Page 94 - Water and DSİ

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CHAPTER VI - ENVIRONMENT
Consultancy services have included the development of a flood forecasting model providing
information on the current status of river levels and flows within catchments whilst also providing
predictive estimates of flood flows and levels at given locations, within the accuracy of the data
available. Data integration has become the highest concern of the model. This integration was
achieved by incorporating real time-automatic hydrometric and weather data with real time
quantitative radar data into a rainfall-runoff routing model. This flood forecasting model selected
for DSİ was adapted to local/regional conditions, adjusted by calibrating it, the results of the
model were tested (model verification). Software for the model, staff training and testing the model
in the pilot areas, etc. have all been within the scope of the consultancy services. A flood
forecasting centre has been established and requirements needed to carry out these services more
effectively, together with the staff who will be working in this centre have been determined.
The Project of Capacity Building for Flood Forecasting on the region of Turkey-Bulgaria
Transboundary
Cooperation
: In order to prevent and mitigate, damages resulting from floods
occurring time to time in Edirne in Meritsa Basin The Project of Capacity Building for Flood
Forecasting on the region of Turkey-Bulgaria Transboundary Cooperation has been developed.
The sub component of the project, “Meritsa River Flood Forecasting and Early Warning System
has tendered for a contract Prime Ministry Tendering Department. The contractor of consortium
leading by DHI (Turkey Representation of Denmark Hydrology Institute) started to work on
October 2008 and finished the work on 30/04/2010 in operating condition.
Within the framework of this work, models of precipitation-flow and dam operation have been
established on Bulgarian side. A system demonstrating precipitation-flow together with hydraulic
retarding and flood risk areas has been developed. Flood distribution areas responding various
flood return discharges can be prepared in real time basis. In addition, various scenarios can be
tested without interfering system which ensures flood forecasting regardless possible drawbacks in
real time data flow. The system works smoothly.
6.8. Erosion and Sediment Control Works
Several main causes of the floods are the deterioration of the stability of land in and around the
rivers, destruction of forest areas, and inappropriate agricultural activities. These factors bring
about flood disasters together with erosion and sediment problems.
Erosion is indeed serious problem currently faced in Turkey. Flood-devastated river cause disaster
by caring a great deal of sediment to settlements, arable land, harbor, irrigation channel and dam
reservoirs. According to the inventory studies, 79% of the country has been exposed to water and
wind erosion different level and times.
The measurement and calculation made by Electrical Power Resources General Directorate (EIE)
show that in addition to bed load, nearly 400 Million tons of suspended sediment are transported
by stream and rivers an amount corresponding to a 1 mm erosion of the soil in the country within
two years times. This amount represents high sediment yield as compared to other countries, that
is, 6 times as high as that of Northern America, 17 times that of Europe, and 22 times that of
Africa.
General Directorate of DSI has always been sensitive for erosion control activities. In this
framework in order to supply the sustainability of water and land resources and increase their
efficiency, DSI makes investigations on erosion and sediment control and for the prevention of
bad effects of the floods.
As of the end of 2010, through 409 projects of DSI, 332 settlements and 25,000 ha agricultural
land has been protected from the effect of erosion and sediment. Investigations are being done to