• Medjerda is a Tran boundary river. About the third of its watershed is located in Algeria. • Nearly 22 000 km² . 13% of population live there . Water tower of Tunisia . Importance of the basin for drinking water and Agriculture sector Dams in Medjerda basin
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. . . as well as in recent years (2000, 2003, 2004, 2005, 2009, et 2012), . Multi objectives dams and conflict objectives : flood protection, drinking water furniture, irrigation with all maxima in summer season 。 Downstream Sidi Salem dam (750 Mm³) is a flood plain (nearly 2 millions of people)  with urbanization, agricultural and  industrial activities . Upstream dams are inter connected (5 great dams) . Upstream dams in Algeria are also in operation Several generalized floods  occurred in the past (1969 et 1973)
•   Availability of observation networks •   Availability of databases ● Availability of information systems GIS • No basin authority (6 regional authorities (CRDA) under national authority Ministry of Agriculture) Important Studies with DGRE as coordinator – Piseau I : 2001-2007; 328 MDT (BIRD, AFD, AfDB) – Irrigation- Drinking water- Ground Water /SINEAU (information system) – Piseau II : 2009-2014; 216 MDT (BIRD, AFD, AfDB) – Irrigation- Drinking water - WRM
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in:Bargaoui Z, Tramblay Y., Lawin E., Servat E. (2013) Seasonal precipitation variability in regfonal climate simulations over Northern basins of Tunisia. Int. J. Climatol., in press
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Inundations took place along the Medjerda bed in February 2012
● ● To enhance the Medjerda flood warning system SYCOHTRAC of the hydrological division (DGRE) by providing numerical tools for flood forecasting. At the moment, it is based on a network of telemeter raingauge stations together with a network of telemeter limnimetric stations. ● Warnings are operated with respect to some rainfall intensity and water levels thresholds ● A previous work was performed by JICA (2009) in order to find out some regulation rules to mitigate flood impacts in BouSalem City.
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•  To improve the Medjerda river flood monitoring system, •  To develop the use of rainfall satellite information •  To implement a rainfall-runoff and flood routing models for runoff prediction and forecasting. •  To develop data, experiences and rules exchanges between Algeria and Tunisia water managers.
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•  Extension of the river runoff monitoring system by installing six new gauging stations. •  Development of a daily and hourly rainfall database which will serve as reference to evaluate the performances of satellite data •  Integration of the geographical information systems available at the regional level into a unique system for the Medjerda watershed •  Development of exchanging protocols with Algeria
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•  capacity building program
– a) flood routing model such as HEC-RAS, – b) distributed rainfall runoff models; – c) SIG elaboration and flood inundation mapping , – d) model adequacy measures, – e) water survey monitoring. •  Development of the computer capacity of DGRE.
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Relevance: with respect to the flood risk issues. Effectiveness : The project will be used by several water services DGRE, which operates at national level. Regional services (CRDA) Equipment services (DHU) Emergency services (Civil protection) PhD students may be involved in the project Efficiency: the success of the project is guarantied by the state of development of DGRE which honorably maintain a very interesting and unique data base of rainfall and runoff observed in Tunisia for more than a century. Impact : The project will impact the most active region of Tunisia (economically speaking) as well as one of the most populated. Sustainability: With respect to the staff of DGRE which is composed partly of young engineers prompt to adapt to new technologies (satellite information, numerical modeling) as well as to the operational hydrological services at the regional scale (which will maintain the new gauging stations) . . l l l l l . .
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•  Key leaders : DGRE and Université de Tunis El Manar. •  Collaborators : regional services (CRDA), national dam service, Equipment service of DHU, Agriculture representatives (water users), municipalities (population representatives). •  Cooperation at the international level: OSS; AMCOW; JAXA; ESA; NASA; University of Tokyo; JICA, IRD, ITC
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Thank you for your attention a (Char El Melh (Medierda Medierranean outlet)