An avalanche hazard model for Bitlis Province, Turkey, using GIS based multicriteria decision analysis

Levent SELÇUK

doi:https://doi.org/10.3906/vet-1303-36

Makale detayları

An avalanche hazard model for Bitlis Province, Turkey, using GIS based multicriteria decision analysis

Yazarlar:

Levent SELÇUK

Yayıncı:

TUBITAK

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Turkish Journal of Earth Sciences 2013 Vol.22 Issue 4, pp.523-535

Belge Tipi:

Makale

Yayın Tarihi:

3/2013

Belge Dili:

İngilizce

Document ID (Org No.):

2000731745

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985

DOI:

https://doi.org/10.3906/vet-1303-36

Özet:

 

Most avalanche fatalities in Turkey have occurred in Bitlis Province. The scope of this research was to identify the avalanche hazard area of that province, using geographical information system (GIS) based multicriteria decision analysis (MCDA) and to evaluate it by means of sensitivity and accuracy analysis. The model consists of 5 GIS layers: elevation, slope, aspect, vegetation density, and land use. The hazard model is obtained by using a comparison matrix where all identified criteria of GIS layers are compared against each other. The acceptability of the model was determined using historical events. All of these events plotted over the model showed that there is a remarkable coincidence with high hazard areas. Approximately 90% of avalanche events have occurred in the high and moderately high areas. Settlement areas cover approximately 39,741 ha of study area and just 41 settlement areas (villages and towns) have ideal topographic characteristics to prevent avalanche hazard, while 82% of them are not suitable. The avalanche hazard model shows that the southeast and southwest parts of Bitlis (Center), Tatvan, and Hizan counties have the highest avalanche hazard. Therefore, site planning, construction of supporting structures, and control programs should be effectively integrated with avalanche pathways in potential areas.

 

Most avalanche fatalities in Turkey have occurred in Bitlis Province. The scope of this research was to identify the avalanche hazard area of that province, using geographical information system (GIS) based multicriteria decision analysis (MCDA) and to evaluate it by means of sensitivity and accuracy analysis. The model consists of 5 GIS layers: elevation, slope, aspect, vegetation density, and land use. The hazard model is obtained by using a comparison matrix where all identified criteria of GIS layers are compared against each other. The acceptability of the model was determined using historical events. All of these events plotted over the model showed that there is a remarkable coincidence with high hazard areas. Approximately 90% of avalanche events have occurred in the high and moderately high areas. Settlement areas cover approximately 39,741 ha of study area and just 41 settlement areas (villages and towns) have ideal topographic characteristics to prevent avalanche hazard, while 82% of them are not suitable. The avalanche hazard model shows that the southeast and southwest parts of Bitlis (Center), Tatvan, and Hizan counties have the highest avalanche hazard. Therefore, site planning, construction of supporting structures, and control programs should be effectively integrated with avalanche pathways in potential areas.

Makale detayları

An avalanche hazard model for Bitlis Province, Turkey, using GIS based multicriteria decision analysis

Yazarlar: Levent SELÇUK

Yayıncı: TUBITAK

Ana Başlıklar: Uygulamalı fizik

Dergi: Turkish Journal of Earth Sciences 2013 Vol.22 Issue 4, pp.523-535

Belge Tipi: Makale

Yayın Tarihi: 3/2013

Belge Dili: İngilizce

Document ID (Org No.): 2000731745

Sıklık: İki Aylık

eISSN: 1303-619X

pISSN: 1300-0985

DOI: https://doi.org/10.3906/vet-1303-36

Sayı

Yazarlar:

Levent SELÇUK

Yayıncı:

TUBITAK

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Turkish Journal of Earth Sciences 2013 Vol.22 Issue 4, pp.523-535

Belge Tipi:

Makale

Yayın Tarihi:

3/2013

Belge Dili:

İngilizce

Document ID (Org No.):

2000731745

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985

DOI:

https://doi.org/10.3906/vet-1303-36