Integrated Water Resource Management Programme in the framework of Rural Regional Development: Feasibility study for water transfer from the north to the centre of Tunisia

Detailed description of project:

The variability of the Tunisian climate, the heterogeneity of its geology and contrasts in settlement patterns require the transfer of water from surplus areas to deficit areas and an interconnection between existing hydraulic structures. Regional transfer networks extend over the entire Tunisian territory and contribute to social and economic equity between the regions.

The new North-Centre interconnection has a high priority within the main axes of intervention of the "Integrated Water Resource Management Programme in the framework of Regional Rural Development”. It aims at connecting the hydraulic systems of the north to those of the center of Tunisia, to transfer conventional water resources from surplus areas to deficit areas, thus meeting the water needs of the population and promoting social-economic development in disadvantaged rural areas. The measure is a "no regret" measure for adaptation to Climate Change: Its implementation will reduce vulnerability to water shortages and floods in the beneficiary regions. This study aims ultimately at evaluating the technical, economic, social and environmental feasibility of an inter-basin water transfer between the north and the centre of Tunisia.

The consulting services for the implementation of the measures are divided in two phases:

  • Phase 1: Pre-feasibility study
  • Phase 2: Study of transfer scenarios and engineering design of the scenario selected.
 

Type of services provided:

Phase 1: Pre-feasibility study:

  • Collection and analysis of baseline data (hydrological and piezometric data, network infrastructures, etc.);
  • Hydrological and hydrogeological modelling to establish a water resources assessment for each basin and sub-basin of the North and Centre regions in order to identify surplus and deficit areas including Climate Change scenarios;
  • Simulation and comparison of different scenarios for the allocation and transfer of water resources including Climate Change resilience;
  • Presentation and discussion of the results during consultation and stakeholder workshops.

Phase 2: Study of transfer scenarios and detailed study of the selected scenario:

  • Phase 2a: Realization of further studies to refine the analysis from Phase 1 (preliminary economic, socio-demographic, agro-ecologic and environmental assessments);
  • Phase 2b: Preliminary design study;
  • Phase 2c: Advanced preliminary design study.

Infrastructure components designed:

Pipelines: 464 km additional concrete pipeline;

  • 206 km of 1,800 mm ID;
  • 146 km of 1,600 mm ID;
  • 60 km of 1,250 mm ID;
  • 41 km of 1,000 mm ID;
  • 11 km of 800 mm ID;
  • Pumping stations: 9 additional pumping stations with capacities from 1 to 12 m3/s and total head from 25 to 130 m;
  • Reservoirs: 8 additional reservoirs with effective storage ranging from 30 to 200 Mm3 (combined additional capacity 450 Mm3).
 
Direction Générale des Barrages et des Grands Travaux Hydrauliques ; Ministère de l’Agriculture, des Ressources Hydrauliques et de la Pêche
BMZ through KfW
11/2015 - 10/2017
Contract value: 2,085,949 €