Dogal Afetler ve Cevre Dergisi

13 - 26

Authors: Mustafa Umut KONANC

In this study, the potential of using olive tree (Olea europaea L.) as a biomonitor was investigated in monitoring heavy metal concentrations caused by traffic density. For this reason, in soil, leaf, fruit and shell samples collected from regions where traffic density is different in the city center of Artvin province, Sulfur content (%) was determined by elemental analyzer and heavy metals (Cr, Ti, Fe, Ni, Co, Cu, Zn, Pb and Al) was determined by ICP-OES. The accuracy of the assay measurements was tested using LGC 6187 for soil samples and ERM-CD 281 for plant samples. The differences in the measurement results obtained were determined using the ANOVA test According to the results obtained; the highest sulfur value in soil, leaves, fruit and bark was determined at the points with the highest traffic density. Heavy metal concentrations for Cr, Ti, Fe, Ni, Co, Cu, Zn, Pb and Al elements in plant and soil samples were compared with other studies and regulations, and all metals were found to be within the limit values. In statistical studies, it has been determined that there is a significant difference between points at 95% confidence level. In addition, it has been found that metal concentrations of soil, leaves, fruits and bark decrease as they move away from traffic areas. This is an indication that olives can be used as biomonitors in detecting traffic pollution.

41 - 58

Authors: Erhan ŞENER; Şehnaz ŞENER

In recent years, the negative effects of climate change on water resources have been observed. Due to the decrease in precipitation in the Burdur Lake basin, there is serious volume loss especially in surface waters. In this study, basin drought analysis was performed using standardized precipitation index (SPI) and China Z index (CZI) methods. For this, precipitation data of 6 different meteorological stations located in and around the basin were used. In addition, the relationships between SPI and CZI indices are statistically revealed. In Burdur Meteorology station, it was determined that the longest drought period was experienced in the 24-month time scale with the SPI method since January 1951 with 1612 days. However, the most severe drought has been determined to have lasted 2250 days with a severity of 70.027 since January 1989. According to the drought analysis using the China Z index at the same meteorology station, the longest drought periods were 1553 days since January 1989, with a severity of 70.782. According to the obtained results, medium and mild droughts were detected around the Burdur Lake and south of the basin in 2019. In addition, the R2 values of both methods (0.96-0.98) are quite high and very close index values were calculated.

75 - 88

Authors: Mahmut FIRAT; Cansu ORHAN; Salih YILMAZ; Özgür ÖZDEMİR

In water loss management, monitoring system behavior and analyzing system performance according to appropriate indicators is very important for improving operating conditions. However, appropriate calculation tools should be used to make these analyzes accurately, regularly, systematically and precisely. Therefore, in this study, the most appropriate indicators were determined based on the indicators proposed IWA and other organizations in literature in order to analyze and monitor the process performance in water loss management. A web-based "GGS basic performance analysis calculation tool" has been developed to systematically calculate these indicators and monitor performance. This tool basically includes volumetric and percentage indicators, service connection and per line length indicators, administrative and physical loss, economic and cost, failure and network rehabilitation indicators. The details of this tool were detailed, its advantages were discussed by analyzing of sample data set. It is believed that this analysis tool developed in this study will provide significant contributions to the analysis and monitoring of the performance of the Utilities in terms of water loss management and its components, and to evaluate the process performance for active leakage control activities.

101 - 109

Authors: Emre DEMİR

This study differs from previous similar studies in three main directions. Firstly, the location of the most suitable facilities that can provide regional service were determined by applying clustering method. Thus, not only one airport facility in a single location serving across the country was determined, which separates this research from the others. Secondly, in the previous studies, Istanbul Airport was not taken into account because it has not been put into service. Therefore, this study takes that particular airport into consideration. Thirdly, optimum solutions for such new situation were produced with more up-to-date data and using a modern optimization method, the tree seed algorithm. As a result of the analyzes made based on traffic data, traffic-based weight coefficients and location data from which transportation distances were obtained, a total of sixteen ideal airports were recommended that can provide service to their regions, especially during emergencies or after any disaster. In accordance with the suggestions of this research, it is expected that progress will be made in minimizing the loss of time and expense, and especially minimizing the loss of life thanks to the services which can be provided by air transportation in any emergency.

