Turkey Earthquake and Flood Recovery Project (TEFER), Turkey
| Period: | 1999-2000 |
|---|---|
| Location: | Turkey |
| Client: | Directorate of State Hydraulic, Ministry of Energy and Natural Resources, Turkey |
assignment/short description
Massive flooding in the West Black Sea Region of Turkey followed heavy rainfall in the Anatolian highlands in May 1998. The effects of floods, which resulted in erosion of river channels, landslides and blocking of channels by deposition of sediments, caused causalities, suffering and extensive damage to both public and private property and costly social and economic disruption. In response to the floods, the Government of Turkey, with assistance of the World Bank, executed a programme of investigations and rehabilitation works. The purpose of the investigations was to develop a flood management programme to reduce or eliminate long-term risk and damage to people and their property. In the West Black Sea Flood Region the priority is laid on engineered flood defence works, mainly in the form of channel improvements. Flood defence works have already been in place in the region, but many were damaged or destroyed in the 1998 flood event. The design works include the repair, rehabilitation and improvement of existing flood defences as well as the development of new works.
In the project, Deltares carried out a special task “Sediment Transport Investigation in West Black Sea Flood Region” to provide the following information:
- Final design and recovery of flood control infrastructure
- Final design and construction studies for channel plan improvements in the region
- Comprehensive and integrated water and flood management basin planning studies including feasibility studies for new high priority infrastructure projects adopted as part of these plans.
Project: Turkey Earthquake and Flood Recovery Project (TEFER): Sediment transport component (1999 – 2000)
In the TEFER project, a quantitative and qualitative evaluation of erosion processes in the river catchments affected by the floods and earthquakes of 1998/99 and the movements of sediments in the rivers was made and resulted in a set-up of general guidelines regarding the erosion processes in the respective basins as well as the sediment transport in the rivers. A provision was made of the required data regarding erosion and sediment transport for the flood damage repair component of the TEFER project. Main components of the project were:
- Data collection of erosion and sediment transports in the various basins/project locations;
- Analysis of erosion and sediment transport mechanisms and amounts for both regular erosion, landslides, and flood or earthquake related events;
- Frequency analysis of floods in the various basins, both regular and extreme floods;
- Analysis and prediction of sediment transport capacity as related to sediment loads for the various rivers and project locations in the area;
- Modelling studies in order to assess the impact of erosion and sediment transport on the flood carrying capacity of the rivers and at the various project locations;
- Conceptual design of river engineering measures to improve flood and sediment transport conveyance.
