Master Degree / Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/11147/3008
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Master Thesis Assessment of Groundwater Potential Using Geographic Information System Based Multi Criteria Decision Analysis Methods: Case Study of Panj Amu River Basin, Afghanistan(01. Izmir Institute of Technology, 2024) Abhar, Mohammad Tarıq; Demirkesen, Ali Can; Baba, AlperAfghanistan, where water is the most important resource for energy production and the economy. The country still struggles with access to clean drinking water, and its main supply of drinking water comes from groundwater. Unfortunately, not much is known about the country's groundwater system. The assessment of groundwater potential and groundwater stability is crucial for sustainable water management, agricultural development, urban and rural water supply, and disaster mitigation. It supports environmental protection, economic development, public health, and conflict prevention by ensuring reliable and sustainable access to groundwater resources. In regions such as the Panj Amu River Basin, this identification is particularly important due to the high dependence on groundwater. Therefore, the thesis focuses on water budget, groundwater potential, availability, and the impact of various parameters on groundwater recharge of the PARB using the Analytical Hierarchy Process (AHP), Frequency Ratio (FR) and Evidential Belief Function (EBF) methods. Ten thematic layers including precipitation, geology, lineament density, drainage density, soil texture, land use and land cover, topographic wetness index, curvature, normalized difference vegetation index and slope gradient were used as influencing factors along with groundwater static level data, runoff and evapotranspiration for this research work. All geographic datasets were analyzed using the ArcMap environment and the required spatial data were obtained from various approved relevant online sources. The water balance analysis for the Panj Amu River Basin indicates that 1.887 billion cubic meters' infiltrates into the groundwater system annually. The total annual groundwater consumption by humans, livestock and agricultural activities amounts to 808.19 million cubic meters. Consequently, the annual net groundwater budget in the basin is 1.078 billion cubic meters, suggesting that the groundwater system in the PARB is currently sustainable. All three methods indicate high groundwater potential in sparsely v populated mountainous regions with high rainfall and permeable geology and soil conditions. The key regions include the northeast of Takhar, the east and southeast of Baghlan and the northwest and east (some parts of the Wakhan corridor) of Badakhshan have high groundwater potential. In general, the Panj Amu River Basin has moderate groundwater potential. Area Under the Curve (AUC) and Receiver Operating Characteristic (ROC) analysis were used to validate the study. The results show that the EBF methods has the highest efficiency with an AUC of 92.6%, followed by the FR method with 91.5% and the AHP model with 80.2%.Master Thesis Gis-Based Determination of Suitable Agricultural Areas and Comparison With Current Land Use, the Case Study of İzmir(Izmir Institute of Technology, 2022) Ekinci, Özge; Demirkesen, Ali CanAgricultural production is the main source of life for humanity. In order to the protection and proper use of agricultural lands are of great importance. İzmir has a high potential in terms of agricultural areas. There are three basin areas within the provincial borders and fertile agricultural areas where the continuity of agricultural production can be ensured. With the effect of urbanization and population growth, the settlements expanded towards agricultural areas. For the correct use, sustainability and efficiency of agricultural lands, the most suitable areas in terms of agricultural production should be analyzed correctly. This study was carried out to determine the most suitable areas for agriculture in İzmir. The study considers a Geographic Information System GIS-based approach. The combination of multi-criteria decision analysis (MCDA) and GIS can be used in the process of generating solutions for complex planning problems. In the first stage of the study, the criteria were weightlessly overlayed, and a result map was obtained. In the second stage, weights were obtained for each criterion using the Analytical Hierarchy Process (AHP). Suitability analyzes for the study area were obtained by weighted overlay analysis using GIS. Environmental characteristics, soil characteristics and economic factors were taken into account while performing the suitability analysis for agricultural areas. The same criteria were used for both suitability analyses. As a result of the comparison between the two maps, a resultant map obtained by the weighted overlay method was found to be more reliable, and the results were compared with the current situation. In the current situation comparison, Great Lowland Protection Areas, 1/100000 Scaled Environmental Plan, and Law No. 5403 are discussed. When the comparisons were made, the areas that differed with the current situation were determined. It is seen that the agricultural lands obtained as a result of the suitability analysis are spread over wider areas compared to the current situation.Master Thesis Gis-Based Determination of Suitable Areas With Multi-Criteria Approach for Solar Power Plants and Assessment of Land Decisions: the Case Study of İzmir(01. Izmir Institute of Technology, 2021) Toprakcı, Nevin Selin; Demirkesen, Ali CanThe need to energy has become an important reality for human life with the increase in living standards and population. İzmir has important renewable energy sources especially solar energy. Rapid urbanization and environmental problems due to internal migration after the 1960s have made renewable energy sources a priority because of the wrong implementations of urban policies in İzmir. In order to talk about energy potential, it is first necessary to talk about and analyze the land potential. It is necessary to determine the true criteria and methods for true analyzes of the suitable areas for efficiency and sustainability. The study presents a GIS-based approach to identify the most suitable area for Solar Power Plants (SPP) development in İzmir. The first suitability map includes 9 criteria. The last suitability map includes the first suitable map results and criteria of land capability class (10th criteria) using the same method. It can be said that the SPP installation is more suitable, especially the northern