124 - 135

Authors: Ercan VURAL

With the industrial revolution, environmental problems have diversified and have increased significantly, affecting both the natural and the human environment. Air pollution, which is among the most important of these environmental problems, has been a serious problem today as it was in the past. In this study, which examines the human factors affecting air quality and pollution between 2007-2019 in the provinces of Southeast Anatolia Region, pollution shows continuity especially in certain provinces. Depending on this continuity, our aim is to detect air pollution in the provinces of the region and offer solutions to them. IDW (Inverse Distance Weighting) analysis was used through Geographic Information Systems to detect the spatial change of air pollution. With this analysis method, interpolation was provided between the measurements. The provinces with the highest SO2 concentration are Şanlıurfa and Siirt in 2007, Şırnak in 2012, Şanlıurfa and Siirt in 2017 and Şanlıurfa in 2019. PM10 annual average concentration is high in Batman in 2007, Gaziantep, Batman and Siirt in 2012, Şanlıurfa in 2017 and Şırnak in 2019. The number of population living in the city, the type and quality of fuel used in residences and industry, the number of industrial enterprises and the number of vehicles are among the important human factors affecting pollution. In this sense, local and national administrations should take serious measures in the air pollution that causes human health to deteriorate or even die.

149 - 158

Authors: Murat DOĞRUYOL

Siirt Province is one of the important cities of the Southeastern Anatolia Region. The fault lines around the Southeast Anatolia and surrounding region has caused serious earthquakes on the area. In this study, the study region has been decided as the circular area that is surrounding the 200 km radius of the city center of Siirt Province. The city center of Siirt stands at 37.55 North and 41.56 East coordinates and is effected by active fault lines connected to the East Anatolian Fault Zone and Southeast Anatolian Thrust. The statistical earthquake risk of the study region has been presented considering Gutenberg and Richter equation. In this study the moment magnitude (Mw) that is most suitable for Gutenberg-Richter Equation has been chosen from Boğaziçi University Kandilli Observatory and Earthquake Research Institute’s earthquake catalogue. From the catalogue the earthquake data of Mw ≥ 4 and between the years 1900-2020 was used. In the study magnitude frequency relation, seismic risk and return periods of the study region have been calculated. According to this R2 = 0.99, a constant has been calculated as 7.0994, b constant has been calculated as 1.0257. According to earthquake risk analysis of the study area the possibility of an earthquake in the next 50 years at the magnitude of 6.0 and 6.5 has been calculated as %79 and %38 respectively. While the return periods have been calculated as 32 and 105 years respectively. The purpose of the study is to remind the earthquake risk of the Siirt Province and to make sure earthquake truth of the area won’t be forgotten when deciding engineering structures and their location.

176 - 191

Authors: Muhammet ÇELİK; Mohammad Manzoor NASERY

Reinforced ground embankments having high energy absorption capacity, which are being used as rockfall protection systems, are massive structures. Various problems arise in the application of reinforced ground embankments on sloped terrain, where rockfall occurs, because of it is high bottom width. In this study, a solution was improved for the application of reinforced ground embankments walls on sloping lands and was examined by implementing a pilot project. Additionally, it was planned to obtain a flat platform on inclined land with a 6 m high stone retaining wall and filling in order to construct the reinforced ground embankments wall on it. Initially rock fall analyses were performed on 8 cross sections in order to obtain bounce height, velocity and total kinetic energy values prior to constructing the platform. The same analysis was once again performed following the platform construction and the obtained data were compared. This platform has reduced 83% of the rocks’ bounce heights, 62% of kinetic energy and 42% of velocity values. In the second part of the study, the cost of the reinforced ground embankments on the platform was compared with the costs of alternative projects. It was observed that constructing platform was 60.8% less expensive than a 6meter reinforced concrete wall with a 3meter steel barrier and 74.5% cheaper than a 6meter steel barrier. Steel barriers are disadvantageous compared to the reinforced ground embankments walls in various aspect such as reduction in length during rock collisions, construction cost, maintenance costs, import and adaptation to nature. For the reasons above, we have concluded that construction of reinforced ground embankments wall over a constructed platform is a more efficient improvement solution in terms of both safety and cost. The developed solution within the scope of the study was applied in the rockfall protection project in Güney neighborhood, Maçka District of Trabzon Province.