International Journal of Environment and Geoinformatics

11-25

Authors: Mehmet Zeki İmamoğlu, Elif Sertel

In this research, we comparatively analyzed different interpolation methods to create soil moisture maps by using field measurements and remotely sensed data. Impacts of number and distribution of field measurements on interpolation procedure was also investigated. Soil moisture measurements of 36 different locations collected from Büyükçekmece water basin and RADARSAT-1 image of the same region obtained simultaneously on 2nd of September 2010 to create soil moisture maps of the study region. Locations of 36 field measurement points were selected considering land use/cover, soil type, elevation, spatial distribution and accessibility to transportation lines. 25 of sample points were used as Control Points (CPs) and used for soil moisture map creation and 11 of them were reserved and used as Independent Check Points (ICPs) to validate the accuracy of each approach applied. Two different experiments were conducted with 25 and 15 CPs to analyze the impact of number and spatial distribution on interpolation. Inverse Distance Weighting (IDW), Global Polynominal Interpolation (GPI), Local Polynominal Interpolation (LPI), Radial Basis Functions (RBF), Kriging, Cokriging and regeression methods were applied to different combination of data sets to create soil moisture maps and obtained results were compared.

40-56

Authors: Alper Şen, Vedat Ekinci

The inadequate evaluation of geologic factors and unqualified and unplanned structuring play effective role in giant damage and loss of lives created by the earthquakes and faulty areas choice and structure construction cause building damages during the earthquake, thus it also causes giant loss of lives. Istanbul province and its immediate environment are located in north of North Anatolian Fault Zone having 1500 km length. Hence, it causes that the settlement’s Sea of Marmara coastal region is located in 1st seismic belt. The earthquake risk in Istanbul and related risk factors should be determined besides vulnerability and earthquake risk. A mathematical model has been created in geographic information systems for Kadıkoy, Maltepe and Prince Islands sub-provinces by using Fuzzy Logic method which is one of the artificial intelligence methods by considering 4 vulnerability parameters and earthquake vulnerability analysis have been made in this study. The used parameters are the location by fault line, geologic structure, building structure and the number of floors. The vulnerability grades emerged as a result of analysis have been studied and the distribution of buildings according to those levels have been presented via a thematic map. The pre-earthquake precautions should be determined for the study field by considering the vulnerability grades in case of any earthquake and the loss of life and property should be minimized.

76-91

Authors: Dursun Zafer Şeker, Ayşegül Tanık, Ercan Çitil, İzzet Öztürk, Süleyman Övez, Tüzin Baycan

Functional zoning of Akcakoca District located along the Western Black Sea Coast of Turkey is achieved by implementing the ‘Methodology for Spatial Planning for the Coastal Zone’ developed by European Union for coastal areas. The aim of applying the methodology was to realize functional zoning of the district that will eventually lead to spatial planning. In this technique, a typical base map at an appropriate scale and thematic layers are prepared for each of the environmental components for further analyses. The possibility to overlap different layers according to a specified procedure and to realize new theme mapping is a considerable factor while using GIS for the functional zoning. Identical grading system has been applied to each layer formed in order to achieve the overall importance and vulnerability maps of especially the natural components of the district. Functional zoning map is further developed through comparing different layers and current land-use information obtained from satellite imagery coupled with the findings of both the importance and vulnerability analyses. This attempt of applying such a methodology was a significant study as it addressed the decision makers on the multi criteria analyses through the visualized maps of different layers.