Sezer Ünal

Introduction: Road-transport corridors in dense metropolitan areas concentrate air pollution while providing little space for mitigation. Methods: This study develops an integrated decision-support framework for roadside vegetation selection and ecosystem-service screening at Istanbul’s D-100 Göztepe Junction. Twelve criteria were examined with DEMATEL, SWARA, entropy weighting, and TOPSIS. An initial screening pool was reduced to 27 taxa with complete data across all 12 criteria; these alternatives entered the final category-specific TOPSIS analysis. The primary closeness coefficients were calculated with entropy weights, while SWARA-weighted TOPSIS served as a sensitivity analysis; DEMATEL was retained as a causal diagnostic and was not mathematically combined with TOPSIS weights. Results: The entropy solution ranked Robinia pseudoacacia first among trees (CC = 0.5930), Nerium oleander first among shrubs (0.5764), and Hedera helix and Parthenocissus quinquefolia jointly first among climbers/groundcovers (0.758). Entropy- and SWARA-weighted rankings showed strong agreement for trees (Spearman ρ = 0.905) and moderate-to-strong agreement for shrubs (ρ = 0.806) and climbers/groundcovers (ρ = 0.717), although Nerium oleander and Pinus mugo were weight-sensitive. Discussion: Scenario outputs increased from S1 to S3, but they are i-Tree-informed screening estimates rather than measured concentration changes or a site-calibrated aerodynamic simulation. The framework supports transparent shortlisting followed by mandatory biosecurity, toxicity, safety, airflow, and field-validation checks before procurement or planting.

Bu çalışma, Bandırma kent merkezinde yer alan General Balcı Çamlık Yürüyüş Ormanı (GBÇYO) ile Atatürk Ziraat Bahçesi’nin (AZB) peyzaj niteliklerini, erişilebilirlik düzeylerini ve sürdürülebilirlik potansiyellerini karşılaştırmalı olarak incelemektedir. Kentsel yeşil alanlar, ekolojik dengeyi korumanın yanı sıra sosyal bütünleşme, fiziksel-zihinsel sağlık ve estetik değerler açısından da çok işlevli alanlardır. GBÇYO, doğal bitki örtüsü, zengin habitat çeşitliliği ve topografik özellikleriyle kent içinde biyolojik çeşitliliği destekleyen önemli bir ekolojik çekim merkezidir. Aynı zamanda doğa temelli rekreasyon olanakları sunarak kullanıcılarına çevresel farkındalık kazandırmaktadır. AZB ise kent merkezine yakın konumu sayesinde yüksek erişilebilirliğe sahip olup, planlı peyzaj yapısı, sosyal donatı alanları ve rekreatif kullanım olanakları ile öne çıkmaktadır. Her iki alan da sürdürülebilir kentsel yaşamın desteklenmesi açısından önemli işlevlere sahiptir. Çalışma, peyzaj kalitesinin artırılması, kullanıcı ihtiyaçlarına duyarlı planlamanın geliştirilmesi ve yeşil alan yönetiminde katılımcı yaklaşımların benimsenmesi gereğine dikkat çekmektedir.

This study examined the environmental impacts of emissions from road transportation in the city center of Bandırma and the role of green infrastructure in reducing these impacts. It was determined that the increasing population and number of vehicles increased traffic density and negatively affected air quality. Green tissue deficiencies in the current transportation infrastructure were identified through the analysis of local emission sources and suggestions were presented to eliminate these deficiencies. It was emphasized that roadside afforestation and green barrier applications, especially in heavy traffic areas, were effective in reducing air pollution. It was shown that harmful emissions such as particulate matter (PM), nitrogen oxides (NOₓ) and carbon monoxide (CO) could be captured and air quality could be improved with plant arrangements. In the study, approximate pollution calculations for Bandırma were made with EPA data and the effectiveness of green infrastructure applications was supported. Multi-criteria decision-making methods TOPSIS and EDAS were used for the selection of plant species; plants and their criteria were evaluated with expert opinions. The results show that green infrastructure is critical for controlling traffic-related emissions in Bandırma and that these applications can be a model for other cities. It is recommended that local governments adopt correct plant selection and planting strategies. The study aims to contribute to sustainable city planning.