Yazar "Degerliyurt, Mehmet" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    Determination of Forest Fires' Effect to Erosion by Using Geographical Information Systems: Case Study, Amanos Mountains
    (Marmara Univ, 2014) Degerliyurt, Mehmet
    Erosion which is typically the transportation of soil covering the surface via rivers and winds, is a global phenomenon resulting from thinning of land cover and aridity of soil. The best element preventing the erosion is forests. However, the most detrimental element to the forests which have vital importance in protecting the soil is forest fires. Because; the impact of the raindrops into the land is changed after forest fires, as the soil water balance deteriorates and it becomes vulnerable to the erosion. In this study, the amount of loss of sediments in the area which has become vulnerable to the erosion due to forest fire occurred at 05.08.2013 in the part of Amanos Mountains lying within the frontiers of Hatay was calculated for both the erosions which have occurred before the forest fire and could possibly occur right after the fire. Thus, the impact of forest fires into the erosion was proved. To this end; digital map belongs to the burnt forest land taken from Hatay Forestry Department, weather data, digital contour line data belonging to General Command of Mapping, Digital Elevation Model (DEM), soil map and satellite image were used. The study comprises 3 phases. Initially, the amount of sediments carried by the erosion occurred in the study area before the forest fire was calculated. At second stage, the amount of sediments which could be carried by possible erosion would occur in that area which has become deprived of forest coverage due to the forest fire. RUSLE (Revised Universal Soil Loss Equation) method was used for both phases. After analysis made, it was determined that there has been a decrease on the places with very low, low and moderate susceptibility while the places with high and very high susceptibility to the erosion in that area which has become deprived of forest coverage due to the forest fire have increased. Furthermore, it was calculated that the amount of soil carried by the erosion after the forest fire was 0-144.70 ton/ha/year while it was 0-32.57 ton/ha/year before the forest fire. It was identified that the amount carried by the erosion after the forest fire was 4.44 times higher than before. At third stage, field work was made. During this study, it was observed that the land was under heavy destruction of erosion before the forest fire due to existing topographic and climate conditions. As it was pointed out that the loss of protective effect of forest coverage which has completely been destroyed after forest fire would further increase the erosion, it was decided that it is necessary to start afforestation as soon as possible. As it is one of the empirical studies aimed at proving the impact of forest fires into the erosion, it is expected that this study would contributed to the literature.
  • Küçük Resim
    Öğe
    Settlement suitability analysis of local ground characteristics in Iskenderun: A case study
    (Elsevier Science Bv, 2014) Degerliyurt, Mehmet
    Current study aimed to determine the settlement suitability of local ground characteristics in the city of Iskenderun. In this context, classes such as lithology, distance from fault lines, shear velocity (Vs), ground water, distance to sea and slope suitability were generated by utilizing geology maps, landslide velocity (Vs), and digital contour line data scaled 1:25.000 obtained from Mineral Research and Exploration Institute, Iskenderun Municipality and General Command of Mapping respectively. Multi criteria decision-making analysis was used to assess these suitability classes. Results show that 3 % of study area has 1st degree of suitability while 7 % and 21 % have 2nd and 3rd degree of suitability, respectively. Moreover, 69 % of study area was found to display ground characteristics not suitable for settlement. It is observed that the degree of damage caused by an earthquake in this study area would be more than expected, as settlements were often made in the areas with no suitability or 3rd degree of suitability. Therefore, damage reduction measures should be immediately taken. (C) 2013 The Authors. Published by Elsevier Ltd.