part of İzmir and districts of border. When the evaluation is compared, it can be said that İzmir has fertile lands and it should definitely be taken into account in energy projects. It also draws attention importance of land use decisions and legislation while choosing the suitable area from perspectives of planning. In addition, the current and potential solar energy area choices were evaluated together with the results which are produced for the study area in terms of land decisions and planning.Master Thesis Archiving of the Conservation Data of Immovable Cultural Assets Dating To 1300-1600 in Urla Center Using Gis(Izmir Institute of Technology, 2019) Yönder, Veli Mustafa; Turan, Mine; Demirkesen, Ali CanThis study aims to create a digital archiving system of immovable cultural assets belonging to the early Turkish time frame in Urla historic center. Forming a database with the assistance of the Geographic Information System (GIS) to comprehend and assess the life stories of monuments and to access various user profiles is also considered. In the methodology section; academic articles, books, journals, personal archives, data acquired from state institutions or architectural offices, and the data obtained during fieldwork (physical status and interviews with users) were processed in a GIS platform. Academic reviews and researches of the buildings were conducted. In the decision-making process, which is a sophisticated and multidimensional process, the share of conservation data and data management in the whole process becomes progressively significant. Documentation and registration of architectural immovable cultural assets, which is one of the important figures in the urban context, are conducted under the supervision of the Regional Directorate of Pious Foundations or the Conservation Board. Therefore, extracting a large number of mass data produced each year and making the required classifications make assist decision-making processes. In the discussion and results part, analysis and comparative study of all conservation data of the cultural assets were performed. The results for constructing the database are understanding the scope, accessibility, developers, scale, and data types. In the results for the conservation data archived: are understanding historical background, physical characteristics, conservation activities, and interpreting conservation decisions about buildings.Master Thesis Determination of Flood Risk Areas and Mitigation Strategies: a Case Study of the Menemen Plain, Izmir(Izmir Institute of Technology, 2019) Günseli, İsmail Gökhan; Demirkesen, Ali CanAccording to literature, natural disasters are increasing worldwide. Among them, flood is the most common and has the most impacts. Because of global warming and climate-patterns changing, frequency of floods has increased significantly. Also, the greatest impact among the human-oriented reasons are urbanization and industrialization. With the spread of urbanization, population in cities around the world has increased rapidly; natural areas have been destroyed, cities have been expanded. These changes have increased fragility in cities. Therefore, objective of the study was to determine flood risk areas and minimize negative impacts of floods. Accordingly, the study area; the Menemen Plain and its surroundings were found worthwhile to examine due to its topographic, climatic and hydrological structure. In this study, weighted-overlay analysis method was used in ArcGIS to determine flood risk areas employing six criteria. Therefore, six criteria that have an impact on flooding were identified as; (1) slope, (2) elevation, (3) distance from rivers, (4) distance from junction-points of river, (5) land use/cover, and (6) rainfall. The weights of criteria were assigned by land and literature investigation. According to the study, the highest risky flood locations with more population were seen as Emiralem, Kesik, Buruncuk and Çavuşköy settlements. On the other hand, medium flood risk settlements with more population were found as Seyrek, Yahşelli, Sasalı and Yenibağarası. Consequently, resilience and mitigation strategies were identified. It was stated that flood risk management should be managed in a participatory manner with a holistic approach and public-private-individual partnership with structural, non-structural measures.Master Thesis Investigation of Vegetation and Agricutural Soils in Relation To Groundwater by Using Geographic Information Systems (gis): a Case Study of Manisa, Alaşehir Basin(Izmir Institute of Technology, 2018) Budak, Seda; Demirkesen, Ali CanGroundwater is a natural resource that is directly or indirectly affected by any intervention in nature that we use in all areas of our life. In this sense, the issue of the groundwater is a study-subject that interests many professions and researches. Urban planning is a profession area that is directly related to the groundwater issues as decision-making on spatial and functional decisions about the city and the natural environment. However, groundwater resources are not taken into account as aboveground natural resources during the planning phase. Plans without consideration of groundwater potential cause threatening consequences for both existing natural resources and residents in the region. For this reason, the focus point of the thesis is the groundwater and its determination and investigation of relationship among the groundwater, vegetation, and agricultural soils. The aim of this thesis is to determine the groundwater potential (GWP) locations of Alaşehir Basin by a multi-criteria (proxies) method based on Geographic Information System (GIS) integrated with Remote Sensing (RS). The method used in this study includes 10 proxies as mult-criteria that play important roles on determination of the potential of the groundwater, combining these proxies in a digital media and illustrating output image maps of them. These proxies are: Normalized Difference Vegitation Index (NDVI), Modified Normalized Difference Water Index (MNDWI), land-use land-cover (LULC), lineament, topography (Digital Elevation Model – DEM), slope, drainage, lithology, hydraulic conductivity, and soil types. The main data sources of the study are: Landsat-8 OLI multi-spetral satellite image bands, the Aster Digital Elevation Model (DEM) of the study area and the GIS data layers from the institutions and research studies. According to study, the most GWP locations are seen in northeast of Salihli, in southeast of Alaşehir and around Dereköy. This findings are so important for planning in terms of groundwater pollution risk management.