City and Regional Planning / Şehir ve Bölge Planlama

Permanent URI for this collectionhttps://hdl.handle.net/11147/4274

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Subject: search.filters.subject.IzmirWoS Q: search.filters.wosQuartile.N/A

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Now showing 1 - 4 of 4
  • Conference Object
    Detection of Urban Change Using Remote Sensing and Gis: Izmir Case
    (Taylor and Francis Ltd., 2008) Tarhan, Çiğdem; Arkon, Cemal; Çelik, M.; Gümüştekin, Şevket; Tecim, V.
    This study is an example of how land use changes could be detected via high resolution remotely sensed data. In order to perform "change detection" IKONOS satellite images, belonging to 2001 and 2004, have been used. An automated Graphical User Interface (GUI) has been created for detection of environment. Different image enhancement techniques and a fuzzy inference system have been combined in the GUI. The detection results are classified according to some basic levels such as 20-50% and 70%. Additionally, four different change detection algorithms have been applied which are pixel-based, object based, feature based. These algorithms have been examined according to change detection levels with different image enhancement techniques. At the end of the study, the results have been compared.
  • Conference Object
    Citation - WoS: 35
    Detection of Flood Hazard in Urban Areas Using Gis: Izmir Case
    (Elsevier, 2016) Özkan, Sevim Pelin; Tarhan, Çiğdem
    The aim of this study is to predict the potential flood-hazard areas using Shuttle Radar Topography Mission-Digital Elevation Model (SRTM-DEM). The study area is the province of Izmir. SRTM-DEM of the Izmir Province has 90 m of grid size resolution; 45 m of horizontal accuracy; and 15 m of vertical accuracy. Within this study, obtaining spatial information on flood hazard by using Izmir digital terrain models and by 3D analysis that will help to achieve the regional flood hazard management scheme is aimed. Flood-hazard areas have been identified by the use of digital elevation model covering the study area. The main rivers in the study area are Gediz, Kucuk Menderes and Bakircay that creates the coastal flood plains. In order to estimate the spatial distribution of flood-hazard areas in Izmir, five factors are used: flow accumulation, land use, slope, rainfall intensity, and elevation. The classic hydrological modelling approach was applied to determine the rainfall intensity; rainfall intensity of study region is created with the average amount of total rainfall intensity of fifteen stations in the two basins per minute using the interpolation method (spline interpolation). By the digitizing rivers, topography, flow direction and flow accumulation, as well as the flood detention areas are determined. These factors were combined with the weighted overlay method to determine categorized flood-hazard areas. As a result, possible flood-hazard areas have been determined in the case of Izmir Province. (C) 2016 The Authors. Published by Elsevier Ltd.
  • Conference Object
    Effect of Urbanization on Groundwater Resources of Izmir City
    (İZSU, 2017) Baba, Alper; Yazdani, Hamidreza
    İzmir is the third largest city in Turkey. Fifty­six percent of the drinking water of İzmir city is provided from groundwater resources. Halkapınar (located on Bornova Plain) is one of the important groundwater resources areas. This region is providing 16 % of İzmir drinking resources. The water withdraws from the Halkapınar wells is about 30 million m3 in recent years. The groundwater levels of Bornova plain are range from 1 m to 10m. This plain had been used as agricultural lands until the 1950s, while today they have been opened for settlement. In 1965 Bornova accommodated half of its population in rural areas after receiving so much immigration. It was inevitable to open the city­centre to housing and to consider the surrounding village areas as urban areas. By the year 2000, the rural population had already been melted into the urban population. The agricultural areas in rural parts of the country will have completely disappeared in 50 years' time. Much of the surface of the plain is rendered impermeable by buildings, roads and surface coverings. Because of this covering, groundwater recharge is reduced and increases and accelerates runoff the plain. The groundwater recharge from precipitation was about 27 % in 1925, but this amount dropped to 13% in 2012. Groundwater recharge from precipitation will be 1% in 2030. Hydrodynamic of plain is change because of excessive urbanization. Groundwater level of the plain still high because tall building makes a barrier for groundwater recharge points.
  • Conference Object
    Citation - Scopus: 10
    The Rationale Behind Growth Patterns: Socio-Spatial Configuration of Izmir, Turkey 1700s - 2010
    (Space Syntax Laboratory,The Bartlett School of Architecture, 2015) Can, Işın; İnce, İrem; Yamu, Claudia
    Izmir, which the recent excavations have shown to be an 8000-year-old city, has gone through various stages in its development process. It was an important harbour city located on Turkey's west coast, triggering commerce between east and west. When the inner harbour was revitalized in the 17th century, trade activities increased and the city became an even more popular destination for Levantines1. By the 19th century, therefore, ̄zmir s morphology was defined by its cosmopolitan structure, especially where the historical centre emerged. The urban pattern changed drastically during the period between the end of the 19th century and the beginning of the 20 century. In each period, intrinsic and extrinsic socio-spatial dynamics including natural and man-made disasters, planning decisions, and the exchange of Greek and Turkish immigrants determined the growth processes of the city. This study investigates the generative rules of Izmir's urban structure by looking at nine different periods based on intrinsic and extrinsic dynamics. These periods were chosen according to the availability of historical maps and data. We observed morphological changes throughout the 1700s and the years 1836, 1856, 1876, 1885, 1905, 1922, 1941, and 2010. In order to analyse urban transformation and growth processes coupled with underlying indicators, this study uses segment angular analysis. Socio-spatial dynamics are discussed for each period. This paper aims to reveal how intrinsic and extrinsic phenomena shape urban form in cities. By looking at a hybrid city like Izmir incorporating radial, orthogonal and organic patterns, this study tries to understand urban transformation over time using space syntax analysis.