information is available concerning: wells depth, diameter, usage, exploitation, equipment, standing water level, dry residue… §Dams: name, coordinates , sector, year of construction, storage capacity, irrigated area, inflow water, name of catchment… §Collection of historic data related to observation wells in the phreatic water table §Mountains Lakes: name, coordinates, realization year, name of catchment, area of the catchment, storage capacity, delegation… §Observation well: name, coordinates, year, dry residue , standing water level… Hydrogeologic database ØStorage of the data ØEasy access to the data ØOutput and input data in Real-Time

LAND USE CHANGE

THE METHODOLOGY OF THE CARTOGRAPHIC EDITION LAND USE MAP Aerial photo Spot XS Photo-interprtation & textural treatment Corine land cover classification Agricultural environment Arable land Permanent crops Heterogeneous agricultural Artificial environment Urban area Industrial and commercial area Dump and mine Artificial and non agriculture area Inland waters LAND USE MAP Natural environment Forest Beach Sebkha Reservoir Pastural

Land use map (1988) Land use map (2000)

STATISTICAL LAND USE CHANGE 9544683, 47 2, 31 3, 42 12 Industrial, commercial and transport units 3272792, 53 8812707, 91 1, 15 3, 16 13 Mine, dump and constrution sites 264909, 22 215684, 12 0, 09 0, 08 Agricultural environmental 21 Arable land 58796877, 57 67885626, 68 20, 70 24, 35 22 crops Permanent 123473281, 75 99135230, 26 43, 46 35, 55 24 Heterogeneous agricultural areas 8865746, 20 4209495, 87 3, 12 1, 51 Natural environmental 31 Forest 61807266, 69 58975858, 91 21, 76 21, 15 32 Shrubs and/or herbacus vegetation associations 14526685, 59 21876145, 28 5, 11 7, 85 33 Open spaces with little or no vegetation 1661072, 45 2438902, 35 0, 58 0, 87 51 Inland waters 717958, 04 3782161, 66 0, 25 1, 36 52 Marine waters 4136225, 04 1966931, 05 1, 46 0, 71 100, 00 Total 284076891, 35 278843427, 56 60, 2 6554076, 25 78, 92 Urban fabric Etat 2000 14, 16 11 Etat 88 66, 6 % area 2000 17, 1 % area 88 64, 72 Area 2000 (m²) 82, 76 Area 88 (m²) 55, 3 Level Artificial environment Code

Water. Ware nodes chart legend well touristic area locality study area dam gettar area lackes irrigated area

MAIN IDEA OF THE HYDROGEOLOGIC INFORMATION SYSTEM Hydrogeologic Information System Hydrologic data ØCharacteristics of the catchments area ØManagement of the regions ØDetermination of the hydrologic characteristics ØCalculate the inflow Water in each Catchment Hydrogeologic data Environmental data Meteorological data ØCharacteristics of 1544 ØTreatment station plant Ø Climat data: Well Generality of STEP Temperature Affluents STEP Rainfall Effluents STEP Wind ØHydrogeologic Evaporation characteristics of the water table ØDam and lacke characteristics ØOceanographic data: Swell ØHazardous substances Tidal Wave

SOCIO-ECONOMIC DATABASE Nom de l’indicateur Unité Valeur Population Growth Rate %o /year 2, 3 Migratory Rate %o/year 3, 1 Population Density Number of People / km 2 208 Crude Death Rate %o/year 5, 5 Crude Birth Date %o/year 16, 9 Life Expectancy at Birth years 72, 9 Growth of G. D. P. % 1, 3 Activity Rate % 48, 2 Agri. Income Distr. by the Main Types of Produc. MILLION EURO 2086 Inds. Income Distr. by the Main Types of Produc. MILLION EURO 4826 Percentage of Tertiary Employment % 39 Tourism Income Contribution to the Reg. Product MILLION EURO 1100 Water Price for the Domestic Use EURO/M 3 0, 273 Water Price for the Agriculture Use EURO/M 3 0, 041 Water Price for the Industry EURO/M 3 0, 506 Water Price for the Tourism Units EURO 0, 506 Water Treatment Investments MILLION EURO 9 Reservoir Storage Investments MILLION EURO 8 Water Distribution and Use Systems Investments MILLION EURO 230 Water Consumption per capita liters/day 110 Domestic Water Consumption per capita liters/day 100 Commercial Water Consumption per capita liters/day 80 Agricultural Water Consumption per capita liters/day 820 Industrial Water Consumption per capita liters/day 417

Extension of the Hydrogeologic Information System ØUse of a powerful Data Base System Management (Access is limited about storage capacity and data security) ØIntegration of a statistic module for designing graphs using some of the data base’s stored Decision Support System (DSS)

INTEREST OF THE HYDROGEOLOGIC INFORMATION SYSTEM q A Data Bank with a maximum of data about region’s feature (hydrological, hydrogeological, environmental, socioeconomic, meteorological, soil, GIS data…) q. Regroup and organize data in the same frame. The scatting of the hydrogeological data about the catchment area will be a hurdle behind researches q. We can manage a SHP files without using Arc. View q. Simulation of water inflow in the catchment q. Conception allowing making additions of new frames and modules q. Update will be very easy since data will be centralized q. Possibility of generalization of this system to the whole Tunisia

SUMMARY Realized works: §Geographic database: § 33 layers SHP and 3 raster data Ø Land use map Ø Iso-salinity, iso-piezometric and iso-depth map §Hydrogeological database: § Information about 1544 wells (depht, standing water level, salinity, …) § Information about the water table (phreatic and profond) § Information about nodes: ØLake, dam… ØObservation well, bore hole… §Socio-economic database: socio-economic dynamic (population, migration, demography increases…) §Vectors layers and raster data technical report §Hydrological technical report §Determination of the inputs user in Water. Ware

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