Değirmendere’nin CBS Tabanlı Deprem Risk ve Erişebilirlik Analizi

Year 2017, , 31 - 45, 31.12.2017

İsmail Talih Güven , Deniz Gerçek

https://doi.org/10.32569/resilience.364276

Cited By: 1

Abstract

Bu çalışmada, Değirmendere beldesinde, Coğrafi Bilgi
Sistemleri (CBS) temelli, depreme yönelik afet yönetimi zarar azaltma amacıyla
bir sistem geliştirilmiştir. Geliştirilen sistem için öncelikle bölgede
yapılmış olan çalışmalar, 17 Ağustos 1999 depreminde bölgede oluşan zararlar ve
sebepleri incelenmiş ve bölgede depremde yapıları etkileyen yerbilimleri
verilerine dayanarak risk oranları ve yerbilimleri verilerinin alt
kategorilerinin etki oranlarına göre alt risk oranları belirlenmiştir. Bölgenin
depreme yönelik tehlike analizinin yapmakta kullanılan bu verilerin CBS ortamında
değerlendirilebilmesi için Analitik Hiyerarşik Süreç (AHS) yöntemi ile
ağırlıklandırılması yapılmıştır. Analiz birimi olarak ‘alan’ ı esas alan diğer
CBS çalışmalardan farklı olarak, tüm veriler, yapı birimlerinin öznitelik
değeri olarak CBS ortamına aktarılmıştır. Bölgede yaşayan nüfus ile ilgili
demografik bilgiler Nüfus Vatandaşlık Genel Müdürlüğü’nden elde edilmiş ve yine
yapılara ait veri olarak CBS ortamına aktarılmıştır.

Sonrasında da CBS ortamında tehlike analizleri
yapılarak bölgedeki riskli yapılar ve risk oranları belirlenmiştir. Diğer afet
yönetimi çalışmalarından farklı olarak, riskli yapılarda yaşayan nüfus verileri
de değerlendirilmiş ve bunlara yönelik önerilerde bulunulmuştur.

Keywords

Afet Yönetimi, Analitik Hiyerarşik Proses, Coğrafi Bilgi Sistemleri, Zarar Azaltma

The GIS-Based Earthquake Risk and Accessibility Analysis of Değirmendere

Abstract

A system is
developed within Geographical Information Systems (GIS) with the aim of hazard mitigation
of earthquakes in Değirmendere for disaster management. Initially, former
studies conducted in the region have been examined; the damages during the
earthquake on August 17, 1999 and their reasons have been investigated.
Regarding the earth sciences data that affect buildings during an earthquake
ratios of risk and in relation to degree of affect of sub-categories of these
data to buildings during an earthquake have been identified. In order to be
able to evaluate the risk analysis of the region for earthquakes within GIS,
the weighting of these data have been realized with the method of Analytic
Hierarchy Process (AHP). In contrast to other GIS studies which take regions as
basic mapping unit, all data have been transferred into GIS medium as a attribute
value for building entities.

Demographic
information on the residents of the region have been obtained from the General
Directorate of Civil Registration and Nationality, and transferred into GIS
medium as another value for each building. Afterwards, risk and network
analyses have been conducted in GIS Medium, and the buildings under risk and
their ratios have been determined. As a contrast to other studies of disaster
management, demographic data of the population living in buildings under risk have
also been evaluated and suggestions have been made for these cases.

Keywords

Disaster Management, Analytic Hierarchy Process (AHP), Geographical Information Systems (GIS), Risk Analysis, Network Analysis, Hazard Mitigation

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