Author(s)

CAGRI CIMEN, ANIL OLGAC

Abstract

Floods are the most damaging secondary natural disaster, after earthquakes. In this sense, in order to ensure the flood safety of the rivers especially in the city center, rehabilitation activities are carried out and other purposes are not generally taken into consideration. In parallel with this, as a consequence of dense housing in metropolitan areas in our country, the landscape in the cities being inadequate and the need for recreational common areas where people can relax is increasing. When all this is taken into account, it is thought that rehabilitation of the creeks would be possible, as well as creating breathable areas. Generally accepted practice for the river rehabilitation project is just discharging the flood with adequate geometry and dimension of channel, while a recreational feature will also be provided with this study. It is foreseen that conventional calculation methods will be inadequate for this study. To provide visually more livable environment around the creek bands; a clean and steady water image will be aimed at normal seasons (except during flooding) in the reclamation channel. Necessary hydraulic structures (like embankments, etc.) and chutes suiting the site topography will be placed in the channel for this target. The tributary creeks connected to the main river will also be included in the calculations as part of the overall design. At the same time, trying to create a steady and clean water image requires the developing of economically viable solutions for the operation of rehabilitated river. In this sense, it is thought that creek water will not be suitable due to the sediment transported by the creek for the desired steady water condition in the channel. Hydraulic structures will be designed to trap these deposits and this design will be implemented as part of the whole.

Keywords

flood, creek rehabilitation, recreational water channel, water image, flood safety, flood modelling